CN202025112U - Mode coupling optical assembly - Google Patents
Mode coupling optical assembly Download PDFInfo
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- CN202025112U CN202025112U CN2011201216221U CN201120121622U CN202025112U CN 202025112 U CN202025112 U CN 202025112U CN 2011201216221 U CN2011201216221 U CN 2011201216221U CN 201120121622 U CN201120121622 U CN 201120121622U CN 202025112 U CN202025112 U CN 202025112U
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- optical
- collimator array
- mode coupling
- light
- photodetector
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Abstract
The utility model provides a mode coupling optical assembly, which is applicable to the field of optical communication and comprises a collimator array, an aspherical lens and a photoelectric detector, wherein optical signals sent by each path of optical fiber are collimated into parallel light by the collimator array, and the collimated parallel light is gathered onto the photoelectric detector by the aspherical lens. The collimator array needs to meet the requirement that the cross section of outlet light beams is smaller than the clear aperture of the aspherical lens, and in addition, the gathering angle after the aspherical lens gathering needs to be accordant to the numerical aperture of the photoelectric detector. In the embodiment of the utility model, multiple paths of optical signals transmitted through optical nodes are coupled onto the photoelectric detector of an optical receiving assembly of optical cable terminal equipment in a low optical power loss way by the mode coupling optical assembly, the additional loss caused by an optical coupler is avoided, and the optical power budgeting in an optical fiber transmission network is improved, so the splitting ratio of a passive optical fiber network is favorably increased, and the transmission distance is increased.
Description
Technical field
The utility model belongs to optical communication field, relates in particular to a kind of Mode Coupling optical assembly.
Background technology
At present, passive optical-fiber network (the Passive Optical Network that FTTx is used, PON) framework, be to pass through optical passive component---photo-coupler (Coupler or PLC), (Optical Network Unit ONU) transmits the light signal that comes and is coupled to an Optical Fiber Transmission, and then is coupled to optical fiber cable termination equipment (Optical Line Terminal with the multirouting optical node, OLT), see also Fig. 1.
Passing through optical passive component---photo-coupler is realized the light signal that multirouting ONU transmission comes is coupled to an Optical Fiber Transmission, optical power loss is very serious during coupling, 4 the tunnel close the luminous power of the about 7dB of 1 path loss consumption, 8 the tunnel close the luminous power of the about 10dB of 1 path loss consumption, and the relation of its optical power loss PL and ONU quantity N is: PL=3*Log2(N)+and 1dB.And it is limited to be used for light signal emitted laser device emission luminous power at the ONU end, be+2---+7dBm, and that OLT is used for the sensitivity of the photodetector that light signal receives is also limited, be-36----28dBm, because light signal transmits certain distance or is divided into multiple signals in optical fiber, the capital makes light signal weak, it is the optical power loss on the optical fiber link, especially the added losses that bring of photo-coupler coupling, the quantity of the ONU that transmission range that can serious restriction light signal or OLT can divide.
The utility model content
In order to solve the problems of the technologies described above, the purpose of the utility model embodiment is to provide a kind of Mode Coupling optical assembly.
The utility model embodiment is achieved in that a kind of Mode Coupling optical assembly, comprises collimator array, non-globe lens and photodetector,
Described collimator array is collimated into directional light with the light signal that each road optical fiber emits, and the directional light after described non-globe lens will collimate converges on the photodetector,
Described collimator array must satisfy the clear aperature of the whole xsect of its outgoing beam less than non-globe lens, and converges the numerical aperture that its convergence angle of back need satisfy photodetector through non-globe lens,
The collimation Gaussian beam that the combination of described collimator array and non-globe lens must be satisfied each road outgoing after non-globe lens conversion its waist radius less than the radius of photodetector useful area.
Further, described Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter, lens arra and laser array,
The directional light of described collimator array output is coupled to photodetector through non-globe lens again through described wavelength-division multiplex optical filter reflection;
The light signal of described laser array emission collimates through described lens arra, through the transmission of wavelength-division multiplex optical filter, through the optical fiber that is coupled into of collimator array, is transferred to far-end again.
Further, described Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter, lens, light splitting piece group and laser array,
The directional light of described collimator array output is coupled to photodetector through non-globe lens again through described wavelength-division multiplex optical filter reflection;
The light signal of described laser array emission carries out beam split through the light splitting piece group again through collimated, again through the transmission of wavelength-division multiplex optical filter, through the optical fiber that is coupled into of collimator array, is transferred to far-end again.
Further, described light splitting piece group comprises four light splitting pieces, and the beam split ratio (R:T) of first light splitting piece is 3:1, and the beam split ratio (R:T) of second light splitting piece is 1:2, the beam split ratio (R:T) of the 3rd light splitting piece is 1:1, and the beam split ratio (R:T) of the 4th light splitting piece is 1:0.
