CN105409073B - The wavelength alignment methods and device of laser, ONU, OLT and PON system - Google Patents

The wavelength alignment methods and device of laser, ONU, OLT and PON system Download PDF

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CN105409073B
CN105409073B CN201480012297.1A CN201480012297A CN105409073B CN 105409073 B CN105409073 B CN 105409073B CN 201480012297 A CN201480012297 A CN 201480012297A CN 105409073 B CN105409073 B CN 105409073B
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luminous power
laser
power spectrum
dbr
light
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CN105409073A (en
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陈健
王衡
徐之光
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Shanghai Pengbang Industrial Co ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
    • H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
    • H01S5/125—Distributed Bragg reflector [DBR] lasers

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

A kind of wavelength alignment methods and device of laser (30,51,61), ONU, OLT (90) and PON system, by adjustable range, adjusting the I of laser (30,51,61)phaseOr the temperature of gain region, measure the luminous power spectrum of the reflection or transmitted light that obtain laser (30,51,61), then determine that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, by the determining corresponding I of target light power spectrumphaseOr the I that peak point is indicated in the temperature and target light power spectrum of gain regionDBRAt least two parameters are as the parameter for adjusting laser (30,51,61).To avoid the mapping table using laser parameter and outgoing light wavelength, determines the parameter for adjusting laser, reduce the cost of laser.

Description

The wavelength alignment methods and device of laser, ONU, OLT and PON system
Technical field
The present invention relates to the communication technology more particularly to the wavelength alignment methods and device of a kind of laser, ONU, OLT and PON system.
Background technology
Tunable laser be it is a kind of can be to the laser that outgoing light wavelength is adjusted, such as Distributed Bragg Reflection (distributed Bragg reflective, DBR) laser, tunable laser may be disposed at passive optical network (Passive Optical Network, PON) it may also be disposed in optical network unit (Optical Network Unit, ONU) in system In optical line terminal (Optical Line Terminal, OLT).DBR laser includes the gain region for being emitted light wave, edge The negative direction of gain region light extraction is disposed with phase-shifted region and the areas DBR.When the laser is different from having in optical transmission chain When the wavelength division multiplexer (Multiplexer, MUX) of bandwidth chahnel is used cooperatively, by the areas DBR Injection Current (IDBR) With phase-shifted region Injection Current (Iphase) the two DBR laser parameters adjusting, or by the areas DBR Injection Current and gain The adjusting of the two DBR laser parameters of area's temperature realizes the adjusting to laser emitting optical wavelength, so that laser goes out Optical wavelength is penetrated within the scope of MUX bandwidth chahnels, that is to say, that realize the wavelength alignment of laser.
In the prior art, it needs in producing laser procedures, the mapping for establishing laser parameter and outgoing light wavelength is closed It is table, to which in the alignment of the wavelength of laser, swashing corresponding to required outgoing light wavelength is determined according to the mapping table Light device parameter.But due in the prior art, it is necessary to which then wavelength needed for precognition can be swashed according to aforementioned mapping table The wavelength of light device is aligned, and not only operating process is cumbersome, it is also necessary to and it is artificial to participate in, in addition, establishing laser parameter and outgoing light wave The cost of long mapping table is higher, to improve the cost of laser.
Invention content
The embodiment of the present invention provides a kind of wavelength alignment methods and device of laser, ONU, OLT and PON system, avoids Using the mapping table of laser parameter and outgoing light wavelength, the parameter for adjusting DBR laser is determined, to reduce DBR The cost of laser.
First aspect provides a kind of wavelength alignment methods of laser, including：In adjustable range, the phase of laser is adjusted Position area Injection Current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, the luminous power spectrum instruction swashs The electric current I of the dbr region of light deviceDBRWith the correspondence of the luminous power of the emergent light of laser；The emergent light is institute Optical signal that laser is emitted is stated by a part of speculum and wavelength division multiplexer MUX, reaches second part speculum, It is reflected by the second part speculum and first part's speculum, the reflected light of acquisition is reached by the MUX；Or Person, the emergent light pass through the MUX, the transmitted light of acquisition by the optical signal that the laser is emitted；From the light work(obtained Determine that the best luminous power spectrum of axial symmetry is target light power spectrum in rate spectrum；By the determining corresponding I of target light power spectrumphase Or gain region temperature and the target light power spectrum in the I that is indicated of peak pointDBRIn at least two parameters as adjust Save the parameter of laser.
It is described to determine axis pair from the luminous power spectrum obtained in the first possible realization method of first aspect Property best luminous power spectrum be referred to as target light power spectrum, including：Calculate the symmetry value of each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction to compose apart from luminous power The nearest mode hopping point of peak point；The second mode hopping point is along IDBRPeak point that augment direction is composed apart from luminous power is nearest Mode hopping point；In each luminous power spectrum, the target light work(best as symmetry will be composed with the luminous power of minimum symmetry value Rate is composed.
With reference to first aspect with the first possible realization method of first aspect, second in first aspect is possible It is described in adjustable range in realization method, adjust the phase region injection current I of laserphaseOr the temperature of gain region, it obtains The luminous power spectrum of the laser is obtained, including：In adjustable range, I is adjusted by default step-lengthphaseOr the temperature of gain region, Measure luminous power spectrum；For each luminous power spectrum measured, whether the luminous power spectrum measured described in judgement meets the first judgement item Part, the second Rule of judgment and third Rule of judgment；If first Rule of judgment of luminous power spectrum satisfaction measured, second judge item Part and third Rule of judgment then compose the luminous power spectrum measured as the luminous power of the acquisition；If the light measured Power spectrum is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；Wherein, described The luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates is more than first threshold, the first threshold It is to be determined according to light loss of the light power and reflected light of laser in optical transmission chain；Second Rule of judgment is The luminous power absolute value of the difference of reflected light between first mode hopping point and the second mode hopping point is less than second threshold, the second threshold It is that the isolation of the light loss and MUX according to the light power, reflected light of laser in optical transmission chain determines；Described Three Rule of judgment are the symmetry value of luminous power spectrumLess than third threshold value, wherein IDBR1For the first mode hopping point The I indicatedDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImThe I indicated by peak pointDBR, the third threshold value is root According to the light power of laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation determine.
The possible realization method of with reference to first aspect the first, in the third possible realization method of first aspect In, the luminous power for the reflected light that the mode hopping point is indicated is indicated more than at least one consecutive points adjacent with the mode hopping point Reflected light luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is It is determined according to the isolation of the light power of the laser and the MUX.
With reference to first aspect, the possible realization method of the first of first aspect, first aspect second of possible reality The third possible realization method of existing mode and first aspect, in the 4th kind of possible realization method of first aspect, institute It states the determining corresponding I of target light power spectrumphaseOr gain region temperature and the target light power spectrum in peak point The I indicatedDBRIn at least two parameters as adjust laser parameter after, further include：Send the adjusting laser Parameter.
The 4th kind of possible realization method with reference to first aspect, in the 5th kind of possible realization method of first aspect In, the parameter for sending the adjusting laser includes：It sends physical layer operations management and safeguards PLOAM message；It is described Adjustment control Tuning Control fields in reservation Reserve fields or the PLOAM message in PLOAM message are taken With the parameter for adjusting laser.
Second aspect provides a kind of wavelength alignment device of laser, including：Obtain module, the phase for adjusting laser Position area Injection Current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, the luminous power spectrum instruction swashs The electric current I of the dbr region of light deviceDBRWith the correspondence of the luminous power of the emergent light of laser；The emergent light is institute The optical signal that laser is emitted is stated, by a part of speculum and wavelength division multiplexer MUX, reaches second part reflection Mirror is reflected by the second part speculum and reaches first part's speculum, the reflected light of acquisition by the MUX； Alternatively, the optical signal that the emergent light is emitted by the laser, passes through the MUX, the transmitted light of acquisition；Determining module, For determining that the best luminous power spectrum of axial symmetry is target light power spectrum from the luminous power spectrum obtained；Parameter module is used for By the determining corresponding I of target light power spectrumphaseOr gain region temperature and the target light power spectrum in peak point institute The I of markDBRIn at least two parameters as adjust laser parameter.
In the first possible realization method of second aspect, the determining module, including：Computing unit, based on Calculate the symmetry value of each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2 It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is Along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is along IDBRAugment direction away from The mode hopping point nearest from the peak point that luminous power is composed；Determination unit, for that in each luminous power spectrum, will have minimum symmetrical The luminous power of value composes the target light power spectrum best as symmetry.
In conjunction with the possible realization method of the first of second aspect and second aspect, second in second aspect is possible In realization method, the acquisition module is specifically used in adjustable range, and I is adjusted by default step-lengthphaseOr the temperature of gain region Degree measures luminous power spectrum；It is composed for each luminous power measured, whether the luminous power spectrum measured described in judgement, which meets first, is sentenced Broken strip part, the second Rule of judgment and third Rule of judgment；If first Rule of judgment of luminous power spectrum satisfaction measured, second are sentenced Broken strip part and third Rule of judgment then compose the luminous power spectrum measured as the luminous power of the acquisition；If described measure Luminous power spectrum be unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition then stops measuring；Wherein, The luminous power for the emergent light that the peak point that first Rule of judgment is composed by luminous power indicates be more than first threshold, described first Threshold value is determined according to light loss of the light power and emergent light of laser in optical transmission chain；Described second judges item The luminous power absolute value of the difference of emergent light of the part between the first mode hopping point and the second mode hopping point be less than second threshold, described second Threshold value is that the isolation of the light loss and MUX in optical transmission chain according to the light power, emergent light of laser determines；Institute State the symmetry value that third Rule of judgment is luminous power spectrumLess than third threshold value, wherein IDBR1It is jumped for first The I that mould point is indicatedDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImThe I indicated by peak pointDBR, the third threshold value It is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation determine.
