CN107360481A - Optical assembly and optical line terminal - Google Patents
Optical assembly and optical line terminal Download PDFInfo
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- CN107360481A CN107360481A CN201710677577.XA CN201710677577A CN107360481A CN 107360481 A CN107360481 A CN 107360481A CN 201710677577 A CN201710677577 A CN 201710677577A CN 107360481 A CN107360481 A CN 107360481A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 266
- 239000013307 optical fiber Substances 0.000 claims abstract description 18
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims description 19
- 238000005538 encapsulation Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 210000004209 hair Anatomy 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006855 networking Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 210000003644 lens cell Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010181 polygamy Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0003—Details
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- Optical Couplings Of Light Guides (AREA)
Abstract
This application provides a kind of optical assembly and optical line terminal, the optical assembly includes：Transmitter unit, WDM device, the first receiver, the second receiver, lens element and optical fiber interface；Transmitter unit is used to launch the light comprising first wave length and second wave length；Lens element is used to the light comprising first wave length and second wave length being coupled to optical fiber interface, and the upward signal of the 3rd wavelength and the 4th wavelength is subject into optical beam transformation；Can compatible GPON and NG PON simultaneously, while two kinds of ONU corresponding to taking into account in network, be advantageous to GPON systems to the smooth upgrade of NG PON systems.
Description
Technical field
The application is related to fiber optic communication field, more particularly to a kind of optical assembly and optical line terminal.
Background technology
The lifting of access network transmission rate is needed gigabit passive optical network (Gigabit-Capable Passive
Optical Network, GPON) network upgrade to next-generation passive optical network (Next Generation PON, NG-PON),
Because they use different transmission wavelengths respectively, in the transitional period of system upgrade, there is GPON simultaneously in access network architecture
And NG-PON.Current solution is that optical wavelength multiplex, partial wave multiplexing equipment are added in optical link, adds answering for system
Polygamy, it is unfavorable for the smooth upgrade of total system.
GPON, which is upgraded to NG-PON, at present can use external wave multiplexer scheme.The program need to increase NG-PON line cards, outer
The corollary equipments such as wave multiplexer and jumping fiber are put, construction cost is high, and system construction and wiring are complicated, and management service is difficult.Another kind solution
Certainly scheme is that its feature is optical line terminal (Optical by the way of association's EPON (COMBO-PON)
Line Terminal, OLT) module simultaneously compatible GPON and NG-PON network signal.Therefore the existing network equipment is borrowed
With fiber distribution network, it is not necessary to newly-increased corollary equipment, it is only necessary to which the line card for replacing OLT ends can be achieved with network upgrade.
OLT optical assembly is only that single channel transmitting and single channel receive structure at present, because used in GPON and NG-PON
Wavelength simultaneously differs, and the OLT based on current existing optical assembly can only solely meet GPON or NG-PON communication requirement, and
Existing two kinds of optical network units (Optical Network Unit, ONU) can not be taken into account in network.If by external
The mode of wavelength division multiplexer set up new network structure, the quantitative proportion of OLT ends GPON and NG-PON modules can not be random
Change, causes networking mode underaction, is unfavorable for further upgrading.
The content of the invention
In view of this, the embodiment of the present application provides a kind of optical assembly and optical line terminal, to solve OLT in the prior art
Optical assembly incompatible GPON and NG-PON so that the technical problem that network upgrade complexity is strong, cost is high.
The one side of the embodiment of the present application, there is provided a kind of optical assembly, including：Transmitter unit, WDM device,
One receiver, the second receiver, lens element and optical fiber interface；WDM device, lens element and optical fiber interface are set successively
It is placed in the light exit direction of transmitter unit；Transmitter unit is used to launch the light comprising first wave length and second wave length；Lens cells
Part is used to the light comprising first wave length and second wave length being coupled to optical fiber interface, by the up of the 3rd wavelength and the 4th wavelength
Signal is subject to optical beam transformation；
WDM device realizes total transmissivity relative to the light of first wave length and second wave length, relative to by the 3rd wavelength
Light beam splitting is realized with the light of the 4th wavelength, the light of the light of the 3rd wavelength and the 4th wavelength is respectively coupled to the first reception
Device and the second receiver.
