CN102937734A - Optical network unit three-direction optical assembly with optical time domain signal reflection function - Google Patents
Optical network unit three-direction optical assembly with optical time domain signal reflection function Download PDFInfo
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- CN102937734A CN102937734A CN2012104148634A CN201210414863A CN102937734A CN 102937734 A CN102937734 A CN 102937734A CN 2012104148634 A CN2012104148634 A CN 2012104148634A CN 201210414863 A CN201210414863 A CN 201210414863A CN 102937734 A CN102937734 A CN 102937734A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4286—Optical modules with optical power monitoring
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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Abstract
The invention discloses an optical network unit three-direction optical assembly with an optical time domain signal reflection function. The transmission process that upstream light emitted by a laser device enters an optical interface from a first optical filter and a second optical filter to enter an optical fiber is finished by the first optical filter, the second optical filter, a third optical filter and a fourth optical filter; and the transmission of downstream light containing a digital optical signal or a simulated optical signal, which is received by the optical interface, to a first photoelectric detector or a second photoelectric detector through corresponding optical filters in the first optical filter, the second optical filter, the third optical filter and the fourth optical filter is realized by the first optical filter, the second optical filter, the third optical filter and the fourth optical filter. An optical time domain detection signal received by the optical interface is reflected or transmitted by the second optical filter, is collected and reflected to the second optical filter or the first optical filter by the third optical filter or the fourth optical filter with a concave curve surface, and is transmitted to the optical interface through the second optical filter. The optical filter with the concave curve structure, which can collect and reflect the optical time domain detection signal, is adopted, so as to enhance the energy that optical time domain detection signal return to an optical network; and the problems that film plating is complicated caused by a plane optical filter, the cost is increased, upstream and downstream optical signals are certainly influenced and the reflection of the optical time domain detection signal is weak are solved.
Description
Technical field
The present invention relates to technical field of optical fiber communication, particularly relate to a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex function.
Background technology
In recent years, based on FTTx(FTTH, the FTTB of optical fiber communication, FTTC etc.) broadband network relies on it can be for the user provide voice, data and Video service at a high speed, and be able to fast development.But operator is to user's supervision and the detection and localization of optical network link case point, contradiction.At present, in the process that the optical network unit (ONU) as user side is detected, mainly be to identify by user's data traffic as the optical line terminal (OLT) of local side, can not locate accurately and monitor the user.And light time territory signal reflex meter (OTDR) adopts the method for time domain measurement, emission has the light pulse of certain wavelength and injects tested optical fiber, then by the Rayleigh scattering returned in the detection fiber and the Fresnel reflection optical signal power distribution curve along time shaft, can find out the physical characteristicss such as the length of tested optical fiber and loss.Simultaneously, utilize the powerful data analysis function of light time territory signal reflex meter, can also realize accurately location to the case point in the optical fiber link and trouble spot; Also can form database in the future operator's on-line monitoring test, be convenient in the maintenance fibre circuit is carried out true of quality and troubleshooting etc.Therefore, utilizing light time territory signal reflex meter that detection and location are carried out in the trouble spot in the fibre circuit and user side, is the developing direction of optical-fiber network.
Single fiber three-way ONU optical assembly also has the function of receiver, video simulating signal when having common ONU function.It is to realize one of needed Primary Component in phone, CATV (cable television) and this target of online " unification of three nets ".
In order to realize the OTDR function, traditional approach is to utilize merely traditional optically flat filter to realize the reflection and transmission of multi-wavelength signals.Its shortcoming is: traditional optically flat filter does not converge the ability of light signal.If the optical filter of reflected light time-domain signal is arranged on the position near optical interface, need to take into account reflection and the perspective of multi-wavelength, cause the plated film complicacy sharply to increase.If the optical filter of reflected light time-domain signal is arranged on the position away from optical interface, the light time territory signal energy that is reflected back is with deficiency.
Summary of the invention
The purpose of this invention is to provide a kind of single fiber optical network unit three-dimensional optical assembly, have the OTDR function, do not increase simultaneously the volume of optical assembly, so that the three-dimensional optical assembly can be good at incorporating among the existing optical-fiber network.
