CN204086607U - A kind of light transmitting-receiving subassembly - Google Patents
A kind of light transmitting-receiving subassembly Download PDFInfo
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- CN204086607U CN204086607U CN201420614110.2U CN201420614110U CN204086607U CN 204086607 U CN204086607 U CN 204086607U CN 201420614110 U CN201420614110 U CN 201420614110U CN 204086607 U CN204086607 U CN 204086607U
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Abstract
The utility model relates to optical communication technique, be specifically related to a kind of light transmitting-receiving subassembly, comprise pedestal, Optical Transmit Unit, light receiving unit, optical transmission unit and spectrophotometric unit, base interior offers cavity, Optical Transmit Unit is arranged on the first port of pedestal along primary optic axis, light receiving unit is arranged on the second port of pedestal along the second optical axis, primary optic axis and the second optical axis perpendicular, optical transmission unit is arranged on the 3rd port of pedestal along primary optic axis, spectrophotometric unit to be arranged in cavity and to be positioned at the infall of primary optic axis and the second optical axis, the one side of spectrophotometric unit relative light emission unit is a convex surface, the one side of the relative spectrophotometric unit of Optical Transmit Unit is a concave surface, inside cavity is formed with reflective groove around the region of light receiving unit, the incident light that cavity receives by reflective groove is directed away from this reflective groove and towards this light receiving unit.The utility model effectively prevents reflection ray reflect back into laser, guides emission of light into light receiving unit substantially.
Description
Technical field
The utility model relates to optical communication technique, is specifically related to a kind of light transmitting-receiving subassembly.
Background technology
Along with the extensive utilization of broadband access network, Access Network part is made to create serious bandwidth bottleneck.And the development of optical transport technology, the load-bearing capacity of Access Network is much improved.Compared with cable transmission, it is fast that optical transport has transfer rate, and the feature that transfer efficiency is high, becomes the first-selection of Access Network.Optical Access Network realizes the opto-electronic conversion of fiber-optic communication signals mainly through light transmitting-receiving subassembly, thus ensures the high-speed transfer of fiber-optic communication signals on optical fiber.Optical fiber cable Access Network is the first-selection of current broadband access network, and the technology of its most competitive power is EPON (PON) technology.PON comprises optical line terminal (the Optical Line Terminal being positioned at central office, OLT), multiple optical network unit (Optical Network Unit being positioned at user side, ONU) and one for carrying out the Optical Distribution Network (Optical Distribution Network, ODN) of branch/coupling or multiplex/demultiplex to the light signal between OLT and ONU.Wherein, OLT and ONU carries out up-downgoing data transmit-receive by being arranged on inner light transmitting-receiving subassembly (or being called data transmit-receive optical module).
Current light transmitting-receiving subassembly mainly comprises Optical Transmit Unit (laser instrument), spectrophotometric unit, optical fiber and light receiving unit, described spectrophotometric unit (light splitting piece/wave filter) is arranged between described Optical Transmit Unit and described optical fiber, described optical fiber is arranged on the transmission channels of described filter unit, described light receiving unit is arranged on the reflection channel of described filter unit, but because Optical Transmit Unit is consistent with the optical transmission direction in described optical fiber, the transmitted beam former road of unit antireflection part that can be split is caused to arrive among Optical Transmit Unit, and Optical Transmit Unit is comparatively responsive to this reflected light, probably therefore reduce output signal-to-noise ratio, wavelength shift even can be made to cause Optical Transmit Unit normally to work.For this reason, be usually between Optical Transmit Unit and spectrophotometric unit, increase isolator stop reflected light to arrive laser instrument, realize protection laser instrument, but such mode can increase cost of manufacture.And the bearing of trend that another kind of mode is design Optical Transmit Unit and described optical fiber has a default angle.By laser instrument and extension of optical fiber direction are placed at an angle, do not need the situation of isolator to be issued to make to enter the object that the reflected light in laser instrument reduces, but this mode needs to carry out manual calibration at fit on, although minimizing material cost, but can cost of labor be increased equally, and if angle too small, still have most of reflected light back and return laser instrument, angle is excessive, can cause the change in emission of light path and cannot be received by light receiving unit.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of light transmitting-receiving subassembly, by the transparent surface structure of spectrophotometric unit reasonable in design and Optical Transmit Unit, effectively prevent reflection ray reflect back into laser, simultaneously and coordinate the reflective groove structure of cavity reflections, guide emission of light into light receiving unit substantially, realization can either reduce reflected light and enter laser instrument, can reduce costs again, also avoid the loaded down with trivial details of angle calibration system.