In conjunction with the first possible realization method of second aspect, in the third possible realization method of second aspect In, the computing unit is specifically used for calculating the symmetry value of each luminous power spectrumWherein, IDBR1It is The I that first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is that the peak point that the luminous power is composed is marked The I shownDBR；The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；Described 2 mode hopping points are along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；What the mode hopping point was indicated goes out The luminous power for penetrating light is more than the luminous power of emergent light that at least one consecutive points adjacent with the mode hopping point are indicated, and with institute The difference for stating the luminous power that consecutive points are indicated is more than the 4th threshold value；4th threshold value is the light power according to the laser It is determined with the isolation of the MUX.
In conjunction with the first possible realization method of second aspect, second aspect, second of possible reality of second aspect The third possible realization method of existing mode and second aspect, in the 4th kind of possible realization method of second aspect, institute Device is stated, further includes：
Sending module, for sending the parameter for adjusting laser.
In the 5th kind of possible realization method of second aspect, the sending module is specifically used for sending physical layer behaviour Make management and safeguards PLOAM message；The tune retained in Reserve fields or the PLOAM message in the PLOAM message Whole control Tuning Control fields carry the parameter for adjusting laser.
The third aspect provides a kind of optical network unit ONU, including：Laser, first part's speculum, second part reflection Mirror, wavelength division multiplexer MUX and photodiode PD, the laser by first part's speculum, the MUX and The second part speculum connection, the PD are connect with first part's speculum；The ONU further includes：Processor, It is connect with the PD and the laser；The laser, for being gone out in adjustable range according to the instruction of the processor Penetrate optical signal；The PD passes through first part's speculum and described for detecting the optical signal by the laser emitting MUX reaches second part speculum, is reflected by the second part speculum and reaches the first part by the MUX The reflected light of speculum obtains the luminous power of the reflected light, and the luminous power of the reflected light is sent to the processor；It is described Processor is used to indicate the laser in adjustable range, adjusts the phase region injection current I of the laserphaseOr The temperature of gain region obtains the luminous power spectrum of the laser, the dbr region of the luminous power spectrum indication laser Electric current IDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；Axis pair is determined from the luminous power spectrum obtained Property best luminous power spectrum be referred to as target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr the temperature of gain region The I that peak point is indicated in degree and the target light power spectrumDBRIn at least two parameters as adjust laser parameter.
In the first possible realization method in terms of third, the processor is from the luminous power spectrum obtained It determines that the best luminous power spectrum of axial symmetry is target light power spectrum, specifically includes：The processor calculates each luminous power The symmetry value of spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the second mode hopping point institute The I of markDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction away from The mode hopping point nearest from the peak point that luminous power is composed；The second mode hopping point is along IDBRAugment direction is apart from the peak that luminous power is composed The nearest mode hopping point of value point；The processor will compose conduct in each luminous power spectrum with the luminous power of minimum symmetry value The best target light power spectrum of symmetry.
In conjunction with the possible realization method of the first of the third aspect and the third aspect, second in the third aspect is possible In realization method, the processor indicates the laser in adjustable range, adjusts the phase region injection electricity of the laser Flow IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, is specifically included：The processor instruction is described to swash Light device adjusts I in adjustable range, by default step-lengthphaseOr the temperature of gain region, and indicate that the PD measurements are described anti- The luminous power for penetrating light measures luminous power spectrum；The processor is composed for each luminous power measured, the light measured described in judgement Whether power spectrum meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured is full The first Rule of judgment of foot, the second Rule of judgment and third Rule of judgment then regard the luminous power spectrum measured as the acquisition Luminous power spectrum；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and the light work(of the existing acquisition Rate is composed, then stops measuring；Wherein, the luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates More than first threshold, the first threshold is the light loss in optical transmission chain according to the light power and reflected light of laser Determining；The luminous power absolute value of the difference of reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point Less than second threshold, the second threshold is the light loss in optical transmission chain according to the light power, reflected light of laser It is determined with the isolation of MUX；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third Threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImFor peak point institute The I of markDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX Isolation determine.
In conjunction with the first possible realization method of the third aspect, in the third possible realization method of the third aspect In, the luminous power for the reflected light that the mode hopping point is indicated is indicated more than at least one consecutive points adjacent with the mode hopping point Reflected light luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is It is determined according to the isolation of the light power of the laser and the MUX.
In conjunction with the first possible realization method of the third aspect, the third aspect, second of possible reality of the third aspect The third possible realization method of existing mode and the third aspect, in the 4th kind of possible realization method of the third aspect, institute ONU is stated, further includes：Driving circuit；The driving circuit is connect with the processor and the laser, for according to The instruction of processor adjusts the phase region injection current I of the laser in adjustable rangephaseOr the temperature of gain region； The laser is emitted optical signal under the driving of the driving circuit.
Fourth aspect provides a kind of optical line terminal OLT, including：Laser, first part's speculum, second part reflection Mirror, wavelength division multiplexer MUX and photodiode PD, the laser by first part's speculum, the MUX and The second part speculum connection, the PD are connect with first part's speculum；The OLT further includes：Processor, It is connect with the PD and the laser；The laser, for being gone out in adjustable range according to the instruction of the processor Penetrate optical signal；The PD passes through first part's speculum and described for detecting the optical signal by the laser emitting MUX reaches second part speculum, is reflected by the second part speculum and reaches the first part by the MUX The reflected light of speculum obtains the luminous power of the reflected light, and the luminous power of the reflected light is sent to the processor；It is described Processor is used to indicate the laser in adjustable range, adjusts the phase region injection current I of the laserphaseOr The temperature of gain region obtains the luminous power spectrum of the laser, the dbr region of the luminous power spectrum indication laser Electric current IDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；Axis pair is determined from the luminous power spectrum obtained Property best luminous power spectrum be referred to as target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr the temperature of gain region The I that peak point is indicated in degree and the target light power spectrumDBRIn at least two parameters as adjust laser parameter.
In the first possible realization method of fourth aspect, the processor is true from the luminous power spectrum obtained The best luminous power spectrum of dead axle symmetry is target light power spectrum, is specifically included：The processor calculates each luminous power spectrum Symmetry valueWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is that the second mode hopping point is marked The I shownDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction distance The nearest mode hopping point of peak point of luminous power spectrum；The second mode hopping point is along IDBRThe peak value that augment direction is composed apart from luminous power The nearest mode hopping point of point；The processor, will be with the spectrum conduct pair of the luminous power of minimum symmetry value in each luminous power spectrum The best target light power spectrum of title property.
In conjunction with the possible realization method of the first of fourth aspect and fourth aspect, second in fourth aspect is possible In realization method, the processor indicates the laser in adjustable range, adjusts the phase region injection electricity of the laser Flow IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, is specifically included：The processor instruction is described to swash Light device adjusts I in adjustable range, by default step-lengthphaseOr the temperature of gain region, and indicate that the PD measurements are described anti- The luminous power for penetrating light measures luminous power spectrum；The processor is composed for each luminous power measured, the light measured described in judgement Whether power spectrum meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured is full The first Rule of judgment of foot, the second Rule of judgment and third Rule of judgment then regard the luminous power spectrum measured as the acquisition Luminous power spectrum；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and the light work(of the existing acquisition Rate is composed, then stops measuring；Wherein, the luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates More than first threshold, the first threshold is the light loss in optical transmission chain according to the light power and reflected light of laser Determining；The luminous power absolute value of the difference of reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point Less than second threshold, the second threshold is the light loss in optical transmission chain according to the light power, reflected light of laser It is determined with the isolation of MUX；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third Threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImFor peak point institute The I of markDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX Isolation determine.
In conjunction with the first possible realization method of fourth aspect, in the third possible realization method of fourth aspect Kind, the luminous power for the reflected light that the mode hopping point is indicated is indicated more than at least one consecutive points adjacent with the mode hopping point Reflected light luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is It is determined according to the isolation of the light power of the laser and the MUX.
In conjunction with the first possible realization method of fourth aspect, fourth aspect, second of possible reality of fourth aspect The third possible realization method of existing mode and fourth aspect, in the 4th kind of possible realization method of fourth aspect, institute OLT is stated, further includes：Driving circuit；The driving circuit is connect with the processor and the laser, for according to The instruction of processor adjusts the phase region injection current I of the laser in adjustable rangephaseOr the temperature of gain region； The laser is emitted optical signal under the driving of the driving circuit.
5th aspect provides a kind of optical line terminal OLT, including：Wavelength division multiplexer MUX, receiver, transmitter and Processor；The processor is connect with the receiver and the transmitter respectively；The receiver, for detecting by laser The optical signal being emitted obtains the luminous power of the transmitted light by the transmitted light of the MUX；The processor, for adjusting In adjusting range, indicate that the laser adjusts phase region injection current IphaseOr the temperature of gain region, obtain the laser Luminous power spectrum, the electric current I of the dbr region of luminous power spectrum indication laserDBRIt is obtained with the receiver saturating Penetrate the correspondence of the luminous power of light；Determine that the best luminous power spectrum of axial symmetry is target light work(from the luminous power spectrum obtained Rate is composed；By the determining corresponding I of target light power spectrumphaseOr gain region temperature and the target light power spectrum in peak The indicated I of value pointDBRAt least two parameters are as the parameter for adjusting laser；The transmitter swashs for sending described adjust The parameter of light device.
In the first possible realization method of the 5th aspect, the processor determines axis from the luminous power spectrum obtained The best luminous power spectrum of symmetry is target light power spectrum, is specifically included：The processor calculates pair of each luminous power spectrum Title valueWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is that the second mode hopping point is indicated IDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction apart from light work( The nearest mode hopping point of peak point of rate spectrum；The second mode hopping point is along IDBRThe peak point that augment direction is composed apart from luminous power is most Close mode hopping point；The processor will be used as symmetry in each luminous power spectrum with the luminous power of minimum symmetry value spectrum Best target light power spectrum.