According to an aspect of the present invention, a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex function is provided, comprise: be used for launching up light laser instrument, receive descending light digital optical signal the first photodetector and receive the second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The first optical filter one facing to described laser instrument, another side, reflects the digital optical signal the descending light that receives from optical interface the complete transmission of utilizing emitted light signal that laser instrument sends fully towards the first photodetector and optical interface;
The second optical filter one facing to described laser instrument and the first photodetector, another side is towards the second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The 3rd optical filter one facing to the second photodetector, another side is towards the second optical filter;
The 4th optical filter one facing to the first photodetector, another side will be transmitted through the first photodetector from the digital optical signal that the reflection of the first optical filter comes fully towards the first optical filter and the second optical filter;
The light time territory detection signal that the second optical filter reflected light interface receives;
The 3rd optical filter is concave curved surface towards the face of the second optical filter, the analog optical signal that comes from the reflection of the second optical filter is transmitted through the second photodetector fully, and will after the light time territory detection signal that the reflection of the second optical filter comes is assembled and reflex on the second optical filter, enters described optical interface.
Wherein, the 3rd optical filter reflexes to the second optical filter fully with territory detection signal of described light time, and the second optical filter should reflex to described optical interface by light time territory detection signal, and the intensity that reflexes to the laggard light time territory detection signal that enters optical fiber of described optical interface from the second optical filter is at least 10% of the intensity of the light time territory detection signal that enters optical network unit three-dimensional optical assembly from described optical interface.
According to another aspect of the present invention, a kind of optical network unit three-dimensional optical assembly with light time territory signal reflex function is provided, comprise: be used for launching up light laser instrument, receive the first photodetector of descending light digital optical signal and receive the second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The first optical filter one facing to described laser instrument, another side is towards the first photodetector and optical interface, the complete transmission of utilizing emitted light signal that laser instrument is sent;
The second optical filter one facing to described laser instrument and the first photodetector, another side is towards the second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The 3rd optical filter one facing to the second photodetector, another side will be transmitted through the second photodetector from the analog optical signal that the reflection of the second optical filter comes fully towards the second optical filter;
The 4th optical filter one facing to the first photodetector, another side is towards the first optical filter and the second optical filter;
The light time territory detection signal that the second optical filter transmitted light interface receives and from digital optical signal to the first optical filter in the descending light of optical interface, the first optical filter reflects territory detection signal of described light time and reflects described digital optical signal fully;
The 4th optical filter is concave curved surface towards the face of the first and second optical filters, to be transmitted through the first photodetector fully from the digital optical signal that the first optical filter reflection comes, and will assemble and reflex to from the light time territory detection signal that the reflection of the first optical filter comes and enter described optical interface after the first optical filter and transmission are crossed on the second optical filter.
Wherein, the 4th optical filter reflexes to the first optical filter fully with territory detection signal of described light time, and transmission was crossed the second optical filter and is entered described optical interface after the first optical filter will reflex to the second optical filter from the light time territory detection signal that the 4th optical filter reflects, from the first optical filter reflection and transmission through the intensity that enters the light time territory detection signal of optical fiber through optical interface the second optical filter after be from described optical interface enter optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
Wherein, the wavelength of described light time territory detection signal is 1600nm-1665nm.
Wherein, the angle of the first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and the second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of laser instrument extension.
Wherein, the optical axis of the optical axis of described laser instrument and described optical interface is located along the same line substantially; The optical axis of the first photodetector is substantially vertical with the optical axis of described laser instrument; The optical axis of described the second photodetector is substantially vertical with the optical axis of described laser instrument.
Described optical network unit optical assembly also comprises: betal can; The first optical filter, the second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, the first and second photodetectors and described optical interface are installed on the described betal can.
