CN203930136U - A kind of single-fiber bidirectional optical transmitting-receiving subassembly - Google Patents
A kind of single-fiber bidirectional optical transmitting-receiving subassembly Download PDFInfo
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- CN203930136U CN203930136U CN201420349196.0U CN201420349196U CN203930136U CN 203930136 U CN203930136 U CN 203930136U CN 201420349196 U CN201420349196 U CN 201420349196U CN 203930136 U CN203930136 U CN 203930136U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 53
- 239000000835 fiber Substances 0.000 title claims abstract description 29
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 23
- 230000010287 polarization Effects 0.000 claims abstract description 107
- 239000013078 crystal Substances 0.000 claims abstract description 24
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 3
- 230000009286 beneficial effect 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
- 238000001914 filtration Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model relates to optical-fibre communications field, a kind of single-fiber bidirectional optical transmitting-receiving subassembly is disclosed, comprise input/output terminal, optical module, receiving end and transmitting terminal, described optical module comprises the polarization spectro element, optically-active unit, polarization splitting prism and the optical coupling unit that arrange according to light path; Described optically-active unit comprises magnetic opticity sheet and 1/2 wave plate, is positioned in the light path of transmitting terminal transmitting.The utility model adopts birefringece crystal, polarization splitting prism and magnetic opticity elements combination, when can obtaining higher coupling efficiency, avoid the interference of adjacent wavelength, solve the difficult problem that light transceiver number cannot effectively separate, realize the single-fiber bidirectional optical transmitting-receiving subassembly of any wavelength interval, and its profile can with existing Snigle compatibility, simple and compact for structure, cost is low.
Description
Technical field
The utility model relates to optical-fibre communications field, relates in particular to a kind of single-fiber bidirectional optical transmitting-receiving subassembly that can be used for adjacent wavelength.
Background technology
Along with the application of fiber optic network is more and more universal, progressively implement, and point-to-point data transmission by project for optical fiber access FTTH (Fiber To The Home) especially all over the world, and the demand for bi-directional single fiber component on market is also increasing.Bi-directional single fiber component is in the market all the light signal of two very wide wavelength of wavelength interval.
The principle of the Snigle assembly of simple structure, as shown in Figure 1, light signal enters optical module by optical fiber by input/output terminal 20, in optical module, the first filter plate 40 is miter angle with light path, there are 90 degree reflections through the first filter plate 40 in light beam, then through the second filter plate 50 filtering, then light beam is received by receiving end 30.The PD photodiode that receiving end 30 adopts is a kind of photo-detector, for opto-electronic conversion, makes light signal be converted into electric signal.Transmitting terminal 10 adopts laser diode, and transmitting terminal 10 light beams enter input/output terminal 20 through the first filter plate 40 transmissions.
The principle of traditional dual wavelength Snigle assembly as shown in Figure 2, other principle and describe same Fig. 1, for increasing signal stabilization, reduce the various interference in transmitting procedure, putting an optoisolator 60(at the front end of transmitting terminal 10 is made up of a magnet ring, two polaroids, a magnetic rotation mating plate), make line-hit can not be reflected back laser diode.
In traditional structure, because the first filter plate 40 must be 45 ° of incidents, realize transmission and the reflection of different wave length, so will meet application requirements, the wavelength that transmits and receives so end just must be enough wide, otherwise will cause transmission peak wavelength signal or reflection wavelength signal effectively to separate.
Summary of the invention
For overcoming the problems referred to above, the utility model proposes a kind of single-fiber bidirectional optical transmitting-receiving subassembly, can be used for the optical signal transceiver of adjacent wavelength or single wavelength, and compact conformation, cost are low.