In conjunction with the first possible realization method of the 5th aspect and the 5th aspect, second at the 5th aspect is possible In realization method, for the processor in adjustable range, indication laser adjusts phase region injection current IphaseOr gain region Temperature, obtain the laser luminous power spectrum, specifically include：The processor indicates the laser in adjustable range Device adjusts I by default step-lengthphaseOr the temperature of gain region, measure luminous power spectrum；The processor is measured for each Luminous power is composed, and whether the luminous power spectrum measured described in judgement, which meets the first Rule of judgment, the second Rule of judgment and third, judges item Part；If the luminous power spectrum measured meets first Rule of judgment, second Rule of judgment and the third Rule of judgment, Preserve the luminous power spectrum measured；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and existing described obtains The luminous power spectrum obtained, then stop measuring；Wherein, the transmitted light that the peak point that first Rule of judgment is composed by luminous power indicates Luminous power be more than first threshold, the first threshold is light power and transmitted light according to laser in optical transmission chain Light loss determine；The optical power difference of transmitted light of second Rule of judgment between the first mode hopping point and the second mode hopping point Absolute value be less than second threshold, the second threshold be according to the light power of laser, transmitted light in optical transmission chain Light loss and MUX isolation determine；The third Rule of judgment is the symmetry value of luminous power spectrum Less than third threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImFor The I that peak point is indicatedDBR, the third threshold value is light power according to laser, IDBRValue range, MUX channel What the isolation of bandwidth and MUX determined.
In conjunction with the first possible realization method of the 5th aspect, in the third possible realization method of the 5th aspect In, the luminous power for the reflected light that the mode hopping point is indicated is indicated more than at least one consecutive points adjacent with the mode hopping point Reflected light luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is It is determined according to the isolation of the light power of the laser and the MUX.
In conjunction with the 5th aspect, second of possible reality of the first possible realization method of the 5th aspect, the 5th aspect The third possible realization method of existing mode and the 5th aspect, in the 4th kind of possible realization method of the 5th aspect, institute It states transmitter and sends the parameter for adjusting laser, specifically include：The transmitter sends physical layer operations management and maintenance PLOAM message；The adjustment controller retained in Reserve fields or the PLOAM message in the PLOAM message Tuning Control fields carry the parameter for adjusting laser.
6th aspect is to provide a kind of passive optical network PON system, includes the optical line terminal as described in terms of the 5th OLT and optical network unit ONU；The OLT is connect with the ONU；The ONU is adjusted for the instruction according to the OLT The phase region injection current I of laserphaseOr the temperature of gain region；And receive the adjusting laser that the OLT is sent The parameter of device carries out wavelength alignment according to the parameter for adjusting laser.
The wavelength alignment methods and device of laser provided in an embodiment of the present invention, ONU, OLT and PON system, by In adjustable range, the I of laser is adjustedphaseOr the temperature of gain region, the luminous power spectrum for obtaining laser is measured, then from each Determine that the best luminous power spectrum of axial symmetry is target light power spectrum in luminous power spectrum, determining target light power spectrum is corresponding IphaseOr the I that peak point is indicated in the temperature and target light power spectrum of gain regionDBRAt least two parameters are as adjusting The parameter of laser determines to avoid the mapping table using laser parameter and outgoing light wavelength and adjusts laser Parameter reduces the cost of laser.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of DBR laser；
Fig. 2 is a kind of flow diagram of the wavelength alignment methods for laser that first embodiment of the invention provides；
Fig. 3 is the index path of reflected light；
Fig. 4 is a kind of structural schematic diagram of the wavelength alignment device for laser that second embodiment of the invention provides；
Fig. 5 is a kind of structural schematic diagram for ONU that third embodiment of the invention provides；
Fig. 6 is the structural schematic diagram for the OLT that four embodiment of the invention provides；
Fig. 7 is a kind of flow diagram of the wavelength alignment methods for laser that fifth embodiment of the invention provides；
Fig. 8 is a kind of structural schematic diagram of the wavelength alignment device for laser that sixth embodiment of the invention provides；
Fig. 9 is a kind of structural schematic diagram for OLT 90 that seventh embodiment of the invention provides；
Figure 10 is the structural schematic diagram for the PON system that eighth embodiment of the invention provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
DBR laser is a kind of tunable laser, includes the gain region for being emitted light wave, along the anti-of gain region light extraction Direction is disposed with phase-shifted region and the areas DBR, and Fig. 1 is the structural schematic diagram of DBR laser, as shown in Figure 1, including：Gain region, Phase-shifted region and the areas DBR, wherein the areas DBR include DBR gratings, for carrying out DBR reflections by the dephased light wave of phase-shifted region. DBR laser can not only utilize IphaseAnd IDBRThe wavelength of the two parameter regulation DBR laser emergent lights；In the process of realization In for simplicity, also using adjust gain region temperature and IDBRThe wavelength of the two parameter regulation DBR laser emergent lights, To carry out wavelength alignment, that is to say, that so that the wavelength of the emergent light of laser and the passband of MUX match.Following implementation Laser mentioned in example all can be DBR laser.
Luminous power spectrum mentioned in following embodiment is used to the I of indication laserDBRWith the emergent light of laser The correspondence of luminous power.
Specifically, the emergent light can pass through a part of speculum and MUX, arrival second by the optical signal that laser is emitted Partially reflecting mirror is reflected by second part speculum and reaches first part's speculum, the reflected light of acquisition by MUX；Using Embodiment can be found in following one embodiment, second embodiment, third embodiment and the 4th embodiment.
Alternatively, specifically, the emergent light can pass through MUX, the transmitted light of acquisition by the optical signal that laser is emitted；Using Embodiment is referring to following 5th embodiments, the 6th embodiment, the 7th embodiment and the 8th embodiment.
Fig. 2 is a kind of flow diagram of the wavelength alignment methods for laser that first embodiment of the invention provides, this Method in embodiment can be implemented by ONU, to carry out wavelength alignment to the laser in ONU, can also be implemented by OLT, with Wavelength alignment is carried out to the laser in OLT, as shown in Fig. 2, the present embodiment may include：
201, in adjustable range, the I of laser is adjustedphaseOr the temperature of gain region, obtain the luminous power of laser Spectrum.
Wherein, luminous power spectrum is established in two-dimensional Cartesian coordinate system, and horizontal axis indicates DBR area Injection Current IDBR, longitudinal axis mark The luminous power of reflected light is used to indicate the areas the DBR Injection Current I that horizontal axis is indicatedDBRThe light work(of the reflected light indicated with the longitudinal axis Correspondence between rate.Wherein, reflected light, be the DBR laser emergent light in penetrate MUX part, by part Speculum reflection obtains, specifically, Fig. 3 is the index path of reflected light, as shown in figure 3, laser 30 is anti-by first part It penetrates mirror 31, MUX 33 and second part speculum 32 to connect, photodiode (Photodiode, PD) 34 is reflected with first part Mirror 31 connects, and the emergent light of laser 30 reaches second part speculum 32 by first part's speculum 31 and MUX 33, by Second part speculum 32 reflects and reaches first part's speculum 31 by MUX 33, is detected by PD 34 and obtains reflected light.The A part of speculum 31 can be polarization beam apparatus (PBS, Polarization Beam splitter) or light splitting piece etc.；The Two partially reflecting mirrors 32 can be faraday rotator mirror (FRM, Faraday Rotation Mirror) etc.；MUX can be Array waveguide grating (Array Wave Grating, AWG).
Optionally, in the I of laserphaseOr in the adjustable extent of the temperature of gain region, to IphaseOr gain region Temperature is adjusted by the way of gradually increasing or being gradually reduced according to default step-length, is measured and is obtained each IphaseOr The corresponding luminous power spectrum of temperature of person gain region.
Alternatively, it is optional, row step A and step B are repeated, until the luminous power spectrum measured is unsatisfactory for described first and sentences Broken strip part, and the luminous power spectrum of the existing acquisition, then stop measuring：
Step A, in adjustable range, to IphaseEither the temperature of gain region is using the side for gradually increasing or being gradually reduced Formula is adjusted according to default step-length, measures current IphaseOr the corresponding luminous power spectrum of temperature of gain region；
Whether luminous power spectrum step B, measured described in judgement, which meets the first Rule of judgment, the second Rule of judgment and third, is sentenced Broken strip part；If the luminous power spectrum measured meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment, by institute The luminous power spectrum measured is stated to compose as the luminous power of the acquisition.
Wherein, the luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates is more than first Threshold value, the first threshold are determined according to light loss of the light power and reflected light of laser in optical transmission chain； The luminous power absolute value of the difference of reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than the Two threshold values, the second threshold are the light loss and MUX in optical transmission chain according to the light power, reflected light of laser What isolation determined；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.The first Rule of judgment, the second Rule of judgment and third Rule of judgment pair are utilized during obtaining luminous power spectrum Luminous power spectrum is screened, when to screen the luminous power time spectrum for meeting above three condition and the current luminous power for testing acquisition Time spectrum stops test, to accelerate to obtain the progress of luminous power spectrum.
202, determine that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum.