In the optical network unit three-dimensional optical assembly with light time territory signal reflex function of the present invention, because the optical filter on plane is replaced with the optical filter with curved-surface structure, so that this optical filter has the convergence reflex function to light time territory detection signal, strengthened the energy of light time territory detection signal back light network, avoided utilizing merely the optical filter technology on plane to realize the plated film complexity that the reflection and transmission of multi-wavelength signals exists, cost increases, original up and downlink optical signal is subjected to certain influence, the weak problem of light time territory detection signal reflection, improve yield rate and the reliability of the optical network unit three-dimensional optical assembly with light time territory signal reflex function, and do not increased the volume of former three-dimensional optical assembly.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is according to the structural representation with optical network unit three-dimensional optical assembly of light time territory signal reflex function of the present invention.
Fig. 2 is the light path principle figure with optical network unit three-dimensional optical assembly of light time territory signal reflex function according to an embodiment of the invention.
Fig. 3 is the light path principle figure of the optical network unit three-dimensional optical assembly with light time territory signal reflex function according to another embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Passive optical network PON (Passive Optical Network) technology is a kind of typical point-to-multipoint access technology, is comprised of the optical line terminal OLT of local side, optical network unit ONU and the Optical Distribution Network ODN of user side.In a PON system, generally only comprise an optical line terminal OLT that is installed in the console for centralized control.After the descending light of optical line terminal OLT emission is divided into multipath light signal by ODN, transfer to respectively in the optical network unit ONU at different levels by optical fiber.Optical network unit ONU is installed on customer site.A customer site need to be installed an ONU, receives the descending light that OLT sends, and returns up light to OLT.
OLT and ONU need to realize mutual conversion between electric signal and the light signal with photoelectric device.Among the present invention, integrated wavelength-division multiplex element for reflected light time domain detection signal in existing ONU photoelectric device is realized the single fiber bi-directional transmission of uplink optical signal, downlink optical signal and light time territory detection signal.Therefore, under the prerequisite of guaranteeing the light signal proper communication, have the OTDR function, thereby realized the function of system's local side OLT to real-time online detection, monitoring and the localization of fault of whole optical network unit ONU.Utilize photoelectric device of the present invention, solved the problem that the prior art consistance is poor, accuracy is low, can also solve the miniaturization issues of optical module, the closeness of increase equipment.
Among the present invention, the optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises laser instrument, first to fourth optical filter, the first and second photodetectors and optical interface.Wherein, the first to fourth optical filter up light of finishing laser instrument emission through the first and second optical filters to optical interface enter the transmission of optical fiber and the respective filter of descending light through first to fourth optical filter that comprises digital optical signal or analog optical signal that receive from optical interface to the transmission of the first or second photodetector.The light time territory detection signal that the reflection of the second optical filter or transmitted light interface receive.The one side of the 3rd or the 4th optical filter is concave curved surface, has the 3rd optical filter or the convergence of the 4th optical filter of concave curved surface and reflexes to the second or first optical filter, and be transferred in the optical interface through the second optical filter.
Fig. 1 is according to the structural representation with optical network unit three-dimensional optical assembly of light time territory signal reflex function of the present invention.Fig. 2 is the light path principle figure of the optical network unit three-dimensional optical assembly with light time territory signal reflex function of one embodiment of the present of invention.As illustrated in fig. 1 and 2, optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises: the laser instrument 1 that is used for launching up light, photodetector 2 for the digital optical signal that receives descending light, photodetector 3 for the analog optical signal that receives descending light, the optical interface 4 that is used for external optical fiber, and the first optical filter 5, the second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8.The first optical filter 5 one is facing to laser instrument 1, and another side is towards the photodetector 2 and the optical interface 4 that receive digital optical signal; The second optical filter 6 one is facing to the photodetector 2 of laser instrument 1 and reception digital optical signal, and another side is towards the photodetector 3 and the optical interface 4 that receive analog optical signal; The 3rd optical filter 7 one is facing to the photodetector 3 that receives analog optical signal, and another side is towards the second optical filter 6; The 4th optical filter one is facing to the photodetector 2 that receives digital optical signal, and another side is towards the first optical filter 5 and the second optical filter 6.5 pairs of complete transmissions of utilizing emitted light signal of the first optical filter are reflected fully to the digital optical signal that receives; 6 pairs of complete transmissions of utilizing emitted light signal of the second optical filter to the complete transmission of digital optical signal that receives, are reflected fully to the analog optical signal that receives; The complete transmission of analog optical signal of 7 pairs of receptions of the 3rd optical filter, and other light signals are reflected fully; The complete transmission of digital optical signal of 8 pairs of receptions of the 4th optical filter is reflected fully to the analog optical signal that receives, and also other light signals is reflected fully.