In embodiment of the present utility model, the light signal that this Mode Coupling optical assembly comes multirouting optical node transmission is coupled in the mode of low optical power loss on the photodetector of optical fiber receive module of optical fiber cable termination equipment, the added losses of having avoided photo-coupler to bring, improved the optical power budget in the optical fiber transmission network, thereby help passive optical-fiber network to increase splitting ratio, increase transmission range.
Description of drawings
Fig. 1 is the Organization Chart of the passive optical-fiber network that provides of prior art;
Fig. 2 is the light path principle figure of the Mode Coupling optical assembly that provides of the utility model first embodiment;
Fig. 3 is the light path principle figure of the Mode Coupling optical assembly that provides of the utility model second embodiment;
Fig. 4 is the light path principle figure of the Mode Coupling optical assembly that provides of the utility model the 3rd embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 2 shows the light path principle of the Mode Coupling optical assembly that the utility model first embodiment provides, and this Mode Coupling optical assembly comprises collimator array 11, non-globe lens 12 and photodetector 13.Described collimator array 11 is collimated into directional light with the light signal that each road optical fiber 10 emits, and the directional light after described non-globe lens 12 will collimate converges on the photodetector 13.
In the present embodiment, photo-coupler and optical fiber receive module are packaged together.Be implemented as follows: earlier by lens arra of collimator array 11() will be collimated into directional light from the light signal that each road optical fiber 10 emits, by a suitable non-globe lens 12 all collimated lights are converged on the photodetector 13 together again.Because photodetector 13 has bigger photosurface and bigger numerical aperture, can make each road all very little to the optical loss of photodetector 13.For example: 4 close 1 less than 1dB, and 8 close 1 and 16 closes 1 less than 2dB, thereby make farther that light signal can transmit.And the array arrangement mode of collimator array can be any, but must satisfy the clear aperature of the xsect of its outgoing beam less than non-globe lens 12, and converge the numerical aperture that its convergence angle of back need satisfy photodetector 13 through non-globe lens 12, and the spot size of the collimated light beam of each road outgoing is good with the parameter matching of non-globe lens 12, so that each road light beam is after non-globe lens 12 focuses on, its spot size is less than the photosurface size of photodetector 13.
Fig. 3 shows the light path principle of the Mode Coupling optical assembly that the utility model second embodiment provides, and this embodiment is on the basis of first embodiment, and photo-coupler and light emission, optical fiber receive module are packaged together.
That is to say this Mode Coupling optical assembly except that comprising collimator array 11, non-globe lens 12 and photodetector 13, this Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter 14, lens arra 15 and laser array 16.
The directional light of these collimator array 11 outputs is coupled to photodetector 13 through non-globe lens 12 again through described wavelength-division multiplex optical filter 14 reflections.The light signal of described laser array 16 emissions is through described lens arra 15 collimations, through 14 transmissions of wavelength-division multiplex optical filter, again through collimator array 11 be coupled into optical fiber 10, be transferred to far-end.Optical fiber end 10 is the collimator array 11 of N passage.Optical fiber receive module adopts non-globe lens 12 that all light signals are coupled to photodetector 13.And light emission component adopts N laser array 16, and collimates by the lens arra 15 of one group of N passage, through 14 transmissions of wavelength-division multiplex (WDM) optical filter, is coupled to the collimator array 11 of N passage, and transfers to far-end by optical fiber 10.
Fig. 4 shows the light path principle of the Mode Coupling optical assembly that the utility model the 3rd embodiment provides, and this embodiment is packaged together photo-coupler and light emission, optical fiber receive module on the basis of first embodiment.
That is to say this Mode Coupling optical assembly except that comprising collimator array 11, non-globe lens 12 and photodetector 13, this Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter 14, lens 18, light splitting piece group 17 and laser instrument 19.The directional light of these collimator array 11 outputs is coupled to photodetector 13 through non-globe lens 12 again through described wavelength-division multiplex optical filter 14 reflections.The light signal of described laser instrument 19 emissions carries out beam split through light splitting piece group 17 again through lens 18 collimations, again through 14 transmissions of wavelength-division multiplex optical filter, again through collimator array 11 be coupled into optical fiber 10, be transferred to far-end.
In the present embodiment, this light splitting piece group 17 comprises four light splitting pieces, the beam split ratio (R:T) of first light splitting piece is 3:1, the beam split ratio (R:T) of second light splitting piece is 1:2, the beam split ratio (R:T) of the 3rd light splitting piece is 1:1, and the beam split ratio (R:T) of the 4th light splitting piece is 1:0.