Optionally, according to the power spectral coverage phase in each luminous power spectrum between the first mode hopping point and the second mode hopping point For the axial symmetry of the longitudinal axis by peak point, the best target light power spectrum of symmetry is determined.Wherein, the first mode hopping point is Along IDBRReduce the nearest mode hopping point of the peak point composed apart from the luminous power of direction；The second mode hopping point is along IDBRIncrease side To the mode hopping point nearest apart from the peak point.Mode hopping point meet the reflected light that it is indicated luminous power be more than it is at least one with The luminous power for the reflected light that the adjacent consecutive points of the mode hopping point are indicated, and and the difference of luminous power that is indicated of the consecutive points More than the 4th threshold value, wherein the 4th threshold value is determined according to the light power of the DBR laser and the isolation of MUX, Such as：It is 8dB to take the 4th threshold value.Interval between the main mould and side mould of three-stage DBR laser is generally more than the channel band of MUX Width, when main mould is located near MUX bandwidth chahnels, side mould can be fallen except bandwidth chahnel, and at this time as mode hopping occurs, then side mould is saturating It is very low to cross rate, can detect apparent luminous power mutation, generally tens of dB variations, therefore clearly can detect first Mode hopping point O1, the second mode hopping point O2Position, the central point 0 between two mode hopping points is generally side mode suppression ratio (Side Mode Suppression Ratio, SMSR) maximum place.Specifically, according to the symmetry value for calculating each luminous power obtained spectrumIn each luminous power spectrum, by with the luminous power of minimum symmetry value spectrum as symmetry most preferably Target light power spectrum.Wherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is The I that peak point is indicatedDBR.Determine that mode hopping point may make the laser after wavelength alignment to have higher SMSR using which.
203, by the determining corresponding I of target light power spectrumphaseOr temperature and the target luminous power of gain region The I that peak point is indicated in spectrumDBRAt least two parameters are as the parameter for adjusting laser.
Specifically, when will measure the target light power spectrum laser IphaseOr gain section temperature, Yi Jisuo State the I that peak point is indicated in target light power spectrumDBRAs the parameter for adjusting laser, to realize that the wavelength of laser is aligned.
Further, after 203, the laser after being also aligned to wavelength carries out transmitting eye pattern extinction ratio adjustment.Specifically , laser is worked normally, it is also necessary to emit it eye pattern extinction ratio (Extinction Ratio, ER) and adjust online It is whole, such as：Laser driver (LDD, LD Driver) with extinction ratio monitoring with adjustment function, after giving ER values, LDD ER can be adjusted to setting value.Alternatively, in another example：Laser is completed after the alignment of line wavelength, is sent and is indicated with certain frequency The emergent light of a string " 1 " and " 0 " signal, while monitoring and indicating respectively " 1 " and " 0 " through faraday rotator mirror is reflected Emergent light luminous power P1And P0, then ER=10lg (P1/P0) (dB), you can by the modulation and biasing that change DBR laser Electric current adjusts ER." 1 " and " 0 " that a string are sent with certain frequency, is to more accurately measure ER.
Further, before 201, may also include：Factory testing is carried out to laser.If specifically, the gain of laser The temperature value range in area is (T1, T2), general 0 ＜ T2-T1＜ 10, IphaseValue range is (IP1, IP2), IDBRValue range For (ID1, ID2), wherein T1＜ T2, IP1＜ IP2, ID1＜ ID2, then it is T in the temperature of the gain region of the laser2, IDBRFor ID1 Under conditions of, by IphaseIt is adjusted, the side mode suppression ratio for obtaining the emergent light for meeting laser is more than the 5th threshold value First emergent light, such as：It is 35dB to take the 5th threshold value；It is T in the operating temperature of the laser2, IDBRFor ID2Under conditions of, lead to It crosses to IphaseIt is adjusted, the side mode suppression ratio for obtaining the emergent light for meeting laser is more than the second outgoing of the 5th threshold value Light；It is P=min (P to calculate and obtain the light power of the laser1, P2)；Wherein, P1For the light work(of first emergent light Rate, P2For the luminous power of second emergent light；The light power of the laser is for determining the first threshold, described the Two threshold values and the third threshold value.Then, it is T in the operating temperature of the laser1, IDBRFor ID1Under conditions of, by right IphaseIt is adjusted, the side mode suppression ratio for obtaining the emergent light for meeting laser is more than the third emergent light of the 5th threshold value； It is T in the operating temperature of the laser1, IDBRFor ID2Under conditions of, by IphaseIt is adjusted, changes the laser Emergent light wavelength, obtain meet laser emergent light side mode suppression ratio be more than the 5th threshold value the 4th outgoing Light；According to formula Δ λ=max (Δ λ1, Δ λ2), it is calculated, wherein Δ λ1=| λ1-λ2| corresponding wavelength adjustable extent (λ1, λ2), Δ λ2=| λ3-λ4| corresponding wavelength adjustable extent (λ3, λ4), using the Wavelength tunable range corresponding to Δ λ as the laser The Wavelength tunable range of the emergent light of device；λ1For the wavelength of first emergent light, λ2For the wavelength of second emergent light, λ3 For the wavelength of the third emergent light, λ4For the wavelength of the 4th emergent light；Determine the wavelength of the emergent light of the laser Adjustable extent covers the bandwidth chahnel of the MUX.Due to during factory testing, it is only necessary to the light extraction work(of DBR laser Rate, DBR laser emergent light Wavelength tunable range and gain section temperature value range, IphaseValue range and IDBRIt takes Value range etc. is detected, without testing the mapping table for obtaining DBR laser parameter and outgoing light wavelength, to reduce DBR laser dispatches from the factory the testing time, reduces the cost of DBR laser.
It should be noted that before laser and MUX are used cooperatively, it should be determined that the emergent light of the laser Wavelength tunable range can cover the bandwidth chahnel in whole channels in the MUX, that is to say, that determine that laser is matched with MUX.
The wavelength alignment methods of laser provided in an embodiment of the present invention, by adjustable range, adjusting laser IphaseOr the temperature of gain region, the luminous power spectrum for obtaining laser is measured, then determines axial symmetry from each luminous power spectrum Best luminous power spectrum is target light power spectrum, by the determining corresponding I of target light power spectrumphaseOr the temperature of gain region, And the I that peak point is indicated in target light power spectrumDBRAt least two parameters are as the parameter for adjusting laser, to avoid Using the mapping table of laser parameter and outgoing light wavelength, determine the parameter for adjusting laser, reduce laser at This.
Fig. 4 is a kind of structural schematic diagram of the wavelength alignment device for laser that second embodiment of the invention provides, this The wavelength alignment device that embodiment is provided may be disposed in OLT, carries out wavelength alignment to the laser in OLT, can also be arranged In ONU, wavelength alignment is carried out to the laser in ONU, the wavelength alignment device of the laser in the present embodiment, including：It obtains Obtain module 41, determining module 42 and parameter module 43.
Module 41 is obtained, in adjustable range, adjusting the phase region injection current I of laserphaseOr gain region Temperature, obtain the laser luminous power spectrum.
Wherein, the electric current I of the dbr region of luminous power spectrum indication laserDBRWith the light work(of the reflected light of laser The correspondence of rate；The reflected light is the emergent light by the laser by first part's speculum and the MUX, The second part speculum is reached, reflected by the second part speculum and the first part is reached by the MUX Speculum, it is detected by the PD.
Optionally, module 41 is obtained, is specifically used in adjustable range, I is adjusted by default step-lengthphaseOr gain region Temperature measures luminous power spectrum；For the luminous power spectrum that each is measured, whether the luminous power spectrum measured described in judgement meets first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets the first Rule of judgment, second Rule of judgment and third Rule of judgment then compose the luminous power spectrum measured as the luminous power of the acquisition；If the survey The luminous power spectrum obtained is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；Its In, the luminous power for the reflected light that peak point that first Rule of judgment is composed by luminous power indicates is more than first threshold, described First threshold is determined according to light loss of the light power and reflected light of laser in optical transmission chain；Described second sentences The luminous power absolute value of the difference of reflected light of the broken strip part between the first mode hopping point and the second mode hopping point is less than second threshold, described Second threshold is that the isolation of the light loss and MUX in optical transmission chain according to the light power, reflected light of laser determines 's；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, wherein IDBR1It is The I that 1 mode hopping point is indicatedDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImThe I indicated by peak pointDBR, the third Threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation determine.
Determining module 42 is connect with module 41 is obtained, best for determining axial symmetry in being composed from the luminous power obtained Luminous power spectrum is target light power spectrum.
Optionally, determining module may include：Computing unit, the symmetry value for calculating each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction to compose apart from luminous power The nearest mode hopping point of peak point；The second mode hopping point is along IDBRPeak point that augment direction is composed apart from luminous power is nearest Mode hopping point；Determination unit, in each luminous power spectrum, symmetry will to be used as most with the luminous power of minimum symmetry value spectrum Good target light power spectrum.Wherein, the luminous power for the reflected light that mode hopping point is indicated is more than at least one with the mode hopping point phase The luminous power for the reflected light that adjacent consecutive points are indicated, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold Value；4th threshold value is determined according to the light power of the laser and the isolation of the MUX.
Parameter module 43 is connect with determining module 42, the corresponding I of target light power spectrum for will determinephaseOr increase The I that peak point is indicated in the temperature in beneficial area and the target light power spectrumDBRIn at least two parameters as adjust laser The parameter of device.
Each function module of the wavelength alignment device of laser provided in this embodiment is for executing shown in first embodiment Laser wavelength alignment methods, concrete operating principle repeats no more, and refers to the description of embodiment of the method.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Fig. 5 is a kind of structural schematic diagram for ONU that third embodiment of the invention provides, including：51, first, laser It further includes processor 56 to divide speculum 52, second part speculum 53, MUX 54 and PD 55, ONU.
Laser 51 is connected by first part's speculum 52, the MUX 54 and the second part speculum 53 It connects, the PD 55 is connect with first part's speculum 52, and processor 56 is connect with the PD 55 and the laser 51. Wherein, the connection between processor 56 and PD 55 and the laser 51 is to be electrically connected；Laser 51 passes through the first part Connection and the PD 55 between speculum 52, the MUX 54 and the second part speculum 53 with described first The connection divided between speculum 52 is light connects, and in Fig. 5, solid line is electrical connection, and solid arrow line is light connects, and arrow direction is Optical propagation direction.