Among the embodiment shown in Figure 2, the second optical filter 6 and the 3rd optical filter 7 are the optical filters for reflected light time domain detection signal.The 3rd optical filter 7 is concave curved surface towards the surface of the second optical filter 6, to being transmitted through photodetector 3 fully from optical interface and through the analog optical signal of the second optical filter reflection, and to assembling and fully reflection from optical interface and through the light time territory detection signal of the second optical filter reflection.Particularly, optical network unit three-dimensional optical assembly with light time territory signal reflex function is incorporated into optical network unit three-dimensional optical assembly inside by optical interface 4 with light time territory detection signal, light time territory detection signal reflexes on the concave curved surface of the 3rd optical filter 7 through the second optical filter 6, after 7 reflection of the 3rd optical filter and converging, again reflex on the second optical filter 6, reflexed to optical interface 4 by the second optical filter 6 more at last, and by in the described optical interface 4 returning to external optical-fiber networks, in the optical line terminal under transferring to, realize the detection and localization to the optical network unit at this optical network unit three-dimensional optical assembly place.From the 3rd optical filter 7 convergence reflexs to the second optical filter 6 and by the second optical filter reflect into into optical interface then enter optical fiber light time territory detection signal intensity for from optical interface incide optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
Up light by laser instrument 1 emission enters optical-fiber network successively through the first optical filter 5 and the second optical filter 6 by optical interface 4.After digital optical signal in the descending light enters optical assembly from optical interface 4, by the second optical filter 6, and by the first optical filter 5 reflections the 4th optical filter 8, and transmission receives the photodetector 2 of digital optical signal by the 4th optical filter 8 directives.Analog optical signal in the descending light is reflexed to the 4th optical filter 8 by the second optical filter 6 after entering optical assembly from optical interface 4, and transmission receives the photodetector 3 of analog optical signal by the 3rd optical filter 7 directives.
In the present embodiment, the optical axis of the optical axis of laser instrument 1 and optical interface 4 is located along the same line substantially.Referring to Fig. 2, also be the directions X of the optical axis of laser instrument 1 direction of extending toward optical interface in the Cartesian coordinates in other words of direction from left to right of the optical axis of optical interface 4 take the optical axis of laser instrument 1, from bottom to top the direction vertical with the optical axis of laser instrument 1 is the Y-direction in the Cartesian coordinates.The angle of the first optical filter 5 between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument 1 extends toward optical interface 4 is about 135 degree, and the second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface 4 and laser instrument 1 toward the angle between the direction of optical interface 4 extensions.For ease of the topology layout of each device, in the present embodiment, the optical axis of laser instrument 1 is substantially vertical with the optical axis of the photodetector 2 that receives digital optical signal; Simultaneously, the optical axis of laser instrument 1 is substantially vertical with the optical axis of the photodetector 3 that receives analog optical signal.The 3rd optical filter 7 towards the side of the second optical filter 6 for having curved-surface structure.In the present embodiment, the 3rd optical filter is concave curved surface towards the face of the second optical filter 6, and its axis is substantially parallel with the optical axis of the photodetector 3 that receives analog optical signal; The normal of the 4th optical filter 8 is substantially parallel with the optical axis of the photodetector 2 that receives digital optical signal.