Preferably, WDM device is interference thin film type beam splitting arrangement, including multiple optical filters.
In one embodiment, interference thin film type beam splitting arrangement includes the first optical filter and the second optical filter；First filters
Piece realizes total reflection to the light of the 3rd wavelength, the light of the 3rd wavelength is coupled into the first receiver, to the light of the 4th wavelength
Line realizes total transmissivity, and the light of the 4th wavelength is transmitted through into the second optical filter；Second optical filter is realized to the light of the 4th wavelength
Total reflection, is coupled to the second receiver by the light of the 4th wavelength.
Preferably, the light incident direction of the first receiver is perpendicular to the optical axis of optical assembly, and interference thin film type beam splitting arrangement is also
Including the 3rd optical filter；The light of the 3rd wavelength by the total reflection of the first optical filter is totally reflected by the 3rd optical filter again, from
And it is coupled to the first receiver.
In one embodiment, interference thin film type beam splitting arrangement includes the first optical filter, the second optical filter, the 3rd optical filter
With the 4th optical filter；First optical filter is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected；Second optical filter is calibrated
On the total reflection direction of the first optical filter, it can realize its light to the 3rd wavelength relative to the angle of inclination of optical axis
It is totally reflected and the light of the 3rd wavelength is all-trans and is emitted back towards the first optical filter and realizes second of total reflection in the first optical filter, the
Two optical filters realize total transmissivity to the light of the 4th wavelength, and the light of the 4th wavelength is coupled into the second receiver；3rd filters
Piece is aligned on second of total reflection direction of the first optical filter, and it can make it to the 3rd relative to the angle of inclination of optical axis
The light of wavelength realizes total reflection；4th optical filter is aligned on the total reflection direction of the 3rd optical filter, to the 3rd wavelength
Light realizes total transmissivity, and the light of the 3rd wavelength is coupled into the first receiver.
In one embodiment, interference thin film type beam splitting arrangement includes the first optical filter, the second optical filter, the 3rd optical filter
With the 4th optical filter；First optical filter is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected；Second optical filter is calibrated
On the total reflection direction of the first optical filter, it can make it to the 3rd wavelength and the 4th wavelength relative to the angle of inclination of optical axis
Light realize total reflection；3rd optical filter is aligned on the total reflection direction of the second optical filter, and it inclines relative to optical axis
Rake angle can be realized to the 3rd wavelength and be totally reflected and realize total transmissivity to the 4th wavelength, by the light of the 4th wavelength coupled to the
Two receivers；4th optical filter is aligned on the total reflection direction of the 3rd optical filter, and full impregnated is realized to the light of the 3rd wavelength
Penetrate, the light of the 3rd wavelength is coupled to the first receiver.
In one embodiment, transmitter unit includes：First laser device, second laser, the 5th optical filter and isolator；
First laser device is used for the light for launching first wave length, and second laser is used for the light for launching second wave length；5th optical filter
Total transmissivity is realized to the light of first wave length, total reflection is realized to the light of second wave length, by first wave length and second wave length
Light is coupled to equidirectional, is exported after isolator is isolated from transmitter unit.
Preferably, the encapsulation of first laser device, second laser, the first receiver and the second receiver is sealed using TO-CAN
Dress.
Preferably, the light exit direction of second laser is perpendicular to the optical axis of optical assembly, the folder of the 4th optical filter and optical axis
Angle is 45 °.
In one embodiment, transmitter unit includes：First smooth transmitting chip, the second smooth transmitting chip, the first lens,
Two lens, total-reflection prism group and isolator；First lens, the second lens are respectively arranged at the first smooth transmitting chip and the second light
The light exit direction of transmitting chip, for the emergent light of the first smooth transmitting chip and the second smooth transmitting chip to be transformed into light respectively
Line simultaneously incides the total-reflection prism group so as to be coupled as Ray Of Light respectively, from the hair after isolator is isolated
Penetrate unit output.
