CN203838375U - Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system - Google Patents
Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system Download PDFInfo
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- CN203838375U CN203838375U CN201420177313.XU CN201420177313U CN203838375U CN 203838375 U CN203838375 U CN 203838375U CN 201420177313 U CN201420177313 U CN 201420177313U CN 203838375 U CN203838375 U CN 203838375U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 102
- 239000000835 fiber Substances 0.000 title claims abstract description 68
- 230000005540 biological transmission Effects 0.000 title claims abstract description 64
- 230000003287 optical effect Effects 0.000 claims abstract description 71
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
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- 230000008054 signal transmission Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000005622 photoelectricity Effects 0.000 description 1
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Abstract
The utility model discloses a single-fiber passive single-mode and multi-mode transmission converter, which comprises an optical fiber mode converter and a circulator, wherein the optical fiber mode converter is a passive optical device, the optical fiber mode converter is provided with a single-mode end and a multi-mode end, the circulator is a passive optical device and provided with a receiving end, a transmitting end and a common end, the single-mode end of the optical fiber mode converter is connected with the transmitting end of the circulator, the multi-mode end of the optical fiber mode converter is connected with a multi-mode optical transceiver, the receiving end of the circulator is connected with the multi-mode optical transceiver, and the common end of the circulator is connected with a common end of a circulator of another single-fiber passive single-mode and multi-mode transmission converter. Optical signal transmission between the two multi-mode optical transceivers or between a single-mode optical transceiver and the multi-mode optical transceiver can be realized by using the single-fire passive single-mode and multi-mode transmission converter. The device disclosed by the utility model is simple in structure and low in cost, and can realize optical signal transmission between a multi-mode optical fiber system and a single-mode optical fiber system without active equipment conversion.
Description
Technical field
The utility model relates to by the Optical Fiber Transmission converter of passive single multimode conversion and simple optical fiber transmission, is specifically related to passive single multimode conversion and the transmission of single fiber signal between multimode-multimode device and single mode-multimode device.
Background technology
Along with the development of optical fiber communication, the application of optical fiber telecommunications system is also more and more.Distinguish by pattern, these systems are mainly divided multimode and single mode two classes.At present, tend to run into this situation, what in community or building, adopt is multimode optical fiber and multimode optical transmit-receive device, and external communication network adopt be single-mode fiber and single-mode optics transceiver because single-mode fiber can not directly dock with multimode optical fiber, the contact between the two must be changed, general way is to adopt O.E.O (photoelectricity light) converter to change now, O.E.O is active equipment, and it can convert single mode signal to multimode signal, and vice versa.For save cost, simplification system, a kind of need not active conversion and to go to realize single multimode system docking with passive conversion be a kind of demand of optical communication.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of single fiber passive single multimode transmission converter, the passive docking and the single fiber transmission of two-way signaling of realizing single-mode system and multimode system.
For addressing the above problem, the technical scheme that the utility model adopts is as follows:
Technical scheme one:
The passive single multimode transmission converter of single fiber, it is characterized in that, comprise: optical fibre mode converter and circulator, described optical fibre mode converter is Passive Optical Components, optical fibre mode converter has single mode end and multimode end, circulator is Passive Optical Components and has receiving end, transmitting terminal and common port, and the single mode end of optical fibre mode converter is connected with the transmitting terminal of circulator;
The multimode end of optical fibre mode converter, for inputting the multimode signal of multimode light receiving unit;
Optical fibre mode converter, for being converted to multimode signal single mode signal or single mode signal being converted to multimode signal;
The single mode end of optical fibre mode converter, for exporting the single mode signal after optical fibre mode converter conversion to the transmitting terminal of circulator;
The transmitting terminal of circulator, for being sent to the single mode signal receiving the common port of circulator;
The common port of circulator, the single mode signal transmitting for single mode signal being transferred to the common port of another circulator and the common port of another circulator of reception;
The receiving end of circulator, also transfers to optical transmit-receive device by this single mode signal for the received single mode signal of common port that receives circulator.
The common port of described circulator uses APC connector as optical fiber connector, and the common port of circulator and the common port of another circulator are connected by single single-mode fiber.