Fig. 3 is the light path principle of the three-dimensional optical assembly embodiment with light time territory signal reflex function of an alternative embodiment of the invention.In the present embodiment, the same with embodiment shown in Figure 2, optical network unit three-dimensional optical assembly with light time territory signal reflex function comprises: the laser instrument 1 that is used for launching up light, photodetector 2 for the digital optical signal that receives descending light, photodetector 3 for the analog optical signal that receives descending light, the optical interface 4 that is used for external optical fiber, and the first optical filter 5, the second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8.The position relationship of each device of each device of the optical network unit three-dimensional optical assembly of present embodiment and optical network unit shown in Figure 2 and act on basic identical.Different from the optical network unit among Fig. 2 is, in the embodiments of figure 3, the 3rd optical filter 7 is not concave curved surface towards the side of the second optical filter 6, and the 4th optical filter 8 is concave curved surface towards the side of the first and second optical filters.That is, the 3rd optical filter does not have the convergence reflex function to light time territory detection signal, but the 4th optical filter 8 pairs of light time territory detection signal has the convergence reflex function.Particularly, the second optical filter 6 will be transmitted through the first optical filter 5 from the digital optical signal in the descending light of optical interface 4 and light time territory detection signal, and will reflex to from the analog optical signal in the descending light of optical interface 4 the 3rd optical filter 7.The first optical filter 5 reflexes to the 8 rear transmissions of the 4th optical filter with digital optical signal and crosses the 4th optical filter 8 and enter photodetector 2.The light time territory detection signal that the 4th optical filter 8 receives from the first optical filter, and light time territory detection signal carried out convergence reflex to the first optical filter 5, light time territory detection signal is reflexed to the second optical filter 6 and transmission by the first optical filter 5 and crosses the second optical filter and enter optical interface 4 afterwards.In the present embodiment, be at least 10% of the intensity of the light time territory detection signal that enters optical network unit three-dimensional optical assembly from described optical interface from intensity the first optical filter reflection and transmission enters the light time territory detection signal of optical fiber by optical interface through the second optical filter.
In the above embodiment of the present invention, the 3rd or the 4th optical filter adopts curved surface face structure, in reflected light time domain detection signal light time territory detection signal is converged.The above embodiment of the present invention is not to be that restriction has the concrete shape of curved-surface structure that light time territory detection signal is carried out the optical filter of convergence reflex function.
Further, the wavelength of the uplink optical signal of 1 emission of the laser instrument in above-described embodiment is 1260nm-1360nm; The wavelength of the downlink optical signal that the photodetector 2 of reception digital optical signal receives is 1480nm-1500nm; The wavelength of the downlink optical signal that the photodetector 3 of reception analog optical signal receives is 1550nm-1560nm; The wavelength of light time territory detection signal is 1600nm-1665nm.Preferably, select every section representative value in the lightwave signal section, be respectively 1310nm, the 1490nm in the descending digital optical signal, the 1550nm in the descending analog optical signal in the uplink optical signal.It number can be 1610nm, 1625nm or 1650nm that the light time territory is detected.
Further, the optical network unit optical assembly with light time territory signal reflex function of embodiments of the invention can also comprise betal can 9.The first optical filter 5, the second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8 are arranged in the betal can 9, and photodetector 3 and the optical interface 4 of the photodetector 2 of laser instrument 1, receiving digital signals, reception simulating signal are fixed on the betal can 9.Preferably, the photodetector 3 of the photodetector 2 of receiving digital signals and reception simulating signal is fixed on the betal can 9 by insulating mat 10.
In the process of assembling optical network unit optical assembly, can first the first optical filter 5, the second optical filter 6, the 3rd optical filter 7 and the 4th optical filter 8 be arranged in the betal can 9.Then, it is right-hand by active coupling scheme optical interface 4 to be fixed on betal can 9.Concrete, when coupling, input light time territory detection signal light by optical interface, and by the light time territory detection signal strength that the optical interface detection of reflected is returned, after the reflection strength of light time territory detection signal reaches the requirement standard, optical interface is fixed on the betal can.Afterwards, by active coupling laser instrument 1 is fixed on the left of betal can 9, can be so that the light that laser instrument 1 sends more enter optical interface 4 during active coupling, thus guarantee the energy of uplink optical signal.Particularly, make laser instrument 1 luminous when coupling, draw and receiving optical signals from optical interface 4, fine adjustment laser instrument 1 is with respect to the position of betal can 9, so that the light signal of drawing from optical interface 4 is the strongest, fix laser instrument 1 and betal can this moment.The photodetector 2 that next, will receive digital optical signal by active coupling scheme is fixed on the below of betal can 9.Particularly, introduce digital optical signal from optical interface 4 when coupling, and receive with photodetector 2, fine adjustment photodetector 2 is with respect to the position of betal can 9, so that the signal that photodetector 2 receives is the strongest, be fixed on photodetector on the betal can this moment.Equally, according to similar mode, the photodetector 3 that will receive analog optical signal by active coupling scheme is fixed on the top of betal can 9.Active coupling can be so that digital optical signal and the simulated light sent from optical interface more enter photodetector 2 and 3, thereby guarantee that downlink optical signal can better be received.