For achieving the above object, the technical scheme that the utility model proposes is: a kind of single-fiber bidirectional optical transmitting-receiving subassembly, comprise input/output terminal, optical module, receiving end and transmitting terminal, described optical module comprises the polarization spectro element, optically-active unit, polarization splitting prism and the optical coupling unit that arrange according to light path; Described optically-active unit comprises magnetic opticity sheet and 1/2 wave plate, is positioned in the light path of transmitting terminal transmitting; The linearly polarized light that transmitting terminal sends is directly transmitted through polarization splitting prism, and behind optically-active unit, its polarization state remains unchanged, and is exported by input/output terminal after polarization spectro element; The flashlight of being inputted by input/output terminal is divided into parallel direction linearly polarized light and vertical direction linearly polarized light through polarization spectro list, wherein a road is directly incident on polarization splitting prism, vertical output after polarization splitting prism reflection, another road is its polarization direction half-twist after optically-active unit, reenter and be mapped on polarization splitting prism, be polarized the rear vertical output of Amici prism reflection; Or the linearly polarized light that transmitting terminal sends incides optically-active unit after polarization splitting prism reflection, behind optically-active unit, its polarization state remains unchanged, and is exported by input/output terminal after polarization spectro element; And the flashlight of input/output terminal input is divided into parallel direction linearly polarized light and vertical direction linearly polarized light through polarization spectro unit, wherein a road is directly incident on polarization splitting prism, and transmitted through exporting after polarization splitting prism, another road is its polarization direction half-twist after optically-active unit, reenter and be mapped on polarization splitting prism, and transmitted through exporting after polarization splitting prism; The identical directional light of two-way polarization state through polarization splitting prism output is coupled on receiving end through optical coupling unit.
Further, described polarization spectro unit is a birefringece crystal, or the combination of a polarization splitting prism and fully reflecting surface.
Further, described optical coupling unit is a convergent lens, or the combination of a birefringece crystal and one 1/2 wave plates.
Further, described receiving end is a photodetector; Described transmitting terminal is a laser diode.
Further, between described transmitting terminal and polarization splitting prism, be provided with an optoisolator.
Further, between described receiving end and optical coupling unit, be provided with an optical filter.
The beneficial effects of the utility model: the utility model adopts birefringece crystal, polarization splitting prism and magnetic opticity elements combination, when can obtaining higher coupling efficiency, avoid the interference of adjacent wavelength, solve the difficult problem that light transceiver number cannot effectively separate, realize the single-fiber bidirectional optical transmitting-receiving subassembly of any wavelength interval, and its profile can with existing Snigle compatibility, simple and compact for structure, cost is low.
Brief description of the drawings
Fig. 1 is single fiber bi-directional dual wavelength light transmitting-receiving subassembly principle schematic;
Fig. 2 is traditional single fiber bi-directional dual wavelength light transmitting-receiving subassembly structural representation;
Fig. 3 is the utility model single-fiber bidirectional optical transmitting-receiving subassembly embodiment mono-structural representation;
Fig. 4 is the utility model single-fiber bidirectional optical transmitting-receiving subassembly embodiment bis-structural representations;
Fig. 5 is the utility model single-fiber bidirectional optical transmitting-receiving subassembly embodiment tri-structural representations;
Fig. 6 is the utility model single-fiber bidirectional optical transmitting-receiving subassembly embodiment tetra-structural representations;
Fig. 7 is the utility model single-fiber bidirectional optical transmitting-receiving subassembly embodiment five structural representations.
Reference numeral: 10, transmitting terminal; 20, input/output terminal; 30, receiving end; 40, the first filter plate; 50, the second filter plate; 60, optoisolator; 70, optical module; 71, birefringece crystal; 72, polarization splitting prism; 73, convergent lens; 74, optically-active unit; 741, magnetic opticity sheet; 742,1/2 wave plate; 743, magnet ring; 75, the second birefringece crystal; 76, the 2 1/2 wave plate; 77, the second polarization splitting prism; 78, fully reflecting surface.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Single-fiber bidirectional optical transmitting-receiving subassembly of the present utility model, can be used for the optical signal transceiver of adjacent wavelength or single wavelength.By adopting birefringece crystal, polarization splitting prism and magnetic opticity elements combination, when can obtaining higher coupling efficiency, avoid the interference of adjacent wavelength, solve the difficult problem that light transceiver number cannot effectively separate, realize the single-fiber bidirectional optical transmitting-receiving subassembly of any wavelength interval, and its profile can with existing Snigle compatibility, simple and compact for structure, cost is low.Concrete, single-fiber bidirectional optical transmitting-receiving subassembly of the present utility model, comprises input/output terminal, optical module, receiving end and transmitting terminal.Wherein, optical module comprises the polarization spectro element, optically-active unit, polarization splitting prism and the optical coupling unit that arrange according to light path; Optically-active unit comprises magnetic opticity sheet and 1/2 wave plate, is positioned in the light path of transmitting terminal transmitting.