Technical scheme two:
Fibre-optic transmission system (FOTS), comprise two passive single multimode transmission converters of the single fiber as described in technical scheme one, two passive single multimode transmission converters of single fiber are designated as respectively the passive single multimode transmission converter of the first single fiber and the passive single multimode transmission converter of the second single fiber, optical fibre mode converter and circulator in the passive single multimode transmission converter of the first single fiber are designated as the first optical fibre mode converter and the first circulator, optical fibre mode converter and circulator in the passive single multimode transmission converter of the second single fiber are designated as the second optical fibre mode converter and the second circulator, described fibre-optic transmission system (FOTS) also comprises the first multimode optical transmit-receive device and the second multimode optical transmit-receive device,
The multimode end of described the first optical fibre mode converter is connected with the transmitting terminal of the first multimode optical transmit-receive device, the single mode end of the first optical fibre mode converter is connected with the transmitting terminal of the first circulator, the multimode end of described the second optical fibre mode converter is connected with the transmitting terminal of the second multimode optical transmit-receive device, and the single mode end of the second optical fibre mode converter is connected with the transmitting terminal of the second circulator;
The common port of described the first circulator is connected with the common port of the second circulator, and the receiving end of described the first circulator is connected with the receiving end of the first multimode optical transmit-receive device, and the receiving end of described the second circulator is connected with the receiving end of the second multimode optical transmit-receive device; The signal of the transmitting terminal of described the first circulator of process is sent to the common port of the second circulator from the common port of the first circulator, the signal receiving from the common port of the second circulator is sent to the second multimode optical transmit-receive device through the receiving end of the second circulator.
Between the multimode end of the transmitting terminal of described the first multimode optical transmit-receive device and the first optical fibre mode converter and between the transmitting terminal of the second multimode optical transmit-receive device and the multimode end of the second optical fibre mode converter, be all connected by multimode optical fiber;
Between the receiving end of the receiving end of described the first multimode optical transmit-receive device and the first circulator, between the receiving end of the second multimode optical transmit-receive device and the receiving end of the second circulator, between the single mode end of the first optical fibre mode converter and the transmitting terminal of the first circulator, between the single mode end of the second optical fibre mode converter and the transmitting terminal of the second circulator, be all connected by single-mode fiber between the common port of the first circulator and the common port of the second circulator.
Technical scheme three:
Fibre-optic transmission system (FOTS), comprise a passive single multimode transmission converter of the single fiber as described in technical scheme one, circulator in the passive single multimode transmission converter of described single fiber is designated as the first circulator, and described fibre-optic transmission system (FOTS) also comprises the second circulator, multimode optical transmit-receive device and single-mode optics transceiver;
The multimode end of described optical fibre mode converter is connected with the transmitting terminal of multimode optical transmit-receive device, the single mode end of optical fibre mode converter is connected with the transmitting terminal of the first circulator, the receiving end of the first circulator is connected with the receiving end of multimode optical transmit-receive device, the transmitting terminal of the second circulator is connected with the transmitting terminal of single-mode optics transceiver, the receiving end of the second circulator is connected with the receiving end of single-mode optics transceiver, and the common port of the first circulator is connected with the common port of the second circulator; Be sent to the common port of the second circulator from the common port of the first circulator through the signal of the transmitting terminal of the first circulator, the signal receiving from the common port of the second circulator is sent to the receiving end of single-mode optics transceiver through the receiving end of the second circulator; The signal of the transmitting terminal of described the second circulator of process is sent to the common port of the first circulator from the common port of the second circulator, the signal receiving from the common port of the first circulator is sent to the receiving end of multimode optical transmit-receive device through the receiving end of the first circulator.
Between the multimode end of the transmitting terminal of described multimode optical transmit-receive device and optical fibre mode converter, be connected by multimode optical fiber; Between the single mode end of described optical fibre mode converter and the transmitting terminal of the first circulator, between the receiving end of the first circulator and the receiving end of multimode optical transmit-receive device, between the common port of described the first circulator and the common port of the second circulator, between the transmitting terminal of the second circulator and the transmitting terminal of single-mode optics transceiver and the receiving end of the second circulator be all connected by single-mode fiber with the receiving end of single-mode optics transceiver.
Compared to existing technology, the beneficial effects of the utility model are: use the passive single multimode transmission converter of single fiber of the present utility model can realize the remote fiber-optic signal transmission between two multimode optical transmit-receive devices or between single-mode optics transceiver and multimode optical transmit-receive device, this apparatus structure is simple, cost is low, and the pattern that can realize fiber-optic signal is changed by inactive component and transmits.
Brief description of the drawings
Fig. 1 is the structural representation of the passive single multimode transmission converter of the utility model single fiber.
Fig. 2 is the structural representation of a kind of fibre-optic transmission system (FOTS) of the utility model.