In the optical network unit three-dimensional optical assembly with light time territory signal reflex function of the present invention, because the optical filter on plane is replaced with the optical filter with curved-surface structure, so that this optical filter has the convergence reflex function to light time territory detection signal, strengthened the energy of light time territory detection signal back light network, avoided utilizing merely the optical filter technology on plane to realize the plated film complexity that the reflection and transmission of multi-wavelength signals exists, cost increases, original up and downlink optical signal is subjected to certain influence, the weak problem of light time territory detection signal reflection, improve yield rate and the reliability of the optical network unit three-dimensional optical assembly with light time territory signal reflex function, and do not increased the volume of former three-dimensional optical assembly.Of the present invention have the optical network unit three-dimensional optical assembly of light time territory signal reflex function in the optical network unit single fiber three-way photoelectric device various functions of realizing user side, can effectively realize the reflection function of light time territory signal reflex meter with light time domain detection signal, compare the optical network unit single fiber three-way photoelectric device of existing user side, have accurate, simple to operate, the cheap characteristics of light time territory detection signal reflection, can make local side the optical network unit user of user side be realized the fault detection capability of in real time accurately on-line monitoring and optical link.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. optical network unit three-dimensional optical assembly with light time territory signal reflex function, comprise: be used for launching up light laser instrument, receive descending light digital optical signal the first photodetector and receive the second photodetector, first to fourth optical filter of the analog digital light signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The first optical filter one facing to described laser instrument, another side, reflects the digital optical signal the descending light that receives from optical interface the complete transmission of utilizing emitted light signal that laser instrument sends fully towards the first photodetector and optical interface;
The second optical filter one facing to described laser instrument and the first photodetector, another side is towards the second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The 3rd optical filter one facing to the second photodetector, another side is towards the second optical filter;
The 4th optical filter one facing to the first photodetector, another side will be transmitted through the first photodetector from the digital optical signal that the reflection of the first optical filter comes fully towards the first optical filter and the second optical filter;
It is characterized in that,
The light time territory detection signal that the second optical filter reflected light interface receives;
The 3rd optical filter is concave curved surface towards the face of the second optical filter, the analog optical signal that comes from the reflection of the second optical filter is transmitted through the second photodetector fully, and will after the light time territory detection signal that the reflection of the second optical filter comes is assembled and reflex on the second optical filter, enters described optical interface.
2. optical network unit three-dimensional optical assembly according to claim 1, wherein, the 3rd optical filter reflexes to the second optical filter fully with territory detection signal of described light time, and the second optical filter should reflex to described optical interface by light time territory detection signal, reflex to described optical interface from the second optical filter and go forward side by side and be at least 10% of the intensity of the light time territory detection signal that enters described optical network unit three-dimensional optical assembly from described optical interface into the intensity of the light time territory detection signal of optical fiber.
3. optical network unit three-dimensional optical assembly according to claim 1, wherein, the wavelength of territory detection signal of described light time is 1600nm-1665nm.
4. optical network unit three-dimensional optical assembly according to claim 1, wherein, the angle of the first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and the second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of optical interface extension;
The optical axis of described laser instrument and the optical axis of described optical interface are located along the same line substantially; The optical axis of the first photodetector is substantially vertical with the optical axis of described laser instrument; The optical axis of described the second photodetector is substantially vertical with the optical axis of described laser instrument.
5. optical network unit optical assembly according to claim 1 also comprises:
Betal can;
The first optical filter, the second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, the first and second photodetectors and described optical interface are installed on the described betal can.