Embodiment mono-as shown in Figure 3, in this embodiment, what polarization spectro unit adopted is a birefringece crystal 71, optical coupling unit is a convergent lens 73,1/2 wave plate 742 of 741 and 22.5 ° of the magnetic opticity sheets of optically-active unit 74 is located in a magnet ring 743 successively, between birefringece crystal 71 and polarization splitting prism 72, in the light path that transmitting terminal 10 is launched.Transmitting terminal 10 is a laser diode, send the linearly polarized light of parallel direction polarization, directly transmitted through polarization splitting prism 72, arrive 1/2 wave plate 742 and the magnetic opticity sheet 741 of 22.5 ° in magnet ring 743, constant through its polarization direction after 1/2 wave plates 742 of 22.5 ° and magnetic opticity sheet 741, be still parallel direction polarization, and exported by input/output terminal 20 after the refraction of birefringece crystal 71.And the flashlight of the random polarization state of being inputted by input/output terminal 20 is divided into parallel direction linearly polarized light and vertical direction linearly polarized light after birefringece crystal 71.Wherein, the linearly polarized light of vertical direction is directly incident on polarization splitting prism 72, vertical output after polarization splitting prism 72 reflections; And the linearly polarized light of parallel direction its polarization direction half-twist after 1/2 wave plate 742 of 741 and 22.5 ° of the magnetic opticity sheets of optically-active unit 74, become the linearly polarized light of vertical direction, reenter and be mapped on polarization splitting prism 72, be polarized the rear vertical output of Amici prism 72 reflection.The identical directional light of two-way polarization state of exporting through polarization splitting prism 72 converges on receiving end 30 through convergent lens 73 couplings, and receiving end 30 is a photodetector, is converted into electric signal output.
The single-fiber bidirectional optical transmitting-receiving subassembly of this structure, the light signal of its transmitting terminal 10 and receiving end 30 can be two kinds of wavelength light signals with certain wavelength interval, and the wavelength interval of two light signals can be adjusted arbitrarily according to the demand of related application, can be two wider light signals of wavelength interval, also can be two light signals of adjacent wavelength, can be even that wavelength interval is zero identical wavelength signals.And adopt birefringece crystal, polarization splitting prism and magnetic opticity elements combination, and transmitting terminal laser diode is played to the effect of isolator, improve the interference free performance of system, strengthen system stability.
Embodiment bis-as shown in Figure 4, different from embodiment mono-is, in this embodiment, the linearly polarized light for vertical direction that transmitting terminal 10 laser diodes send, after inciding polarization splitting prism 72, be polarized Amici prism 72 reflection outputs, arrive 1/2 wave plate 742 and the magnetic opticity sheet 741 of 22.5 ° in magnet ring 743, constant through its polarization direction after 1/2 wave plates 742 of 22.5 ° and magnetic opticity sheet 741, be still vertical direction polarization, and exported by input/output terminal 20 after birefringece crystal 71.And the flashlight of the random polarization state that input/output terminal 20 is inputted is divided into parallel direction linearly polarized light and vertical direction linearly polarized light after birefringece crystal 71.Wherein, the linearly polarized light of parallel direction is directly incident on polarization splitting prism 72, after polarization splitting prism 72 transmissions, exports; And the linearly polarized light of vertical direction its polarization direction half-twist after 1/2 wave plate 742 of 741 and 22.5 ° of the magnetic opticity sheets of optically-active unit 74, become the linearly polarized light of parallel direction, reenter and be mapped on polarization splitting prism 72, after polarization splitting prism 72 transmissions, export.The identical directional light of two-way polarization state of exporting through polarization splitting prism 72 converges on receiving end 30 through convergent lens 73 couplings again, and receiving end 30 is a photodetector, is converted into electric signal output.
Embodiment tri-as shown in Figure 5, different from embodiment mono-, in this embodiment, optical coupling unit is the combination of the 2 1/2 wave plate 76 of 75 and 1 ° of one second birefringece crystals.Its transmitting terminal 10 light paths are identical with embodiment mono-, receiving end 30 light paths are also identical with embodiment mono-before polarization splitting prism 72, the directional light of the two-way vertical direction linear polarization that different is exports through polarization splitting prism 72, wherein a road is directly incident on the second birefringece crystal 75, polarization direction half-twist after the 2 1/2 wave plate 76 that another road is 45 °, after becoming parallel direction linearly polarized light, incide again in the second birefringece crystal 75, the orthogonal linearly polarized light in two-way polarization direction is combined into light beam output through the second birefringece crystal 75, and received by receiving end 30 photodetectors, be converted into electric signal output.