Fig. 3 is the structural representation of the another kind of fibre-optic transmission system (FOTS) of the utility model.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further:
Embodiment mono-:
Fig. 1 shows the embodiment of the passive single multimode transmission converter of single fiber of the present utility model, comprise optical fibre mode converter 1 and circulator 2, optical fibre mode converter 1 is Passive Optical Components, optical fibre mode converter 1 has single mode end and multimode end, circulator 2 is for Passive Optical Components and have receiving end, transmitting terminal and common port, and the single mode end of optical fibre mode converter 1 is connected with the transmitting terminal of circulator 2.
The multimode end of optical fibre mode converter 1, for inputting the multimode signal of multimode light receiving unit; Optical fibre mode converter 1, for being converted to multimode signal single mode signal or single mode signal being converted to multimode signal; The single mode end of optical fibre mode converter 1, for exporting the single mode signal after optical fibre mode converter conversion to the transmitting terminal of circulator; The transmitting terminal of circulator 2, for being sent to the single mode signal receiving the common port of circulator; The common port of circulator 2, the single mode signal transmitting for single mode signal being transferred to the common port of another circulator and the common port of another circulator of reception; The receiving end of circulator 2, also transfers to optical transmit-receive device by this single mode signal for the received single mode signal of common port that receives circulator.
The common port of circulator 2 uses APC connector as optical fiber connector, and the common port of circulator 2 and the common port of another circulator are connected by single single-mode fiber.
Embodiment bis-:
Fig. 2 shows the embodiment of a kind of fibre-optic transmission system (FOTS) of the present utility model, this fibre-optic transmission system (FOTS) comprises two passive single multimode transmission converters of the single fiber as described in embodiment mono-, two passive single multimode transmission converters of single fiber are designated as respectively the passive single multimode transmission converter of the first single fiber and the passive single multimode transmission converter of the second single fiber, optical fibre mode converter and circulator in the passive single multimode transmission converter of the first single fiber are designated as the first optical fibre mode converter 102 and the first circulator 103, optical fibre mode converter and circulator in the passive single multimode transmission converter of the second single fiber are designated as the second optical fibre mode converter 104 and the second circulator 105, the first circulator 103 and the second circulator 104 are three-port circulator, this fibre-optic transmission system (FOTS) also comprises the first multimode optical transmit-receive device 101 and the second multimode optical transmit-receive device 106.
The multimode end of the first optical fibre mode converter 102 is connected with the transmitting terminal of the first multimode optical transmit-receive device 101 by multimode optical fiber, the single mode end of the first optical fibre mode converter 102 is connected with the transmitting terminal of the first circulator 103 by single-mode fiber, and the receiving end of the first circulator 103 is connected with the receiving end of the first multimode optical transmit-receive device 101 by single-mode fiber.
The multimode end of the second optical fibre mode converter 105 is connected with the transmitting terminal of the second multimode optical transmit-receive device 106 by multimode optical fiber, the single mode end of the second optical fibre mode converter 105 is connected with the transmitting terminal of the second circulator 104 by single-mode fiber, and the receiving end of the second circulator 104 is connected with the receiving end of the second multimode optical transmit-receive device 106 by single-mode fiber.
The common port of the first circulator 103 is connected with the common port of the second circulator 104 by single-mode fiber, and this common port all uses APC connector as optical fiber connector, can effectively reduce catoptrical level.
The operation wavelength of this fibre-optic transmission system (FOTS) is 1310nm.
The specific works mode of this fibre-optic transmission system (FOTS) is: the first multimode optical transmit-receive device 101 is sent to multimode optical fiber signal by transmitting terminal the multimode end of the first optical fibre mode converter 102, after being converted to single-mode fiber signal by the first optical fibre mode converter 102, multimode optical fiber signal, by single mode end, single-mode fiber signal is sent to the first circulator 103, the first circulator 103 transfers to single-mode fiber signal by common port the common port of the second circulator 104, the second circulator 104 is sent to single-mode fiber signal by receiving end the receiving end of the second multimode optical transmit-receive device 106, complete a road signal transmission.The fiber-optic signal transmitting to the first multimode optical transmit-receive device 101 from the second multimode optical transmit-receive device 106 and above-mentioned working method in like manner, repeat no more.
Embodiment tri-:
Fig. 3 shows the embodiment of another fibre-optic transmission system (FOTS) of the present utility model, this fibre-optic transmission system (FOTS) comprises a passive single multimode transmission converter of the single fiber as described in embodiment mono-, optical fibre mode converter and circulator in the passive single multimode transmission converter of this single fiber are designated as optical fibre mode converter 202 and the first circulator 203, this fibre-optic transmission system (FOTS) also comprises that the second circulator 204, multimode optical transmit-receive device 201 and single-mode optics transceiver 205, the first circulators 203 and the second circulator 204 are three-port circulator.