In order to achieve the above object, the technical scheme that the utility model adopts is, a kind of light transmitting-receiving subassembly, comprise pedestal, Optical Transmit Unit, light receiving unit, optical transmission unit and spectrophotometric unit, described base interior offers cavity, described Optical Transmit Unit is arranged on the first port of pedestal along primary optic axis, described light receiving unit is arranged on the second port of pedestal along the second optical axis, described primary optic axis and the second optical axis perpendicular, described optical transmission unit is arranged on the 3rd port of pedestal along primary optic axis, described spectrophotometric unit to be arranged in cavity and to be positioned at the infall of described primary optic axis and the second optical axis, the one side of described spectrophotometric unit relative light emission unit is a convex surface, the one side of the relative spectrophotometric unit of described Optical Transmit Unit is a concave surface, described inside cavity is formed with reflective groove around the region of described light receiving unit, the incident light that described cavity receives is directed away from this reflective groove and towards this light receiving unit by described reflective groove.
Further, described reflective groove is coated with metal material layer, oxide skin(coating) or reflection horizon, effectively incident light can be guided to receiving element further.
Further, described reflective groove is arranged around the region around the second port in inside cavity.
Further, described spectrophotometric unit is wavelength division multiplexer, and the angle of described wavelength division multiplexer and primary optic axis is 45° angle.
Further, described Optical Transmit Unit is laser instrument, and described light receiving unit is photodiode.
Further, described laser instrument is directly coupled with wavelength division multiplexer.
Further, described convex surface also has one and is positioned at convex surface part near its central axis.
Further, described concave surface also has one and is positioned at concave part near its central axis.
Further, also comprise optical attenuation unit, described optical attenuation unit is arranged on pedestal along the second optical axis, and position is relative with light receiving unit.
The utility model is by adopting technique scheme, and compared with prior art, tool has the following advantages:
The utility model is by the transparent surface structure of spectrophotometric unit reasonable in design and Optical Transmit Unit, effectively prevent reflection ray reflect back into laser, simultaneously and coordinate the reflective groove structure of cavity reflections, emission of light is guided substantially into light receiving unit, realization can either reduce reflected light and enter laser instrument, can reduce costs again, also avoid the loaded down with trivial details of angle calibration system.
The utility model also designs correspondingly convex surface part and concave part on the convex surface of spectrophotometric unit and the concave surface of Optical Transmit Unit, effectively stops light reflection light echo transmitter unit further, reduces the interference to Optical Transmit Unit.
The utility model reasonable in design, removes the inconvenience such as artificial angle calibration system from, can Fast Installation and fixing, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present utility model.
Fig. 2 is the process schematic of the light transmitting-receiving subassembly output beam of embodiment of the present utility model.
Fig. 3 is the process schematic of the light transmitting-receiving subassembly receiving beam of embodiment of the present utility model.
Embodiment
Now with embodiment, the utility model is further illustrated by reference to the accompanying drawings.
As a specific embodiment, as shown in Figure 1, a kind of light transmitting-receiving subassembly, this transmitting-receiving subassembly may be used for acceptance/utilizing emitted light signal in OLT or ONU, comprise pedestal 1, Optical Transmit Unit 2, light receiving unit 3, optical transmission unit 4, spectrophotometric unit 5 and optical attenuation unit 6, described Optical Transmit Unit 2 is laser instruments 2, and described light receiving unit 3 is photodiodes 3.Described optical transmission unit 4 is optical fiber 4, and described spectrophotometric unit 5 is wavelength division multiplexer 5, and described laser instrument 2 is directly coupled with wavelength division multiplexer 5.Described optical attenuation unit 6 is the dynamic adjustable optical attenuator of MEMS (micro electro mechanical system) (MEMS).