In embodiment of the present utility model, the light signal that this Mode Coupling optical assembly comes multirouting optical node transmission is coupled in the mode of low optical power loss on the photodetector of optical fiber receive module of optical fiber cable termination equipment, the added losses of having avoided photo-coupler to bring, improved the optical power budget in the optical fiber transmission network, thereby help passive optical-fiber network to increase splitting ratio, increase transmission range.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. a Mode Coupling optical assembly is characterized in that, comprises collimator array, non-globe lens and photodetector,
Described collimator array is collimated into directional light with the light signal that each road optical fiber emits, and the directional light after described non-globe lens will collimate converges on the photodetector,
Described collimator array must satisfy the clear aperature of the whole xsect of its outgoing beam less than non-globe lens, and converges the numerical aperture that its convergence angle of back need satisfy photodetector through non-globe lens,
The collimation Gaussian beam that the combination of described collimator array and non-globe lens must be satisfied each road outgoing after non-globe lens conversion its waist radius less than the radius of photodetector useful area.
2. Mode Coupling optical assembly according to claim 1 is characterized in that, described Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter, lens arra and laser array,
The directional light of described collimator array output is coupled to photodetector through non-globe lens again through described wavelength-division multiplex optical filter reflection;
The light signal of described laser array emission collimates through described lens arra, through the transmission of wavelength-division multiplex optical filter, through the optical fiber that is coupled into of collimator array, is transferred to far-end again.
3. Mode Coupling optical assembly according to claim 1 is characterized in that, described Mode Coupling optical assembly also comprises wavelength-division multiplex optical filter, lens, light splitting piece group and laser array,
The directional light of described collimator array output is coupled to photodetector through non-globe lens again through described wavelength-division multiplex optical filter reflection;
The light signal of described laser array emission carries out beam split through the light splitting piece group again through collimated, again through the transmission of wavelength-division multiplex optical filter, through the optical fiber that is coupled into of collimator array, is transferred to far-end again.
4. Mode Coupling optical assembly according to claim 3, it is characterized in that, described light splitting piece group comprises four light splitting pieces, the beam split ratio of first light splitting piece is 3:1, the beam split ratio of second light splitting piece is 1:2, the beam split ratio of the 3rd light splitting piece is 1:1, and the beam split ratio of the 4th light splitting piece is 1:0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201216221U CN202025112U (en) | 2011-04-22 | 2011-04-22 | Mode coupling optical assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201216221U CN202025112U (en) | 2011-04-22 | 2011-04-22 | Mode coupling optical assembly |
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| Publication Number | Publication Date |
|---|---|
| CN202025112U true CN202025112U (en) | 2011-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201216221U Expired - Lifetime CN202025112U (en) | 2011-04-22 | 2011-04-22 | Mode coupling optical assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183825A (en) * | 2011-04-22 | 2011-09-14 | 深圳市恒宝通光电子有限公司 | Mode coupling light assembly |
| CN107340574A (en) * | 2017-08-30 | 2017-11-10 | 中航海信光电技术有限公司 | Multichannel parallel light receiving assembly |
| CN108196339A (en) * | 2018-01-08 | 2018-06-22 | 北京大学 | A kind of on piece mode multiplexing demultiplexes device |
-
2011
- 2011-04-22 CN CN2011201216221U patent/CN202025112U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183825A (en) * | 2011-04-22 | 2011-09-14 | 深圳市恒宝通光电子有限公司 | Mode coupling light assembly |
| CN107340574A (en) * | 2017-08-30 | 2017-11-10 | 中航海信光电技术有限公司 | Multichannel parallel light receiving assembly |
| CN108196339A (en) * | 2018-01-08 | 2018-06-22 | 北京大学 | A kind of on piece mode multiplexing demultiplexes device |
| CN108196339B (en) * | 2018-01-08 | 2019-12-31 | 北京大学 | On-chip mode multiplexing and demultiplexing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HI-OPTEL OPTOELECTRONICS CO., LTD. Free format text: FORMER NAME: HENGBAOTONG PHOTOELECTRONICS CO., LTD., SHENZHEN CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518055 Guangdong city of Shenzhen province Nanshan District Longjing High Technology Park Building No. 2 Heng Po building Co-patentee after: Huawei Technologies Co., Ltd. Patentee after: SHENZHEN HI-OPTEL TECHNOLOGY CO., LTD. Address before: 518055 Guangdong city of Shenzhen province Nanshan District Longjing High Technology Park Building No. 2 Heng Po building Co-patentee before: Huawei Technologies Co., Ltd. Patentee before: Hengbaotong Photoelectronics Co., Ltd., Shenzhen City |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20111102 Effective date of abandoning: 20130320 |
|
| RGAV | Abandon patent right to avoid regrant |