The laser 51 in adjustable range, is emitted optical signal for the instruction according to the processor 56.
The PD 55 is emitted for detecting by the laser 51, by first part's speculum 52 and described MUX 54 reaches second part speculum 53, is reflected by the second part speculum 53 and reaches institute by the MUX 54 The reflected light for stating first part's speculum 52 obtains the luminous power of the reflected light.
The processor 56 is used to indicate the laser 51 in adjustable range, adjusts the phase region of the laser Injection Current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, the luminous power composes indication laser Dbr region electric current IDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；From the light obtained Determine that the best luminous power spectrum of axial symmetry is target light power spectrum in power spectrum；Determining target light power spectrum is corresponding IphaseOr gain region temperature and the target light power spectrum in the I that is indicated of peak pointDBRIn at least two parameters make To adjust the parameter of laser.
Further, processor 56 indicates the laser in adjustable range, adjusts the phase region injection of the laser Electric current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, is specifically included：The processor 56 indicates institute Laser is stated in adjustable range, I is adjusted by default step-lengthphaseOr the temperature of gain region, and instruction PD measurements institute The luminous power for stating reflected light measures luminous power spectrum；The luminous power spectrum that the processor 56 is measured for each, judges the survey Whether the luminous power spectrum obtained meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the light work(measured Rate spectrum meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment, then regard the luminous power spectrum measured as institute State the luminous power spectrum of acquisition；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and the existing acquisition Luminous power spectrum, then stop measuring；Wherein, the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates Luminous power is more than first threshold, and the first threshold is light power and reflected light according to laser in optical transmission chain What light loss determined；The optical power difference of reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point Absolute value is less than second threshold, the second threshold be according to the light power of laser, reflected light in optical transmission chain What the isolation of light loss and MUX determined；The third Rule of judgment is the symmetry value of luminous power spectrumIt is small In third threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImFor peak The indicated I of value pointDBR, the third threshold value is light power according to laser, IDBRValue range, MUX channel band What wide and MUX isolation determined.
Further, processor 56 determines that the best luminous power spectrum of axial symmetry is target from the luminous power spectrum obtained Luminous power is composed, and is specifically included：The processor 56 calculates the symmetry value of each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the peak value of the luminous power spectrum The indicated I of pointDBR；The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction； The second mode hopping point is along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；The processor 56 exists In each luminous power spectrum, the target light power spectrum best as symmetry will be composed with the luminous power of minimum symmetry value.Mode hopping The luminous power of the indicated reflected light of point is more than the reflected light that at least one consecutive points adjacent with the mode hopping point are indicated Luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is swashed according to described What the isolation of the light power of light device and the MUX determined.
Further, ONU can also include driving circuit, the driving circuit and the processor 56 and the laser 51 Connection, for adjusting the phase region injection current of the laser 51 in adjustable range according to the instruction of the processor 56 IphaseOr the temperature of gain region.
Each function module of ONU provided in this embodiment can be used for executing the wavelength of laser shown in one embodiment Alignment methods, concrete operating principle repeat no more, and refer to the description of embodiment of the method.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Fig. 6 is the structural schematic diagram for the OLT that four embodiment of the invention provides, as shown in fig. 6, in the present embodiment OLT, including：Laser 61, first part's speculum 62, second part speculum 63, MUX 64 and PD 65, OLT further include place Manage device 66.
Laser 61 is connected by first part's speculum 62, the MUX 64 and the second part speculum 63 It connects, the PD 65 is connect with first part's speculum 62, and processor 66 is connect with the PD 65 and the laser 61. Wherein, the connection between processor 66 and PD 65 and the laser 61 is to be electrically connected；Laser 61 passes through the first part Connection and the PD 65 between speculum 62, the MUX 64 and the second part speculum 63 with described first The connection divided between speculum 62 is light connects, and in Fig. 6, solid line is electrical connection, and solid arrow line is light connects, and arrow direction is Optical propagation direction.
The laser 61 in adjustable range, is emitted optical signal for the instruction according to the processor 66.
The PD 65 is emitted for detecting by the laser 61, by first part's speculum 62 and described MUX 64 reaches second part speculum 63, is reflected by the second part speculum 63 and reaches institute by the MUX 64 The reflected light for stating first part's speculum 62 obtains the luminous power of the reflected light.
The processor 66 is used to indicate the laser 61 in adjustable range, adjusts the phase region of the laser Injection Current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, the luminous power composes indication laser Dbr region electric current IDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；From the light obtained Determine that the best luminous power spectrum of axial symmetry is target light power spectrum in power spectrum；Determining target light power spectrum is corresponding IphaseOr gain region temperature and the target light power spectrum in the I that is indicated of peak pointDBRIn at least two parameters make To adjust the parameter of laser.
Further, processor 66 indicates the laser in adjustable range, adjusts the phase region injection of the laser Electric current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, is specifically included：The processor 66 indicates institute Laser is stated in adjustable range, I is adjusted by default step-lengthphaseOr the temperature of gain region, and instruction PD measurements institute The luminous power for stating reflected light measures luminous power spectrum；The luminous power spectrum that the processor 66 is measured for each, judges the survey Whether the luminous power spectrum obtained meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the light work(measured Rate spectrum meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment, then regard the luminous power spectrum measured as institute State the luminous power spectrum of acquisition；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and the existing acquisition Luminous power spectrum, then stop measuring；Wherein, the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates Luminous power is more than first threshold, and the first threshold is light power and reflected light according to laser in optical transmission chain What light loss determined；The optical power difference of reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point Absolute value is less than second threshold, the second threshold be according to the light power of laser, reflected light in optical transmission chain What the isolation of light loss and MUX determined；The third Rule of judgment is the symmetry value of luminous power spectrumIt is small In third threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImFor peak The indicated I of value pointDBR, the third threshold value is light power according to laser, IDBRValue range, MUX channel band What wide and MUX isolation determined.
Further, processor 66 determines that the best luminous power spectrum of axial symmetry is target from the luminous power spectrum obtained Luminous power is composed, and is specifically included：The processor 56 calculates the symmetry value of each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the peak value of the luminous power spectrum The indicated I of pointDBR；The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction； The second mode hopping point is along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；The processor 56 exists In each luminous power spectrum, the target light power spectrum best as symmetry will be composed with the luminous power of minimum symmetry value.Mode hopping The luminous power of the indicated reflected light of point is more than the reflected light that at least one consecutive points adjacent with the mode hopping point are indicated Luminous power, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold value is swashed according to described What the isolation of the light power of light device and the MUX determined.
Further, OLT can also include driving circuit, the driving circuit and the processor 66 and the laser 61 Connection, for adjusting the phase region injection current of the laser 61 in adjustable range according to the instruction of the processor 66 IphaseOr the temperature of gain region.
Each function module of OLT provided in this embodiment can be used for executing the wavelength of laser shown in one embodiment Alignment methods, concrete operating principle repeat no more, and refer to the description of embodiment of the method.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Fig. 7 is a kind of flow diagram of the wavelength alignment methods for laser that fifth embodiment of the invention provides, this The wavelength alignment methods of laser in embodiment, can be implemented by OLT, and wavelength alignment, the laser are carried out to the laser in ONU Device is connect by MUX with optical line terminal OLT, and the emergent light of the laser reaches the OLT, by described by the MUX OLT detections obtain transmitted light, as shown in fig. 7, comprises：
701, in adjustable range, indication laser adjusts phase region injection current IphaseOr the temperature of gain region, it obtains Obtain the luminous power spectrum of the laser.
Wherein, the electric current I of the dbr region of luminous power spectrum indication laserDBRWith the luminous power of the transmitted light Correspondence.
Optionally, in adjustable range, indicate that the laser adjusts I by default step-lengthphaseOr the temperature of gain region, Measure luminous power spectrum；For the luminous power spectrum that each is measured, whether the luminous power spectrum measured described in judgement meets the first judgement Condition, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets first Rule of judgment, described second Rule of judgment and the third Rule of judgment then preserve the luminous power spectrum measured；If the luminous power spectrum measured is unsatisfactory for institute The first Rule of judgment, and the luminous power spectrum of the existing acquisition are stated, then stops measuring.Wherein, first Rule of judgment is The luminous power for the transmitted light that the peak point of luminous power spectrum is indicated is more than first threshold, and the first threshold is according to laser What the light loss of light power and transmitted light in optical transmission chain determined；Second Rule of judgment is the first mode hopping point and the The luminous power absolute value of the difference of transmitted light between 2 mode hopping points is less than second threshold, and the second threshold is according to laser What the isolation of the light loss and MUX of light power, transmitted light in optical transmission chain determined；The third Rule of judgment is light The symmetry value of power spectrumLess than third threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImThe I indicated by peak pointDBR, the third threshold value is going out according to laser Luminous power, IDBRValue range, MUX bandwidth chahnel and MUX isolation determine.
702, determine that the best luminous power spectrum of axial symmetry is target light power spectrum from the luminous power spectrum obtained.
Optionally, the symmetry value of each luminous power spectrum is calculatedWherein, IDBR1It is the first mode hopping point The I indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；Institute It is along I to state the first mode hopping pointDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is Along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；In each luminous power spectrum, it is minimum right to have The luminous power of title value composes the target light power spectrum best as symmetry.Wherein, the luminous power for the reflected light that mode hopping point is indicated More than the luminous power for the reflected light that at least one consecutive points adjacent with the mode hopping point are indicated, and marked with the consecutive points The difference for the luminous power shown is more than the 4th threshold value；4th threshold value is light power and the MUX according to the laser What isolation determined.