Described pedestal 1 inside offers cavity, and described laser instrument 2 is arranged on the first port of pedestal 1 along primary optic axis, and primary optic axis is also horizontal optical axis, the namely horizontal optical path of light transmitting-receiving subassembly, and described wavelength division multiplexer 5 is 45° angle with the angle of primary optic axis.Described photodiode 3 is arranged on the second port of pedestal 1 along the second optical axis, described primary optic axis and the second optical axis perpendicular, then the second optical axis is the vertical optical path of light transmitting-receiving subassembly.In the present embodiment, described optical fiber 4 is arranged on the 3rd port of pedestal 1 along primary optic axis (horizontal optical path), certainly, and also can along the vertical optical path of described smooth transmitting-receiving subassembly by described optical fiber 4.
Described wavelength division multiplexer 5 to be arranged in cavity and to be positioned at the infall of described primary optic axis and the second optical axis, and the one side of described wavelength division multiplexer 5 relative laser device 2 is a convex surface 51, and described convex surface 51 also has one and is positioned at convex surface part 52 near its central axis.
The one side of the relative wavelength division multiplexer 5 of described laser instrument 2 is concave surface 21, and described concave surface 21 also has one and is positioned at concave part 22 near its central axis.
Described inside cavity is formed with reflective groove 7 around the region of described photodiode 3, and described reflective groove 7 is arranged around the region around the second port in inside cavity.Reflective in order to realize better, the xsect of described reflective groove 7 is right-angled trapezium, and the incident light that described cavity receives is directed away from this reflective groove 7 and towards this photodiode 3 by described reflective groove 7.Described reflective groove 7 is coated with metal material layer, oxide skin(coating) or reflection horizon (not shown), effectively incident light can be guided to photodiode 3 further.
Described optical attenuation unit 6 is arranged on pedestal along the second optical axis, and position is relative with photodiode 3.
Shown in figure 1 and Fig. 2, the process of the light transmitting-receiving subassembly output beam of the present embodiment is as follows:
Laser instrument 2 exports outgoing beam λ 1 and is divided into the first outgoing beam λ 2 and the second outgoing beam λ 3 through wavelength division multiplexer 5, it should be noted that, outgoing beam λ 1, first outgoing beam λ 2, second outgoing beam λ 3 and receiving beam λ 4, the first receiving beam λ 5 hereinafter mentioned and the second receiving beam λ 6 military affairs have the light beam of certain diffusion angle, in order to high-visible, the light beam shown in Fig. 2 and Fig. 3 all replaces with the main shaft of every light beams.First outgoing beam λ 2 is when through wavelength division multiplexer 5, because the one side of wavelength division multiplexer 5 relative laser device 2 is convex surfaces 51, particularly also be provided with convex surface part 52 at the axis of the symcenter axle of this wavelength division multiplexer 5, even if the therefore reflection ray launched of this convex surface 51 and convex surface part 52, also be outwards disperse, substantially reduce the probability entering laser instrument 2, and accordingly, the one side of the relative wavelength division multiplexer 5 of described laser instrument 2 is concave surface 21, described concave surface 21 also has one and is positioned at concave part 22 near its central axis, when design concave surface 21 and concave part 22, its surface indentation is in laser instrument 2 transmitting terminal plane, therefore, light is not easy to return and enters this laser instrument 2, can stop by laser instrument 2 transmitting terminal edge, therefore, further reduce the probability that reflection ray enters laser instrument 2.First outgoing beam λ 2 arrives optical fiber 4 and is transmitted by optical fiber 4, thus realizes the light output function of light transmitting-receiving subassembly.Second outgoing beam λ 3 arrives optical attenuation unit 6, and is absorbed by optical attenuation unit 6 the second outgoing beam λ 3 and/or decay, thus weakens the intensity of the second outgoing beam λ 3, therefore reduces the crosstalk of the second outgoing beam λ 3 pairs of photodiodes 3.