The multimode end of optical fibre mode converter 202 is connected with the transmitting terminal of multimode optical transmit-receive device 201 by multimode optical fiber, the single mode end of optical fibre mode converter 202 is connected with the transmitting terminal of the first circulator 203 by single-mode fiber, and the receiving end of the first circulator 203 is connected with the receiving end of multimode optical transmit-receive device 201 by single-mode fiber.
The transmitting terminal of the second circulator 204 is connected with the transmitting terminal of single-mode optics transceiver 205 by single-mode fiber, the receiving end of the second circulator 204 is connected with the receiving end of single-mode optics transceiver 205 by single-mode fiber, and the common port of the first circulator 203 is connected with the common port of the second circulator 204 by single-mode fiber.
The common port of the first circulator 103 is connected with the common port of the second circulator 104 by single-mode fiber, and this common port all uses APC connector as optical fiber connector, can effectively reduce catoptrical level.
The operation wavelength of single mode-multimode device transmission converter is 1310nm.
The specific works mode of single mode-multimode device transmission converter is: multimode optical transmit-receive device 201 is sent to multimode optical fiber signal by transmit port the multimode end of optical fibre mode converter 202, after being converted to single-mode fiber signal by optical fibre mode converter 202, multimode optical fiber signal, by receiving end, single-mode fiber signal is sent to the first circulator 203, the first circulator 203 transfers to single-mode fiber signal by common port the common port of the second circulator 204, and the second circulator 204 transfers to single-mode optics transceiver 205 by receiving end by single-mode fiber signal.Single-mode optics transceiver 205 is sent to single-mode fiber signal by transmit port the transmitting terminal of the second circulator 204, the second circulator 204 transfers to single-mode fiber signal by common port the common port of the first circulator 203, and the first circulator 203 is sent to the single-mode fiber signal receiving the receiving end of multimode optical transmit-receive device 201 by receiving end.
To one skilled in the art, can be according to technical scheme described above and design, make other various corresponding changes and deformation, and within these all changes and deformation all should belong to the protection domain of the utility model claim.
Claims (6)
1. the passive single multimode transmission converter of single fiber, it is characterized in that, comprise: optical fibre mode converter and circulator, described optical fibre mode converter is Passive Optical Components, optical fibre mode converter has single mode end and multimode end, circulator is Passive Optical Components and has receiving end, transmitting terminal and common port, and the single mode end of optical fibre mode converter is connected with the transmitting terminal of circulator;
The multimode end of optical fibre mode converter, for inputting the multimode signal of multimode light receiving unit;
Optical fibre mode converter, for being converted to multimode signal single mode signal or single mode signal being converted to multimode signal;
The single mode end of optical fibre mode converter, for exporting the single mode signal after optical fibre mode converter conversion to the transmitting terminal of circulator;
The transmitting terminal of circulator, for being sent to the single mode signal receiving the common port of circulator;
The common port of circulator, the single mode signal transmitting for single mode signal being transferred to the common port of another circulator and the common port of another circulator of reception;
The receiving end of circulator, also transfers to optical transmit-receive device by this single mode signal for the received single mode signal of common port that receives circulator.
2. the passive single multimode transmission converter of single fiber according to claim 1, it is characterized in that, the common port of described circulator uses APC connector as optical fiber connector, and the common port of circulator and the common port of another circulator are connected by single single-mode fiber.
3. fibre-optic transmission system (FOTS), it is characterized in that, comprise two passive single multimode transmission converters of single fiber as claimed in claim 1 or 2, two passive single multimode transmission converters of single fiber are designated as respectively the passive single multimode transmission converter of the first single fiber and the passive single multimode transmission converter of the second single fiber, optical fibre mode converter and circulator in the passive single multimode transmission converter of the first single fiber are designated as the first optical fibre mode converter and the first circulator, optical fibre mode converter and circulator in the passive single multimode transmission converter of the second single fiber are designated as the second optical fibre mode converter and the second circulator, described fibre-optic transmission system (FOTS) also comprises the first multimode optical transmit-receive device and the second multimode optical transmit-receive device,
The multimode end of described the first optical fibre mode converter is connected with the transmitting terminal of the first multimode optical transmit-receive device, the single mode end of the first optical fibre mode converter is connected with the transmitting terminal of the first circulator, the multimode end of described the second optical fibre mode converter is connected with the transmitting terminal of the second multimode optical transmit-receive device, and the single mode end of the second optical fibre mode converter is connected with the transmitting terminal of the second circulator;
The common port of described the first circulator is connected with the common port of the second circulator, and the receiving end of described the first circulator is connected with the receiving end of the first multimode optical transmit-receive device, and the receiving end of described the second circulator is connected with the receiving end of the second multimode optical transmit-receive device; The signal of the transmitting terminal of described the first circulator of process is sent to the common port of the second circulator from the common port of the first circulator, the signal receiving from the common port of the second circulator is sent to the second multimode optical transmit-receive device through the receiving end of the second circulator.