Preferably, the encapsulation of transmitter unit is encapsulated using BOX, and the encapsulation of the first receiver and the second receiver uses TO-
CAN is encapsulated.
In one embodiment, the light of first wave length is NG-PON downstream signal, and the light of second wave length is GPON
Downstream signal, the light of the 3rd wavelength is NG-PON upward signal, and the light of the 4th wavelength is GPON upward signal.
Preferably, optical fiber interface is single fiber bi-directional interface.
The other side of the embodiment of the present application, there is provided a kind of optical line terminal (OLT), including appoint in above-described embodiment
Anticipate a kind of optical assembly.
The beneficial effect of the embodiment of the present application includes：The optical assembly and optical line terminal that the embodiment of the present application provides, can be same
When compatibility GPON and NG-PON, while two kinds of ONU corresponding to taking into account in network are advantageous to GPON systems to the flat of NG-PON systems
Sliding level, reduce the quantity of OLT in light networking, add the flexibility ratio of COMBO-PON system deployments.
Brief description of the drawings
By the description to the embodiment of the present application referring to the drawings, the above-mentioned and other purpose of the application, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 2 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 3 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 4 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 5 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 6 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 7 is the engineering schematic diagram of the embodiment of the present application optical assembly；
Fig. 8 is the principle schematic for the optical assembly that the embodiment of the present application provides；
Fig. 9 is the engineering schematic diagram of the embodiment of the present application optical assembly；
Figure 10 is the embodiment of the present application COMBO PON system schematic diagrames.
Embodiment
The application is described below based on embodiment, but the application is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in the detailed description of the application.Do not have for a person skilled in the art
The description of these detail sections can also understand the application completely.In order to avoid obscuring the essence of the application, known method, mistake
The not narration in detail of journey, flow, element and circuit.
In addition, it should be understood by one skilled in the art that provided herein accompanying drawing be provided to explanation purpose, and
What accompanying drawing was not necessarily drawn to scale.
It will also be appreciated that in the following description, " circuit " refers to be passed through by least one element or sub-circuit electric
The galvanic circle that connection or electromagnetism connect and compose." connected when claiming element or another element of circuit " being connected to " or element/circuit
" between two nodes when, it can directly be coupled or be connected to another element or there may be intermediary element, element it
Between connection can be physically, in logic or its combination.On the contrary, " connect when title element " being directly coupled to " or directly
Be connected to " another element when, it is meant that intermediary element is not present in both.
Unless the context clearly requires otherwise, otherwise entire disclosure is similar with the " comprising " in claims, "comprising" etc.
Word should be construed to the implication included rather than exclusive or exhaustive implication；That is, it is containing for " including but is not limited to "
Justice.
In the description of the present application, it is to be understood that term " first ", " second " etc. are only used for describing purpose, without
It is understood that to indicate or implying relative importance.In addition, in the description of the present application, unless otherwise indicated, the implication of " multiple "
It is two or more.
The optical assembly and OLT that the embodiment of the present application provides, by applied to GPON and NG-PON ballistic device and reception
Device is integrated together, while the transmission signal including two-way different wave length and the reception signal of two-way different wave length, is made respectively
For GPON and NG-PON descending, upward signal, so that optical assembly and OLT comprising the optical assembly being capable of compatible GPON simultaneously
And NG-PON, the scene for being applicable to COMBO-PON and the upgrading and maintenance of being easy to network.
Fig. 1 is the optical assembly that the embodiment of the present application provides, including：Transmitter unit 1, WDM device 2, the first receiver
3rd, the second receiver 4, lens element 5 and optical fiber interface 6.Wherein, WDM device 2, lens element 5 and optical fiber interface 6 according to
The secondary light exit direction for being arranged at transmitter unit 1.Transmitter unit 1 is used to launch the light comprising first wave length and second wave length；
Lens element 5 is used to the light comprising first wave length and second wave length being coupled to optical fiber interface 6 and includes the to optical fiber interface 6
The reception signal of three wavelength and the 4th wavelength is subject to optical beam transformation.