Shown in figure 1 and Fig. 3, the process of the light transmitting-receiving subassembly receiving beam of the present embodiment is as follows:
Optical fiber 4 exports receiving beam λ 4 along the direction contrary with the transmission direction of the first outgoing beam λ 1, receiving beam λ 4 is divided into the first receiving beam λ 5 and the second receiving beam λ 6, first receiving beam λ 5 arrive photodiode 3 and detected by photodiode 3 through wavelength division multiplexer 5.The transmission direction of the second receiving beam λ 6 is contrary with the transmission direction of outgoing beam λ, and the second receiving beam λ 6 points to laser instrument 2.Owing to being formed with reflective groove 7 in described inside cavity around the region of described photodiode 3, described reflective groove is arranged around the region around the second port in inside cavity.The second receiving beam λ 6 that described cavity receives by described reflective groove 7 is directed away from this reflective groove 7 and towards this photodiode 3.Described reflective groove 7 is coated with metal material layer, oxide skin(coating) or reflection horizon (not shown), effectively the second receiving beam λ 6 can be guided to photodiode 3 further.Thus play reception well.
Although specifically show in conjunction with preferred embodiment and describe the utility model; but those skilled in the art should be understood that; not departing from the spirit and scope of the present utility model that appended claims limits; can make a variety of changes the utility model in the form and details, be protection domain of the present utility model.
Claims (9)
1. a light transmitting-receiving subassembly, it is characterized in that: comprise pedestal, Optical Transmit Unit, light receiving unit, optical transmission unit and spectrophotometric unit, described base interior offers cavity, described Optical Transmit Unit is arranged on the first port of pedestal along primary optic axis, described light receiving unit is arranged on the second port of pedestal along the second optical axis, described primary optic axis and the second optical axis perpendicular, described optical transmission unit is arranged on the 3rd port of pedestal along primary optic axis, described spectrophotometric unit to be arranged in cavity and to be positioned at the infall of described primary optic axis and the second optical axis, the one side of described spectrophotometric unit relative light emission unit is a convex surface, the one side of the relative spectrophotometric unit of described Optical Transmit Unit is a concave surface, described inside cavity is formed with reflective groove around the region of described light receiving unit, the incident light that described cavity receives is directed away from this reflective groove and towards this light receiving unit by described reflective groove.
2. a kind of light transmitting-receiving subassembly according to claim 1, is characterized in that: described reflective groove is coated with metal material layer, oxide skin(coating) or reflection horizon, effectively incident light can be guided to receiving element further.
3. a kind of light transmitting-receiving subassembly according to claim 1, is characterized in that: described reflective groove is arranged around the region around the second port in inside cavity.
4. a kind of light transmitting-receiving subassembly according to claim 1, is characterized in that: described spectrophotometric unit is wavelength division multiplexer, the angle of described wavelength division multiplexer and primary optic axis is 45° angle.
5. a kind of light transmitting-receiving subassembly according to claim 4, it is characterized in that: described Optical Transmit Unit is laser instrument, described light receiving unit is photodiode.
6. a kind of light transmitting-receiving subassembly according to claim 5, is characterized in that: described laser instrument is directly coupled with wavelength division multiplexer.
7. a kind of light transmitting-receiving subassembly according to claim 1, is characterized in that: described convex surface also has one and is positioned at convex surface part near its central axis.
8. a kind of light transmitting-receiving subassembly according to claim 1, is characterized in that: described concave surface also has one and is positioned at concave part near its central axis.
9. a kind of light transmitting-receiving subassembly according to claim 1, it is characterized in that: also comprise optical attenuation unit, described optical attenuation unit is arranged on pedestal along the second optical axis, and position is relative with light receiving unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420614110.2U CN204086607U (en) | 2014-10-23 | 2014-10-23 | A kind of light transmitting-receiving subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420614110.2U CN204086607U (en) | 2014-10-23 | 2014-10-23 | A kind of light transmitting-receiving subassembly |
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| Publication Number | Publication Date |
|---|---|
| CN204086607U true CN204086607U (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420614110.2U Expired - Fee Related CN204086607U (en) | 2014-10-23 | 2014-10-23 | A kind of light transmitting-receiving subassembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895411A (en) * | 2022-06-13 | 2022-08-12 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2014
- 2014-10-23 CN CN201420614110.2U patent/CN204086607U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114895411A (en) * | 2022-06-13 | 2022-08-12 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160629 Address after: 528400, one of the first floor, No. 38, Yongfeng street, East Village, Zhongshan City, Guangdong Province Patentee after: Zhongshan speed photoelectric technology Co., Ltd. Address before: 365400 Ninghua County, Sanming City Province, the town of the town of Jiang Ming Road, No. 58, No. Patentee before: Ma Qiuping |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20181023 |