703, by the determining corresponding I of target light power spectrumphaseOr temperature and the target luminous power of gain region The I that peak point is indicated in spectrumDBRAt least two parameters are as the parameter for adjusting laser.
704, the parameter for adjusting laser is sent.
Optionally, send physical layer operations management and safeguard (Physical Layer Operations, Administration and Maintenance, PLOAM) message；Reservation (Reserve) field in the PLOAM message Or adjustment control (Tuning Control) field in the PLOAM message carries the parameter for adjusting laser.With Make ONU according to the parameter for adjusting laser, wavelength alignment is carried out to the laser in ONU.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Fig. 8 is a kind of structural schematic diagram of the wavelength alignment device for laser that sixth embodiment of the invention provides, this The wavelength alignment device of laser in embodiment is set in OLT, wavelength alignment is carried out to the laser in ONU, such as Fig. 8 institutes Show, the wavelength alignment device of laser includes：Obtain module 81, determining module 82, parameter module 83 and sending module 84.
Module 81 is obtained, in adjustable range, indication laser to adjust phase region injection current IphaseOr gain The temperature in area obtains the luminous power spectrum of the laser.
Wherein, the electric current I of the dbr region of luminous power spectrum indication laserDBRWith the luminous power of the transmitted light Correspondence；The emergent light that the transmitted light is disposed on the laser in optical network unit ONU is multiple by wavelength division multiplex With device MUX, optical line terminal OLT is reached, it is detected by the OLT.
Optionally, module 81 is obtained, is specifically used in adjustable range, indicates that the laser is adjusted by default step-length IphaseOr the temperature of gain region, measure luminous power spectrum；It is composed for each luminous power measured, the light work(measured described in judgement Whether rate spectrum meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；Described in if the luminous power spectrum measured meets First Rule of judgment, second Rule of judgment and the third Rule of judgment then preserve the luminous power spectrum measured；If the survey The luminous power spectrum obtained is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；Its In, the luminous power for the transmitted light that peak point that first Rule of judgment is composed by luminous power indicates is more than first threshold, described First threshold is determined according to light loss of the light power and transmitted light of laser in optical transmission chain；Described second sentences The luminous power absolute value of the difference of transmitted light of the broken strip part between the first mode hopping point and the second mode hopping point is less than second threshold, described Second threshold is that the isolation of the light loss and MUX in optical transmission chain according to the light power, transmitted light of laser determines 's；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, wherein IDBR1For The I that first mode hopping point is indicatedDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImThe I indicated by peak pointDBR, described Three threshold values are light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation determine.
Determining module 82 is connect with module 81 is obtained, best for determining axial symmetry in being composed from the luminous power obtained Luminous power spectrum is target light power spectrum.
Optionally, determining module may include：Computing unit, the symmetry value for calculating each luminous power spectrumWherein, IDBR1It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；The first mode hopping point is along IDBRReduce direction to compose apart from luminous power The nearest mode hopping point of peak point；The second mode hopping point is along IDBRPeak point that augment direction is composed apart from luminous power is nearest The luminous power of mode hopping point, the reflected light that the mode hopping point is indicated is more than at least one consecutive points institute adjacent with the mode hopping point The luminous power of the reflected light of mark, and and the difference of luminous power that is indicated of the consecutive points be more than the 4th threshold value；4th threshold Value is determined according to the light power of the laser and the isolation of the MUX.Determining module can also include determining list Member, in each luminous power spectrum, the target light work(best as symmetry will to be composed with the luminous power of minimum symmetry value Rate is composed.
Parameter module 83 is connect with determining module 82, the corresponding I of target light power spectrum for will determinephaseOr increase The I that peak point is indicated in the temperature in beneficial area and the target light power spectrumDBRAt least two parameters are as adjusting laser Parameter.
Sending module 84 is connect with parameter module 83, for sending the parameter for adjusting laser.
Optionally, sending module 84 is specifically used for sending PLOAM message；Reserve fields in the PLOAM message or Tuning Control fields in PLOAM message described in person carry the parameter for adjusting laser.
Each function module of the wavelength alignment device of laser provided in this embodiment can be used for executing the 5th embodiment Laser wavelength alignment methods flow, concrete operating principle repeats no more, and refers to the description of embodiment of the method.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Fig. 9 is a kind of structural schematic diagram for OLT 90 that seventh embodiment of the invention provides, as shown in figure 9, this implementation OLT 90 in example is used to carry out wavelength alignment to the laser in ONU, including：MUX 91, receiver 92, transmitter 93 and place Manage device 94.
MUX 91 is connect with receiver 92, and processor 94 is connect with the receiver 92 and the transmitter 93 respectively.Its In, connection between MUX 91 and receiver 92 is light connects, processor 94 respectively with the receiver 92 and the transmitter Connection between 93 is electrical connection, as shown in figure 9, solid line is electrical connection, solid arrow line is light connects, and arrow direction is light propagation Direction.
The receiver 92 is emitted by laser for detecting, by the transmitted light of the MUX, obtains the transmission The luminous power of light.
The processor 94, in adjustable range, indicating that the laser adjusts phase region injection current IphaseOr The temperature of person gain region obtains the luminous power spectrum of the laser, the dbr region of the luminous power spectrum indication laser Electric current IDBRThe correspondence of the luminous power of the transmitted light obtained with the receiver；Axis is determined from the luminous power spectrum obtained The best luminous power spectrum of symmetry is target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr gain region The I that peak point is indicated in temperature and the target light power spectrumDBRAt least two parameters are as the parameter for adjusting laser.
The transmitter 93, for sending the parameter for adjusting laser.
Further, for processor 94 in adjustable range, indication laser adjusts phase region injection current IphaseOr gain The temperature in area obtains the luminous power spectrum of the laser, specifically includes：The processor 94 is in adjustable range, described in instruction Laser adjusts I by default step-lengthphaseOr the temperature of gain region, measure luminous power spectrum；The processor 94 is directed to each The luminous power measured is composed, and whether the luminous power spectrum measured described in judgement meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets first Rule of judgment, second Rule of judgment and the third and judges Condition then preserves the luminous power spectrum measured；If the luminous power spectrum measured is unsatisfactory for first Rule of judgment, and existing The luminous power of the acquisition is composed, then stops measuring；Wherein, what the peak point that first Rule of judgment is composed by luminous power indicated The luminous power of transmitted light is more than first threshold, and the first threshold is light power and transmitted light according to laser in optical transport What the light loss in link determined；The light of transmitted light of second Rule of judgment between the first mode hopping point and the second mode hopping point Power absolute value of the difference is less than second threshold, and the second threshold is according to the light power of laser, transmitted light in optical transport What the isolation of light loss and MUX in link determined；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, wherein IDBR1The I indicated by the first mode hopping pointDBR, IDBR2For the second mode hopping point The I indicatedDBR, ImThe I indicated by peak pointDBR, the third threshold value is light power according to laser, IDBRTake It is worth the isolation determination of range, the bandwidth chahnel of MUX and MUX.
Further, processor 94 determines that the best luminous power spectrum of axial symmetry is target light work(from the luminous power spectrum obtained Rate is composed, and is specifically included：The processor 94 calculates the symmetry value of each luminous power spectrumWherein, IDBR1 It is the I that the first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the peak point institute of the luminous power spectrum The I of markDBR；The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；It is described Second mode hopping point is along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed, what the mode hopping point was indicated The luminous power of reflected light is more than the luminous power of reflected light that at least one consecutive points adjacent with the mode hopping point are indicated, and with The difference for the luminous power that the consecutive points are indicated is more than the 4th threshold value；4th threshold value is the light extraction work(according to the laser What the isolation of rate and the MUX determined.；The processor 94, will be with minimum symmetry value in each luminous power spectrum Luminous power composes the target light power spectrum best as symmetry.
Further, the transmitter 93 sends the parameter for adjusting laser, specifically includes：Transmitter 93 is sent PLOAM message；The Tuning Control fields in Reserve fields or the PLOAM message in the PLOAM message Carry the parameter for adjusting laser.
Each function module of OLT provided in this embodiment can be used for executing the wavelength alignment of the laser of the 5th embodiment Method flow, concrete operating principle repeat no more, and refer to the description of embodiment of the method.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
Figure 10 is the structural schematic diagram for the PON system that eighth embodiment of the invention provides, as shown in Figure 10, the present embodiment In PON system may include：OLT 90 and ONU 10, in the present embodiment, OLT 90 carry out the laser in ONU 10 Wavelength is aligned, and the OLT 90 is connect with the ONU 10, and in the present embodiment, OLT 90 is connected with ONU 10 especially by MUX.
OLT 90, in adjustable range, instruction ONU 10 to adjust the phase region injection current I of laserphaseOr The temperature of gain region obtains the luminous power spectrum of the laser, the dbr region of the luminous power spectrum indication laser Electric current IDBRWith the correspondence of the luminous power of the transmitted light；The best light of axial symmetry is determined from the luminous power spectrum obtained Power spectrum is target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr the temperature of gain region and described The I that peak point is indicated in target light power spectrumDBRAt least two parameters are as the parameter for adjusting laser；Send the adjusting The parameter of laser.
It should be noted that the OLT 90 in the present embodiment specifically executes the wavelength alignment of the laser of the 5th embodiment Method flow, concrete operating principle repeat no more, and refer to the description of embodiment of the method.
ONU 10 is connect with OLT 90, for the instruction according to the OLT 90, adjusts the phase region injection electricity of laser Flow IphaseOr the temperature of gain region；And the parameter for the adjusting laser that the OLT 90 is sent is received, according to described The parameter for adjusting laser carries out wavelength alignment.That is, the parameter of laser is adjusted to the adjusting laser received by OLT90 The parameter of device, to realize that wavelength is aligned.