WDM device 2 realizes total transmissivity relative to the light of first wave length and second wave length, relative to by the 3rd ripple
Long and the 4th wavelength light realizes light beam splitting, and the light of the light of the 3rd wavelength and the 4th wavelength is respectively coupled into first connects
Receive the receiver 4 of device 3 and second.The inside of interference thin film type beam splitting arrangement 2 includes multiple optical filters, and multiple optical filters are relative to optical axis
Angle of inclination can be the same or different, to realize total reflection or the total transmissivity to different wave length light respectively, so as to
Reach the beam splitting effect of light.
When the optical assembly launches optical signal, transmitter unit 1 sends the light comprising first wave length and second wave length and incidence
To WDM device 2, by realizing total transmissivity during WDM device 2 and inciding lens element 5.Lens element 5 is vertical
In the optical assembly optical axis and be centrally located on optical axis, it is convex lens towards the side of transmitter unit 1, will can be included
The light of first wave length and second wave length is coupled to optical fiber interface 6.
When the optical assembly receives optical signal, the reception signal of optical fiber interface 6 includes the 3rd wavelength and the 4th wavelength, by saturating
The optical beam transformation of mirror element 5 incides WDM device 2.WDM device 2 is by the light and the 4th wavelength of the 3rd wavelength
Light separation, be respectively coupled to corresponding to different receivers (i.e. the first receiver 3 and the second receiver 4).
The transmission signal (first wave length and second wave length) comprising two-way different wave length is different with two-way simultaneously for the optical assembly
The reception signal (the 3rd wavelength and the 4th wavelength) of wavelength, so as to the downstream signal respectively as GPON and NG-PON and upper
Row signal, is applied in COMBO-PON scene.For example, wherein first wave length is 1577nm, the descending letter as NG-PON
Number, second wave length 1490nm, as GPON downstream signal, the 3rd wavelength is 1270nm, as NG-PON upward signal,
4th wavelength is 1310nm, the upward signal as GPON.
Preferably, WDM device 2 is interference thin film type beam splitting arrangement, and inside includes multiple optical filters, multiple optical filterings
Piece be able to can also be differed relative to the angle of inclination of optical axis with identical, to realize the total reflection to different wave length light respectively
Or total transmissivity, so as to reach spectrophotometric result.
In one embodiment, as shown in Fig. 2 interference thin film type beam splitting arrangement further comprises the first optical filter 21 and
Two optical filters 22.
When optical assembly launches optical signal, for the light comprising first wave length and second wave length from transmitter unit 1, the
One optical filter 21 and the second optical filter 22 can realize total transmissivity.
When optical assembly receives optical signal, the light for including the 3rd wavelength and the 4th wavelength, the first optical filter 21 is to the
The light of four wavelength realizes total transmissivity, total reflection is realized to the light of the 3rd wavelength, so as to which the light of the 3rd wavelength be coupled to
First receiver 3.The light of 4th wavelength is realized after the first optical filter 21 realizes total transmissivity in the second optical filter 22 to be all-trans
Penetrate, so as to which the light of the 4th wavelength is coupled into the second receiver 4.
In identical medium, the bigger refractive index of wavelength of light is smaller, and it is totally reflected critical in the medium
Angle is then bigger.If therefore realizing above-mentioned spectrophotometric result, the first optical filter 21 and the second optical filter 22 are that half-reflection and half-transmission type filters
Piece, the reflective surface of the two towards lens element 5 and medium rate it is identical, the 4th wavelength should be greater than the 3rd wavelength, so as in incidence
In the first optical filter 21, by the smaller light total reflection of wavelength, (incidence angle has reached the critical of the 3rd wavelength in the case of the identical of angle
Angle, but the not up to critical angle of the 4th wavelength), while by the larger light total transmissivity of wavelength.The light of 4th wavelength is first
After optical filter 21 realizes total transmissivity, direction does not change, and is totally reflected to be realized in the second optical filter 22, and it filters second
The incidence angle of piece 22 should suitably increase, thus the angle between the second optical filter 22 and optical axis need it is smaller than the first optical filter 21
(i.e. the second optical filter 22 more tilts to horizontal direction).