Embodiment tetra-as shown in Figure 6, different from embodiment mono-, in this embodiment, polarization spectro unit is the combination of one second polarization splitting prism 77 and a fully reflecting surface 78, this fully reflecting surface 78 and the oblique 45 ° of settings of light path.The light path of transmitting terminal 10 is identical with embodiment mono-, is still horizontal direction linearly polarized light after optically-active unit 74, directly transmitted through this second polarization splitting prism 77, is exported by input/output terminal 20 afterwards.And the flashlight of the random polarization state that input/output terminal 20 is inputted, after this second polarization splitting prism 77, is divided into parallel direction linearly polarized light and vertical direction linearly polarized light.Wherein the linearly polarized light of horizontal direction polarization is directly transmitted through this second polarization splitting prism 77, incide its polarization direction half-twist after 1/2 wave plate 742 of 741 and 22.5 ° of magnetic opticity sheets of optically-active unit 74, become the linearly polarized light of vertical direction, reenter and be mapped on polarization splitting prism 72, be polarized the rear vertical output of Amici prism 72 reflection; After the linearly polarized light of vertical direction is reflected by this second polarization splitting prism 77, after being reflected by the fully reflecting surface 78 of oblique 45 ° of settings, the direction parallel with another linearly polarized light direction of propagation exported again, then be directly incident on polarization splitting prism 72 vertical output after polarization splitting prism 72 reflections.The identical directional light of two-way polarization state of exporting through polarization splitting prism 72 converges on receiving end 30 photodetectors through convergent lens 73 couplings, is converted into electric signal output.
Embodiment five as shown in Figure 7, different from embodiment tetra-, in this embodiment, optical coupling unit is the combination of the 2 1/2 wave plate 76 of 75 and 1 ° of one second birefringece crystals.Its transmitting terminal 10 light paths are identical with embodiment tetra-, receiving end 30 light paths are also identical with embodiment tetra-before polarization splitting prism 72, the directional light of the two-way vertical direction linear polarization that different is exports through polarization splitting prism 72, wherein a road is directly incident on the second birefringece crystal 77, polarization direction half-twist after the 2 1/2 wave plate 78 that another road is 45 °, after becoming parallel direction linearly polarized light, incide again in the second birefringece crystal 77, the orthogonal linearly polarized light in two-way polarization direction is combined into light beam output through the second birefringece crystal 77, and received by receiving end 30 photodetectors, be converted into electric signal output.
In the various embodiments described above, an optoisolator also can be set between transmitting terminal and polarization splitting prism.One optical filter also can be set between receiving end and optical coupling unit.Further to improve anti-interference and the stability of system.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; 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; the various variations of in the form and details the utility model being made, are protection domain of the present utility model.
Claims (6)
1. a single-fiber bidirectional optical transmitting-receiving subassembly, comprises input/output terminal, optical module, receiving end and transmitting terminal, it is characterized in that: described optical module comprises the polarization spectro element, optically-active unit, polarization splitting prism and the optical coupling unit that arrange according to light path; Described optically-active unit comprises magnetic opticity sheet and 1/2 wave plate, is positioned in the light path of transmitting terminal transmitting; The linearly polarized light that transmitting terminal sends is directly transmitted through polarization splitting prism, and behind optically-active unit, its polarization state remains unchanged, and is exported by input/output terminal after polarization spectro element; The flashlight of being inputted by input/output terminal is divided into parallel direction linearly polarized light and vertical direction linearly polarized light through polarization spectro list, wherein a road is directly incident on polarization splitting prism, vertical output after polarization splitting prism reflection, another road is its polarization direction half-twist after optically-active unit, reenter and be mapped on polarization splitting prism, be polarized the rear vertical output of Amici prism reflection; Or the linearly polarized light that transmitting terminal sends incides optically-active unit after polarization splitting prism reflection, behind optically-active unit, its polarization state remains unchanged, and is exported by input/output terminal after polarization spectro element; And the flashlight of input/output terminal input is divided into parallel direction linearly polarized light and vertical direction linearly polarized light through polarization spectro unit, wherein a road is directly incident on polarization splitting prism, and transmitted through exporting after polarization splitting prism, another road is its polarization direction half-twist after optically-active unit, reenter and be mapped on polarization splitting prism, and transmitted through exporting after polarization splitting prism; The identical directional light of two-way polarization state through polarization splitting prism output is coupled on receiving end through optical coupling unit.