In the present embodiment, by the I in adjustable range, adjusting laserphaseOr the temperature of gain region, it measures and obtains The luminous power of laser is composed, and then determines that the best luminous power spectrum of axial symmetry is target light power spectrum from each luminous power spectrum, By the determining corresponding I of target light power spectrumphaseOr peak point is indicated in the temperature and target light power spectrum of gain region IDBRAt least two parameters are as the parameter for adjusting laser, to avoid reflecting using laser parameter and outgoing light wavelength Relation table is penetrated, the parameter for adjusting laser is determined, reduces the cost of laser.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above method embodiment can pass through The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer read/write memory medium, the program When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or light The various media that can store program code such as disk.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (28)

1. a kind of wavelength alignment methods of laser, which is characterized in that the method includes：
In adjustable range, the phase region injection current I of laser is adjustedphaseOr the temperature of gain region, obtain the laser The luminous power of device is composed, the electric current I of the dbr region of the luminous power spectrum indication laserDBRWith the emergent light of laser The correspondence of luminous power；The emergent light passes through first part's speculum and wavelength-division by the optical signal that the laser is emitted Multiplexer MUX reaches second part speculum, is reflected by the second part speculum and reaches institute by the MUX State first part's speculum, the reflected light of acquisition；Alternatively, the optical signal that the emergent light is emitted by the laser passes through institute State MUX, the transmitted light of acquisition；
Determine that the best luminous power spectrum of axial symmetry is target light power spectrum from the luminous power spectrum obtained；
By the determining corresponding I of target light power spectrumphaseOr gain region temperature and the target light power spectrum in peak value The indicated I of pointDBRIn at least two parameters as adjust laser parameter.
2. the wavelength alignment methods of laser according to claim 1, which is characterized in that described from the luminous power obtained spectrum The best luminous power spectrum of middle determining axial symmetry is target light power spectrum, including：
Calculate the symmetry value of each luminous power spectrumWherein, IDBR1It is that the first mode hopping point is indicated IDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；Described first jumps Mould point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is along IDBRIncrease The direction mode hopping point nearest apart from the peak point that luminous power is composed；
In each luminous power spectrum, the target luminous power best as symmetry will be composed with the luminous power of minimum symmetry value Spectrum.
3. the wavelength alignment methods of laser according to claim 1 or 2, which is characterized in that it is described in adjustable range, Adjust the phase region injection current I of laserphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, including：
In adjustable range, I is adjusted by default step-lengthphaseOr the temperature of gain region, measure luminous power spectrum；
Whether the luminous power spectrum measured for each, the luminous power spectrum measured described in judgement meet the first Rule of judgment, second sentence Broken strip part and third Rule of judgment；If the luminous power spectrum measured meets the first Rule of judgment, the second Rule of judgment and third Rule of judgment then composes the luminous power spectrum measured as the luminous power of the acquisition；If the luminous power spectrum measured is not Meet first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；
Wherein, the luminous power for the emergent light that the peak point that first Rule of judgment is composed by luminous power indicates is more than the first threshold Value, the first threshold is determined according to light loss of the light power and emergent light of laser in optical transmission chain；Institute The luminous power absolute value of the difference for stating emergent light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than second Threshold value, the second threshold be according to the light power, emergent light of laser the light loss and MUX in optical transmission chain every Determining from degree；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.
4. the wavelength alignment methods of laser according to claim 2, which is characterized in that the mode hopping point was indicated goes out The luminous power for penetrating light is more than the luminous power of emergent light that at least one consecutive points adjacent with the mode hopping point are indicated, and with institute The difference for stating the luminous power that consecutive points are indicated is more than the 4th threshold value；4th threshold value is the light power according to the laser It is determined with the isolation of the MUX.
5. according to the wavelength alignment methods of claim 1-4 any one of them lasers, which is characterized in that it is described will be determining The corresponding I of target light power spectrumphaseOr gain region temperature and the target light power spectrum in peak point indicated IDBRIn at least two parameters as adjust laser parameter after, further include：
Send the parameter for adjusting laser.
6. the wavelength alignment methods of laser according to claim 5, which is characterized in that described to send the adjusting laser The parameter of device includes：
It sends physical layer operations management and safeguards PLOAM message；Reservation Reserve fields in the PLOAM message or institute The adjustment control Tuning Control fields stated in PLOAM message carry the parameter for adjusting laser.
7. a kind of wavelength alignment device of laser, which is characterized in that described device, including：
Obtain module, the phase region injection current I for adjusting laserphaseOr the temperature of gain region, obtain the laser The luminous power of device is composed, the electric current I of the dbr region of the luminous power spectrum indication laserDBRWith the emergent light of laser The correspondence of luminous power；The optical signal that the emergent light is emitted by the laser passes through first part's speculum and wave Division multiplexing device MUX reaches second part speculum, is reflected by the second part speculum and is reached by the MUX First part's speculum, the reflected light of acquisition；Alternatively, the optical signal that the emergent light is emitted by the laser, leads to Cross the MUX, the transmitted light of acquisition；
Determining module, for determining that the best luminous power spectrum of axial symmetry is target light power spectrum from the luminous power spectrum obtained；
Parameter module, the corresponding I of target light power spectrum for will determinephaseOr temperature and the target of gain region The I that peak point is indicated in luminous power spectrumDBRIn at least two parameters as adjust laser parameter.
8. the wavelength alignment device of laser according to claim 7, which is characterized in that the determining module, including：
Computing unit, the symmetry value for calculating each luminous power spectrumWherein, IDBR1It is the first mode hopping The indicated I of pointDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR； The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point It is along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；
Determination unit, for that in each luminous power spectrum, symmetry will be used as best with the luminous power of minimum symmetry value spectrum Target light power spectrum.
9. the wavelength alignment device of laser according to claim 7 or 8, which is characterized in that
The acquisition module is specifically used in adjustable range, and I is adjusted by default step-lengthphaseOr the temperature of gain region, it measures Luminous power is composed；Luminous power spectrum measured for each, the luminous power spectrum measured described in judgement whether meet the first Rule of judgment, Second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets the first Rule of judgment, the second Rule of judgment With third Rule of judgment, then the luminous power spectrum measured is composed as the luminous power of the acquisition；If the light work(measured Rate spectrum is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；
Wherein, the luminous power for the emergent light that the peak point that first Rule of judgment is composed by luminous power indicates is more than the first threshold Value, the first threshold is determined according to light loss of the light power and emergent light of laser in optical transmission chain；Institute The luminous power absolute value of the difference for stating emergent light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than second Threshold value, the second threshold be according to the light power, emergent light of laser the light loss and MUX in optical transmission chain every Determining from degree；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.
10. the wavelength alignment device of laser according to claim 8, which is characterized in that
The computing unit is specifically used for calculating the symmetry value of each luminous power spectrumWherein, IDBR1It is The I that first mode hopping point is indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is that the peak point that the luminous power is composed is marked The I shownDBR；The first mode hopping point is along IDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；Described 2 mode hopping points are along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；What the mode hopping point was indicated goes out The luminous power for penetrating light is more than the luminous power of emergent light that at least one consecutive points adjacent with the mode hopping point are indicated, and with institute The difference for stating the luminous power that consecutive points are indicated is more than the 4th threshold value；4th threshold value is the light power according to the laser It is determined with the isolation of the MUX.
11. according to the wavelength alignment device of claim 7-10 any one of them lasers, which is characterized in that described device, Further include：
Sending module, for sending the parameter for adjusting laser.
12. the wavelength alignment device of laser according to claim 11, which is characterized in that
The sending module, specifically for sending physical layer operations management and safeguarding PLOAM message；In the PLOAM message The adjustment control TuningControl fields retained in Reserve fields or the PLOAM message carry the adjusting laser The parameter of device.
13. a kind of optical network unit ONU, which is characterized in that including：Laser, first part's speculum, second part reflection Mirror, wavelength division multiplexer MUX and photodiode PD, the laser by first part's speculum, the MUX and The second part speculum connection, the PD are connect with first part's speculum；The ONU further includes：Processor, It is connect with the PD and the laser；
The laser in adjustable range, is emitted optical signal for the instruction according to the processor；
The PD is arrived for detecting the optical signal by the laser emitting by first part's speculum and the MUX Up to second part speculum, is reflected by the second part speculum and first part's speculum is reached by the MUX Reflected light, obtain the luminous power of the reflected light, the luminous power of the reflected light sent to the processor；
The processor is used to indicate the laser in adjustable range, adjusts the phase region injection current of the laser IphaseOr the temperature of gain region, obtain the luminous power spectrum of the laser, Prague of the luminous power spectrum indication laser The electric current I of echo areaDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；From the luminous power spectrum obtained Determine that the best luminous power spectrum of axial symmetry is target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr increase The I that peak point is indicated in the temperature in beneficial area and the target light power spectrumDBRIn at least two parameters as adjust laser The parameter of device.
14. ONU according to claim 13, which is characterized in that the processor is true from the luminous power spectrum obtained The best luminous power spectrum of dead axle symmetry is target light power spectrum, is specifically included：
The processor calculates the symmetry value of each luminous power spectrumWherein, IDBR1It is the first mode hopping point The I indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；Institute It is along I to state the first mode hopping pointDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is Along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；
The processor will compose the mesh best as symmetry in each luminous power spectrum with the luminous power of minimum symmetry value Mark luminous power spectrum.