Interference thin film type beam splitting arrangement in the present embodiment is not only divided uniformly, and compact-sized, small volume, Bu Huizhan
With very big installing space.
In one embodiment, as shown in figure 3, interference thin film type beam splitting arrangement further comprises the first optical filter 21,
Two optical filters 22 and the 3rd optical filter 23.Light of the light incident direction of first receiver 3 and the second receiver 4 perpendicular to optical assembly
Axle, the light incident direction of receiver is set to the more compact structure that can make optical assembly perpendicular to optical axis, is more beneficial for realizing light
The miniaturization of component.
Wherein the first optical filter 21, the setting principle of the second optical filter 22 are identical with a upper embodiment.For incidence angle more
The light of the 4th big wavelength, it is (i.e. corresponding when making its direction calibration after the total reflection of the second optical filter 22 be perpendicular to optical axis
The second receiver 4 light incident direction perpendicular to optical axis), the light of the 3rd wavelength has a case that identical incidence angle
Under, the direction after being totally reflected at the first optical filter 21 is difficult to be calibrated to perpendicular to the direction of optical axis, it is therefore desirable to sets the again
Three optical filters 23, the light of the 3rd wavelength is set total reflection to occur again and by the direction school after its full transmitting in the 3rd optical filter 23
Standard is arrived perpendicular to optical axis, so that the light incident direction of the first receiver 3 can also be set perpendicular to optical axis, makes the knot of optical assembly
Structure is compacter, helps to realize miniaturization.
In one embodiment, as shown in figure 4, interference thin film type beam splitting arrangement further comprises the first optical filter 21,
Two optical filters 22, the 3rd optical filter 23 and the 4th optical filter.
When optical assembly launches optical signal, for the light comprising first wave length and second wave length from transmitter unit 1, the
One optical filter 21 can realize total transmissivity.
When optical assembly receives optical signal, the first optical filter 21 is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected.
Second optical filter 22 is aligned on the total reflection direction of the first optical filter 21, and it can make it relative to the angle of inclination of optical axis
Total reflection is realized to the light of the 3rd wavelength and the light of the 3rd wavelength is all-trans and is emitted back towards the first optical filter 21 and in the first filter
Mating plate 21 is realized second and is totally reflected.Meanwhile second optical filter 22 total transmissivity is realized to the light of the 4th wavelength, by the 4th wavelength
Light be coupled to the second receiver 4.3rd optical filter 23 is aligned on second of total reflection direction of the first optical filter 21,
It can make its light to the 3rd wavelength realize total reflection relative to the angle of inclination of optical axis.4th optical filter 24 is aligned in
On the total reflection direction of 3rd optical filter 23, total transmissivity is realized to the light of the 3rd wavelength, the light of the 3rd wavelength is coupled to
First receiver 3.
In the present embodiment, by improving the modes of emplacement of optical filter, the first optical filter 21 is shortened between lens element 5
Distance, shorten the length of interference thin film type beam splitting arrangement in the direction of the optical axis, be advantageous to further reduce optical assembly it is whole
Body structure length.
In one embodiment, as shown in figure 5, interference thin film type beam splitting arrangement further comprises the first optical filter 21,
Two optical filters 22, the 3rd optical filter 23 and the 4th optical filter.
When optical assembly launches optical signal, for the light comprising first wave length and second wave length from transmitter unit 1, the
One optical filter 21 can realize total transmissivity.
When optical assembly receives optical signal, the first optical filter 21 is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected.