2. single-fiber bidirectional optical transmitting-receiving subassembly as claimed in claim 1, is characterized in that: described polarization spectro unit is a birefringece crystal, or the combination of a polarization splitting prism and fully reflecting surface.
3. single-fiber bidirectional optical transmitting-receiving subassembly as claimed in claim 1, is characterized in that: described optical coupling unit is a convergent lens, or the combination of a birefringece crystal and one 1/2 wave plates.
4. single-fiber bidirectional optical transmitting-receiving subassembly as described in claim 1-3 any one, is characterized in that: described receiving end is a photodetector; Described transmitting terminal is a laser diode.
5. single-fiber bidirectional optical transmitting-receiving subassembly as described in claim 1-3 any one, is characterized in that: between described transmitting terminal and polarization splitting prism, be provided with an optoisolator.
6. single-fiber bidirectional optical transmitting-receiving subassembly as described in claim 1-3 any one, is characterized in that: between described receiving end and optical coupling unit, be provided with an optical filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420349196.0U CN203930136U (en) | 2014-06-27 | 2014-06-27 | A kind of single-fiber bidirectional optical transmitting-receiving subassembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420349196.0U CN203930136U (en) | 2014-06-27 | 2014-06-27 | A kind of single-fiber bidirectional optical transmitting-receiving subassembly |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133273A (en) * | 2014-06-27 | 2014-11-05 | 厦门市贝莱光电技术有限公司 | Single-fiber bidirectional optical transceiving assembly |
| CN105372769A (en) * | 2015-11-30 | 2016-03-02 | 武汉电信器件有限公司 | Assembly of transmitting and receiving AOC (Active Optical Cable) through single wavelength |
| CN105515659A (en) * | 2015-12-01 | 2016-04-20 | 浙江工业大学 | Channel control device and method of duplex visible light communication system |
| CN109100838A (en) * | 2018-09-03 | 2018-12-28 | 武汉电信器件有限公司 | A kind of integral single fibre bilateral device of controllable temperature |
| CN115513754A (en) * | 2022-09-22 | 2022-12-23 | 杭州奥创光子技术有限公司 | Isolator and laser |
-
2014
- 2014-06-27 CN CN201420349196.0U patent/CN203930136U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133273A (en) * | 2014-06-27 | 2014-11-05 | 厦门市贝莱光电技术有限公司 | Single-fiber bidirectional optical transceiving assembly |
| CN105372769A (en) * | 2015-11-30 | 2016-03-02 | 武汉电信器件有限公司 | Assembly of transmitting and receiving AOC (Active Optical Cable) through single wavelength |
| CN105372769B (en) * | 2015-11-30 | 2017-07-18 | 武汉电信器件有限公司 | A kind of Single wavelength receives and dispatches AOC components |
| CN105515659A (en) * | 2015-12-01 | 2016-04-20 | 浙江工业大学 | Channel control device and method of duplex visible light communication system |
| CN109100838A (en) * | 2018-09-03 | 2018-12-28 | 武汉电信器件有限公司 | A kind of integral single fibre bilateral device of controllable temperature |
| CN109100838B (en) * | 2018-09-03 | 2021-02-26 | 武汉电信器件有限公司 | Integrated single-fiber bidirectional device with controllable temperature |
| CN115513754A (en) * | 2022-09-22 | 2022-12-23 | 杭州奥创光子技术有限公司 | Isolator and laser |
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Effective date of registration: 20200506 Address after: 361000 one of the 5th floor, No. 8059, Xiang'an West Road, industrial zone, torch high tech Zone (Xiang'an), Xiamen City, Fujian Province Patentee after: Xiamen beilai Information Technology Co.,Ltd. Address before: 5, building 8059, No. 361000 West Xiangan Road, Xiamen torch hi tech Zone (Xiangan), Xiangan District, Xiamen, Fujian Patentee before: XIAMEN BEILAI OPTOELECTRONIC TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20141105 |
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