15. the ONU according to claim 13 or 14, which is characterized in that the processor indicates that the laser is being adjusted In range, the phase region injection current I of the laser is adjustedphaseOr the temperature of gain region, obtain the light of the laser Power spectrum specifically includes：
The processor indicates the laser in adjustable range, and I is adjusted by default step-lengthphaseOr the temperature of gain region, And the instruction PD measures the luminous power of the reflected light, measures luminous power spectrum；
The processor is composed for each luminous power measured, and whether the luminous power spectrum measured described in judgement meets the first judgement Condition, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets the first Rule of judgment, the second judgement Condition and third Rule of judgment then compose the luminous power spectrum measured as the luminous power of the acquisition；It is measured if described Luminous power spectrum is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；
Wherein, the luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates is more than the first threshold Value, the first threshold is determined according to light loss of the light power and reflected light of laser in optical transmission chain；Institute The luminous power absolute value of the difference for stating reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than second Threshold value, the second threshold be according to the light power, reflected light of laser the light loss and MUX in optical transmission chain every Determining from degree；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.
16. ONU according to claim 14, which is characterized in that the luminous power for the reflected light that the mode hopping point is indicated is big It is indicated in the luminous power for the reflected light that at least one consecutive points adjacent with the mode hopping point are indicated, and with the consecutive points Luminous power difference be more than the 4th threshold value；4th threshold value be according to the light power of the laser and the MUX every Determining from degree.
17. according to claim 13-16 any one of them ONU, which is characterized in that the ONU further includes：Driving circuit；
The driving circuit is connect with the processor and the laser, for the instruction according to the processor, is being adjusted In range, the phase region injection current I of the laser is adjustedphaseOr the temperature of gain region；
The laser is emitted optical signal under the driving of the driving circuit.
18. a kind of optical line terminal OLT, which is characterized in that including：Laser, first part's speculum, second part reflection Mirror, wavelength division multiplexer MUX and photodiode PD, the laser by first part's speculum, the MUX and The second part speculum connection, the PD are connect with first part's speculum；The OLT further includes：Processor, It is connect with the PD and the laser；
The laser in adjustable range, is emitted optical signal for the instruction according to the processor；
The PD is arrived for detecting the optical signal by the laser emitting by first part's speculum and the MUX Up to second part speculum, is reflected by the second part speculum and first part's speculum is reached by the MUX Reflected light, obtain the luminous power of the reflected light, the luminous power of the reflected light sent to the processor；
The processor is used to indicate the laser in adjustable range, adjusts the phase region injection current of the laser IphaseOr the temperature of gain region, obtain the luminous power spectrum of the laser, Prague of the luminous power spectrum indication laser The electric current I of echo areaDBRWith the correspondence of the luminous power of the detected reflected lights of the PD；From the luminous power spectrum obtained Determine that the best luminous power spectrum of axial symmetry is target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr increase The I that peak point is indicated in the temperature in beneficial area and the target light power spectrumDBRIn at least two parameters as adjust laser The parameter of device.
19. OLT according to claim 18, which is characterized in that the processor is true from the luminous power spectrum obtained The best luminous power spectrum of dead axle symmetry is target light power spectrum, is specifically included：
The processor calculates the symmetry value of each luminous power spectrumWherein, IDBR1It is the first mode hopping point The I indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；Institute It is along I to state the first mode hopping pointDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is Along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；
The processor will compose the mesh best as symmetry in each luminous power spectrum with the luminous power of minimum symmetry value Mark luminous power spectrum.
20. the OLT according to claim 18 or 19, which is characterized in that the processor indicates that the laser is being adjusted In range, the phase region injection current I of the laser is adjustedphaseOr the temperature of gain region, obtain the light of the laser Power spectrum specifically includes：
The processor indicates the laser in adjustable range, and I is adjusted by default step-lengthphaseOr the temperature of gain region, And the instruction PD measures the luminous power of the reflected light, measures luminous power spectrum；
The processor is composed for each luminous power measured, and whether the luminous power spectrum measured described in judgement meets the first judgement Condition, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets the first Rule of judgment, the second judgement Condition and third Rule of judgment then compose the luminous power spectrum measured as the luminous power of the acquisition；It is measured if described Luminous power spectrum is unsatisfactory for first Rule of judgment, and the luminous power spectrum of the existing acquisition, then stops measuring；
Wherein, the luminous power for the reflected light that the peak point that first Rule of judgment is composed by luminous power indicates is more than the first threshold Value, the first threshold is determined according to light loss of the light power and reflected light of laser in optical transmission chain；Institute The luminous power absolute value of the difference for stating reflected light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than second Threshold value, the second threshold be according to the light power, reflected light of laser the light loss and MUX in optical transmission chain every Determining from degree；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.
21. OLT according to claim 19, which is characterized in that the luminous power for the reflected light that the mode hopping point is indicated is big It is indicated in the luminous power for the reflected light that at least one consecutive points adjacent with the mode hopping point are indicated, and with the consecutive points Luminous power difference be more than the 4th threshold value；4th threshold value be according to the light power of the laser and the MUX every Determining from degree.
22. according to claim 18-21 any one of them OLT, which is characterized in that the OLT further includes：Driving circuit；
The driving circuit is connect with the processor and the laser, for the instruction according to the processor, is being adjusted In range, the phase region injection current I of the laser is adjustedphaseOr the temperature of gain region；
The laser is emitted optical signal under the driving of the driving circuit.
23. a kind of optical line terminal OLT, which is characterized in that including：Wavelength division multiplexer MUX, receiver, transmitter and place Manage device；The processor is connect with the receiver and the transmitter respectively；
The receiver, the transmitted light for detecting the optical signal being emitted by laser by the MUX, obtains the transmission The luminous power of light；
The processor, in adjustable range, indicating that the laser adjusts phase region injection current IphaseOr gain The temperature in area obtains the luminous power spectrum of the laser, the electric current of the dbr region of the luminous power spectrum indication laser IDBRThe correspondence of the luminous power of the transmitted light obtained with the receiver；Axial symmetry is determined from the luminous power spectrum obtained Best luminous power spectrum is target light power spectrum；By the determining corresponding I of target light power spectrumphaseOr the temperature of gain region, And the I that peak point is indicated in the target light power spectrumDBRAt least two parameters are as the parameter for adjusting laser；
The transmitter, for sending the parameter for adjusting laser.
24. OLT according to claim 23, which is characterized in that the processor determines axis from the luminous power spectrum obtained The best luminous power spectrum of symmetry is target light power spectrum, is specifically included：
The processor calculates the symmetry value of each luminous power spectrumWherein, IDBR1It is the first mode hopping point The I indicatedDBR, IDBR2It is the I that the second mode hopping point is indicatedDBR, ImIt is the I that the peak point of the luminous power spectrum is indicatedDBR；Institute It is along I to state the first mode hopping pointDBRReduce the nearest mode hopping point of the peak point composed apart from luminous power of direction；The second mode hopping point is Along IDBRThe augment direction mode hopping point nearest apart from the peak point that luminous power is composed；
The processor will compose the mesh best as symmetry in each luminous power spectrum with the luminous power of minimum symmetry value Mark luminous power spectrum.
25. the OLT according to claim 23 or 24, which is characterized in that the processor indicates laser in adjustable range Device adjusts phase region injection current IphaseOr the temperature of gain region, the luminous power spectrum of the laser is obtained, is specifically included：
The processor indicates that the laser adjusts I by default step-length in adjustable rangephaseOr the temperature of gain region, Measure luminous power spectrum；
The processor is composed for each luminous power measured, and whether the luminous power spectrum measured described in judgement meets the first judgement Condition, the second Rule of judgment and third Rule of judgment；If the luminous power spectrum measured meets first Rule of judgment, described second Rule of judgment and the third Rule of judgment then preserve the luminous power spectrum measured；If the luminous power spectrum measured is unsatisfactory for institute The first Rule of judgment, and the luminous power spectrum of the existing acquisition are stated, then stops measuring；
Wherein, the luminous power for the transmitted light that the peak point that first Rule of judgment is composed by luminous power indicates is more than the first threshold Value, the first threshold is determined according to light loss of the light power and transmitted light of laser in optical transmission chain；Institute The luminous power absolute value of the difference for stating transmitted light of second Rule of judgment between the first mode hopping point and the second mode hopping point is less than second Threshold value, the second threshold be according to the light power, transmitted light of laser the light loss and MUX in optical transmission chain every Determining from degree；The third Rule of judgment is the symmetry value of luminous power spectrumLess than third threshold value, In, IDBR1The I indicated by the first mode hopping pointDBR, IDBR2The I indicated by the second mode hopping pointDBR, ImIt is indicated by peak point IDBR, the third threshold value is light power according to laser, IDBRValue range, MUX bandwidth chahnel and MUX isolation Degree determination.
26. OLT according to claim 24, which is characterized in that the luminous power for the reflected light that the mode hopping point is indicated is big It is indicated in the luminous power for the transmitted light that at least one consecutive points adjacent with the mode hopping point are indicated, and with the consecutive points Luminous power difference be more than the 4th threshold value；4th threshold value be according to the light power of the laser and the MUX every Determining from degree.
27. according to claim 23-26 any one of them OLT, which is characterized in that the transmitter sends the adjusting laser The parameter of device, specifically includes：
The transmitter sends physical layer operations management and safeguards PLOAM message；Reservation Reserve in the PLOAM message Adjustment control Tuning Control fields in field or the PLOAM message carry the parameter for adjusting laser.
28. a kind of passive optical network PON system, which is characterized in that including such as claim 23-27 any one of them optical link Terminal OLT and optical network unit ONU；The OLT is connect with the ONU；
The ONU adjusts the phase region injection current I of laser for the instruction according to the OLTphaseOr gain region Temperature；And the parameter for the adjusting laser that the OLT is sent is received, according to the parameter for adjusting laser into traveling wave Long alignment.
CN201480012297.1A 2014-06-30 2014-06-30 The wavelength alignment methods and device of laser, ONU, OLT and PON system Active CN105409073B (en)

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