Second optical filter 22 is aligned on the total reflection direction of the first optical filter 21, and it can make it relative to the angle of inclination of optical axis
The light of 3rd wavelength and the 4th wavelength is realized and is totally reflected.3rd optical filter 23 is aligned in the total reflection of the second optical filter 22
On direction, it can be realized relative to the angle of inclination of optical axis to the 3rd wavelength is totally reflected and realizes total transmissivity to the 4th wavelength,
The light of 4th wavelength is coupled to the second receiver 4.4th optical filter 24 is aligned in the total reflection side of the 3rd optical filter 23
Upwards, total transmissivity is realized to the light of the 3rd wavelength, the light of the 3rd wavelength is coupled to the first receiver 3.
In the present embodiment, by improving the modes of emplacement of optical filter, the first optical filter 21 is shortened between lens element 5
Distance, shorten the length of interference thin film type beam splitting arrangement in the direction of the optical axis, be advantageous to further reduce optical assembly it is whole
Body structure length.
In one embodiment, as shown in fig. 6, transmitter unit 1 further comprises first laser device 11, second laser
12nd, the 5th optical filter 13 and isolator 14.Wherein, first laser device 11 is used for the light for launching first wave length, second laser
12 light for launching second wave length.First laser device 11 is different with the light exit direction of second laser 12.First wave length
Light the optical axis for being oriented parallel to optical assembly, the 5th optical filter 13 realizes total transmissivity, the second ripple to the light of first wave length
Long light incides the 5th optical filter 13 and is totally reflected in the 5th optical filter 13 at a certain angle, the direction after total reflection
It is identical with the light of first wave length, it is identical so as to be calibrated to the light of first wave length and second wave length using the 5th optical filter 13
Direction, and exported after isolator 14 from transmitter unit 1.
Preferably, the light exit direction of second laser 12 is perpendicular to the optical axis of optical assembly, the 5th optical filter 13 and optical axis
Angle be 45 °, make the light full impregnated in the direction and first wave length of the light of second wave length after the total reflection of the 5th optical filter 13
Direction after penetrating is identical.
The encapsulation of first laser device 11 and second laser 12 in the present embodiment in transmitter unit 1 uses coaxial window
Formula (Transistor Out-line window-can, TO-CAN) encapsulates.The first receiver 3 and second in optical assembly receives
Device 4 is encapsulated using TO-CAN.Engineering schematic diagram after the optical assembly encapsulation of the present embodiment is as shown in Figure 7.
In one embodiment, as shown in figure 8, transmitter unit 1 further comprises the first smooth transmitting chip 15, the second light hair
Core shooting piece 16, the first lens 17, the second lens 18, total-reflection prism group 19 and isolator 14.Wherein, the first smooth transmitting chip 15
Emergent light there is first wave length, the emergent light of the second smooth transmitting chip 16 has second wave length.
First lens 17 are arranged at the light exit direction of the first smooth transmitting chip 15, and the second lens 18 are arranged at the second light hair
The light exit direction of core shooting piece 16, it is respectively used to the emergent light conversion of the first smooth 15 and second smooth transmitting chip 16 of transmitting chip
Incide for light and respectively total-reflection prism group 19.Total-reflection prism group 19 is made up of multiple isosceles triangle prisms, by
The light of one wavelength and the light of second wave length are coupled as Ray Of Light, then from transmitter unit after isolator 14 is isolated
1 output.
Transmitter unit 1 in the present embodiment is connect using box body type (BOX) encapsulation, the first receiver 3 of optical assembly and second
Device 4 is received to encapsulate using TO-CAN.Transmitter unit 1 is more beneficial for radiating using BOX encapsulation, reduced needed for light transmitting chip
The power consumption of semiconductor cooler.Engineering schematic diagram after the optical assembly encapsulation of the present embodiment is as shown in Figure 9.