6. optical network unit three-dimensional optical assembly with light time territory signal reflex function, comprise: be used for launching up light laser instrument, receive descending light digital optical signal the first photodetector and receive the second photodetector, first to fourth optical filter of the analog optical signal in the descending light and be used for external optical fiber to transmit the optical interface of up light and descending light and light time territory detection signal, wherein
The first optical filter one facing to described laser instrument, another side is towards the first photodetector and optical interface, the complete transmission of utilizing emitted light signal that laser instrument is sent;
The second optical filter one facing to described laser instrument and the first photodetector, another side is towards the second photodetector and optical interface, to the described complete transmission that transmits, to the complete transmission of digital optical signal in the described descending light, the analog optical signal in the described descending light is reflected fully;
The 3rd optical filter one facing to the second photodetector, another side will be transmitted through the second photodetector from the analog optical signal that the reflection of the second optical filter comes fully towards the second optical filter;
The 4th optical filter one facing to the first photodetector, another side is towards the first optical filter and the second optical filter;
It is characterized in that,
The light time territory detection signal that the second optical filter transmitted light interface receives and from digital optical signal to the first optical filter in the descending light of optical interface, the first optical filter reflects territory detection signal of described light time and reflects described digital optical signal fully;
The 4th optical filter is concave curved surface towards the face of the first and second optical filters, to be transmitted through the first photodetector fully from the digital optical signal that the first optical filter reflection comes, and will assemble and reflex to from the light time territory detection signal that the reflection of the first optical filter comes and enter described optical interface after the first optical filter and transmission are crossed on the second optical filter.
7. optical network unit three-dimensional optical assembly according to claim 6, wherein, the 4th optical filter reflexes to the first optical filter fully with territory detection signal of described light time, and transmission was crossed the second optical filter and is entered described optical interface after the first optical filter will reflex to the second optical filter from the light time territory detection signal that the 4th optical filter reflects, from the first optical filter reflection and transmission through the intensity that enters the light time territory detection signal of optical fiber through optical interface the second optical filter after be from described optical interface enter described optical network unit three-dimensional optical assembly light time territory detection signal intensity at least 10%.
8. optical network unit three-dimensional optical assembly according to claim 6, wherein, the wavelength of territory detection signal of described light time is 1600nm-1665nm.
9. optical network unit three-dimensional optical assembly according to claim 6, wherein, the angle of the first optical filter between the direction that the optical axis of the outside normal direction by this surface on the surface of laser instrument and laser instrument extends toward optical interface is about 135 degree, and the second optical filter 6 is about 45 to spend towards the optical axis of the outside normal direction by this surface on the surface of optical interface and laser instrument toward the angle between the direction of optical interface extension;
The optical axis of described laser instrument and the optical axis of described optical interface are located along the same line substantially; The optical axis of the first photodetector is substantially vertical with the optical axis of described laser instrument; The optical axis of described the second photodetector is substantially vertical with the optical axis of described laser instrument.
10. optical network unit optical assembly according to claim 6 also comprises:
Betal can;
The first optical filter, the second optical filter, the 3rd optical filter and the 4th optical filter are arranged in the described betal can, and described laser instrument, the first and second photodetectors and described optical interface are installed on the described betal can.
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| CN201510789893.7A CN105278058B (en) | 2012-10-25 | 2012-10-25 | ONU (optical network unit) triplexer optical assembly with optical time domain signal reflection function |
| CN201210414863.4A CN102937734B (en) | 2012-10-25 | 2012-10-25 | There is the optical network unit three-dimensional optical assembly of optical time domain signal reflex function |
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| CN201210414863.4A CN102937734B (en) | 2012-10-25 | 2012-10-25 | There is the optical network unit three-dimensional optical assembly of optical time domain signal reflex function |
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| CN201510789893.7A Division CN105278058B (en) | 2012-10-25 | 2012-10-25 | ONU (optical network unit) triplexer optical assembly with optical time domain signal reflection function |
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Also Published As
| Publication number | Publication date |
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| CN105278058A (en) | 2016-01-27 |
| CN102937734B (en) | 2015-11-18 |
| CN105278058B (en) | 2017-04-12 |
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