In the various embodiments described above, first laser device 11 is Electroabsorption Modulated Laser (Electro-absorption
Modulated Laser, EML), second laser 12 is distributed feedback laser (Distribution Feedback
Laser, DFB).First smooth transmitting chip 15 is EML chips, and the second smooth transmitting chip 16 is DFB chips.The He of first receiver 3
Second receiver 4 is the optical receiver based on avalanche photodide (avalanche photodiode, APD).Optical fiber interface 6
For single fiber bi-directional interface, and the double receipts of double hairs of single fiber are realized using the wavelength-division multiplex technique based on PLC, i.e., in an optical fiber
In can have the light emission signal of two-way different wave length and the light receiving signal of two-way different wave length simultaneously, so as to beneficial to save light
Fine resource.
The optical assembly that above-described embodiment provides, which can be integrated into, meets SFP (Small Form-factor
Pluggables) optical module of standard or SFP+ standards and application in the olt.The OLT can be applied to COMBO PON scenes, such as
Shown in Figure 10, OLT is connected to Optical Distribution Network (Optical Distribution Network, ODN), and ODN is by GPON signals
GPON multiple ONU corresponding to being assigned to, NG-PON signals are assigned to corresponding NG-PON multiple ONU.Wherein light all the way
Transmission signal and all the way light receiving signal carry GPON descending, upward signal, another way light emission signal and another way respectively
Light receiving signal carries NG-PON descending, upward signal respectively.So as to realize OLT compatible GPON and NG-PON simultaneously, favorably
Smooth upgrade in from GPON systems to NG-PON systems, reduce the quantity of OLT in light networking, add the flexible of system deployment
Degree.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for those skilled in the art
For, the application can have various changes and change.All any modifications made within spirit herein and principle, it is equal
Replace, improve etc., it should be included within the protection domain of the application.
Claims (14)
1. a kind of optical assembly, including：Transmitter unit, WDM device, the first receiver, the second receiver, lens element and
Optical fiber interface；
WDM device, lens element and optical fiber interface are set in turn in the light exit direction of transmitter unit；Transmitter unit is used
In light of the transmitting comprising first wave length and second wave length；Lens element is used for the light that will include first wave length and second wave length
It is coupled to optical fiber interface, the upward signal of the 3rd wavelength and the 4th wavelength is subject to optical beam transformation；
WDM device realizes total transmissivity relative to the light of first wave length and second wave length, relative to by the 3rd wavelength and
The light of four wavelength realizes light beam splitting, by the light of the light of the 3rd wavelength and the 4th wavelength be respectively coupled to the first receiver and
Second receiver.
2. optical assembly according to claim 1, the WDM device is interference thin film type beam splitting arrangement, including multiple
Optical filter.
3. optical assembly according to claim 2, it is characterised in that the interference thin film type beam splitting arrangement includes first and filtered
Piece and the second optical filter；
First optical filter realizes total reflection to the light of the 3rd wavelength, and the light of the 3rd wavelength is coupled into the first receiver, right
The light of 4th wavelength realizes total transmissivity, and the light of the 4th wavelength is transmitted through into the second optical filter；Second optical filter is to the 4th ripple
Long light realizes total reflection, and the light of the 4th wavelength is coupled into the second receiver.
4. optical assembly according to claim 3, it is characterised in that the light incident direction of first receiver is perpendicular to institute
The optical axis of optical assembly is stated, the interference thin film type beam splitting arrangement also includes the 3rd optical filter；
The light of the 3rd wavelength by the total reflection of the first optical filter is totally reflected by the 3rd optical filter again, is thereby coupled to first
Receiver.
5. optical assembly according to claim 2, it is characterised in that the interference thin film type beam splitting arrangement includes first and filtered
Piece, the second optical filter, the 3rd optical filter and the 4th optical filter；
First optical filter is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected；Second optical filter is aligned in the first optical filtering
On the total reflection direction of piece, its relative to the angle of inclination of optical axis can make its light to the 3rd wavelength realize total reflection and
Make the light of the 3rd wavelength be all-trans to be emitted back towards the first optical filter and realize second of total reflection, the second optical filter pair in the first optical filter
The light of 4th wavelength realizes total transmissivity, and the light of the 4th wavelength is coupled into the second receiver；3rd optical filter is aligned in
On second of total reflection direction of the first optical filter, it can make its light to the 3rd wavelength relative to the angle of inclination of optical axis
Realize total reflection；4th optical filter is aligned on the total reflection direction of the 3rd optical filter, and the light of the 3rd wavelength is realized entirely
Transmission, the first receiver is coupled to by the light of the 3rd wavelength.
6. optical assembly according to claim 2, it is characterised in that the interference thin film type beam splitting arrangement includes first and filtered
Piece, the second optical filter, the 3rd optical filter and the 4th optical filter；
First optical filter is realized to the light of the 3rd wavelength and the 4th wavelength and is totally reflected；Second optical filter is aligned in the first optical filtering
On the total reflection direction of piece, it can make it realize the light of the 3rd wavelength and the 4th wavelength relative to the angle of inclination of optical axis
Total reflection；3rd optical filter is aligned on the total reflection direction of the second optical filter, and it can relative to the angle of inclination of optical axis
3rd wavelength is realized and is totally reflected and total transmissivity is realized to the 4th wavelength, the light of the 4th wavelength is coupled to the second receiver；
4th optical filter is aligned on the total reflection direction of the 3rd optical filter, total transmissivity is realized to the light of the 3rd wavelength, by the 3rd
The light of wavelength is coupled to the first receiver.
7. optical assembly according to claim 1, it is characterised in that the transmitter unit includes：First laser device, second swash
Light device, the 5th optical filter and isolator；
First laser device is used for the light for launching first wave length, and second laser is used for the light for launching second wave length；5th filter
Mating plate realizes total transmissivity to the light of first wave length, total reflection is realized to the light of second wave length, by first wave length and the second ripple
Long light is coupled to equidirectional, is exported after isolator is isolated from the transmitter unit.
8. optical assembly according to claim 7, it is characterised in that the first laser device, second laser, first receive
The encapsulation of device and the second receiver is encapsulated using TO-CAN.
9. optical assembly according to claim 7, it is characterised in that the light exit direction of the second laser is perpendicular to institute
The optical axis of optical assembly is stated, the angle of the 5th optical filter and the optical axis is 45 °.
10. optical assembly according to claim 1, it is characterised in that the transmitter unit includes：First smooth transmitting chip,
Second smooth transmitting chip, the first lens, the second lens, total-reflection prism group and isolator；
First lens, the second lens are respectively arranged at the light exit direction of the first smooth transmitting chip and the second smooth transmitting chip, use
In the emergent light of the first smooth transmitting chip and the second smooth transmitting chip is transformed into collimated light respectively and incided respectively described complete
Reflecting prism group exports so as to be coupled as a branch of collimated light after isolator is isolated from the transmitter unit.
11. optical assembly according to claim 10, it is characterised in that the encapsulation of the transmitter unit is encapsulated using BOX, the
The encapsulation of one receiver and the second receiver is encapsulated using TO-CAN.
12. optical assembly according to claim 1, it is characterised in that the light of the first wave length is the descending of NG-PON
Signal, the light of second wave length are GPON downstream signal, and the light of the 3rd wavelength is NG-PON upward signal, the 4th wavelength
Light be GPON upward signal.
13. optical assembly according to claim 1, it is characterised in that the optical fiber interface is single fiber bi-directional interface.
14. a kind of optical line terminal (OLT), it is characterised in that including the optical assembly described in claim 1 to 13 any one.
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Effective date of registration: 20240418 Address after: 518000 a1706, Shenzhen national engineering laboratory building, No. 20, Gaoxin South seventh Road, high tech Zone community, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Yingu Jianke Network Co.,Ltd. Country or region after: China Patentee after: Shenzhen Iridium Semiconductor Technology Co.,Ltd. Address before: 215024 301A, Building 13, Xibei District, Suzhou Nano City, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou, Jiangsu Province Patentee before: SUZHOU YIRUI OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Country or region before: China |