4. fibre-optic transmission system (FOTS) according to claim 3, it is characterized in that, between the transmitting terminal of described the first multimode optical transmit-receive device and the multimode end of the first optical fibre mode converter and between the transmitting terminal of the second multimode optical transmit-receive device and the multimode end of the second optical fibre mode converter, be all connected by multimode optical fiber;
Between the receiving end of the receiving end of described the first multimode optical transmit-receive device and the first circulator, between the receiving end of the second multimode optical transmit-receive device and the receiving end of the second circulator, between the single mode end of the first optical fibre mode converter and the transmitting terminal of the first circulator, between the single mode end of the second optical fibre mode converter and the transmitting terminal of the second circulator, be all connected by single-mode fiber between the common port of the first circulator and the common port of the second circulator.
5. fibre-optic transmission system (FOTS), it is characterized in that, comprise a passive single multimode transmission converter of single fiber as claimed in claim 1 or 2, circulator in the passive single multimode transmission converter of described single fiber is designated as the first circulator, and described fibre-optic transmission system (FOTS) also comprises the second circulator, multimode optical transmit-receive device and single-mode optics transceiver;
The multimode end of described optical fibre mode converter is connected with the transmitting terminal of multimode optical transmit-receive device, the single mode end of optical fibre mode converter is connected with the transmitting terminal of the first circulator, the receiving end of the first circulator is connected with the receiving end of multimode optical transmit-receive device, the transmitting terminal of the second circulator is connected with the transmitting terminal of single-mode optics transceiver, the receiving end of the second circulator is connected with the receiving end of single-mode optics transceiver, and the common port of the first circulator is connected with the common port of the second circulator; Be sent to the common port of the second circulator from the common port of the first circulator through the signal of the transmitting terminal of the first circulator, the signal receiving from the common port of the second circulator is sent to the receiving end of single-mode optics transceiver through the receiving end of the second circulator; The signal of the transmitting terminal of described the second circulator of process is sent to the common port of the first circulator from the common port of the second circulator, the signal receiving from the common port of the first circulator is sent to the receiving end of multimode optical transmit-receive device through the receiving end of the first circulator.
6. fibre-optic transmission system (FOTS) according to claim 5, is characterized in that, between the multimode end of the transmitting terminal of described multimode optical transmit-receive device and optical fibre mode converter, is connected by multimode optical fiber; Between the single mode end of described optical fibre mode converter and the transmitting terminal of the first circulator, between the receiving end of the first circulator and the receiving end of multimode optical transmit-receive device, between the common port of described the first circulator and the common port of the second circulator, between the transmitting terminal of the second circulator and the transmitting terminal of single-mode optics transceiver and the receiving end of the second circulator be all connected by single-mode fiber with the receiving end of single-mode optics transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177313.XU CN203838375U (en) | 2014-04-11 | 2014-04-11 | Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177313.XU CN203838375U (en) | 2014-04-11 | 2014-04-11 | Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system |
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| CN203838375U true CN203838375U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420177313.XU Expired - Lifetime CN203838375U (en) | 2014-04-11 | 2014-04-11 | Single-fiber passive single-mode and multi-mode transmission converter and optical fiber transmission system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410451A (en) * | 2014-10-20 | 2015-03-11 | 西南交通大学 | Broadband optical fiber transmission method and device in dual-end high-temperature environment |
| CN104320193B (en) * | 2014-10-20 | 2017-04-05 | 西南交通大学 | A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment |
| WO2017118271A1 (en) * | 2016-01-07 | 2017-07-13 | 武汉电信器件有限公司 | Parallel transmission and reception optical module for dual-link transmission, and preparation method |
| CN108155943A (en) * | 2016-12-06 | 2018-06-12 | 北京旋极信息技术股份有限公司 | A kind of optical fiber transmission trunking methods, devices and systems |
| CN110943781A (en) * | 2019-11-27 | 2020-03-31 | 深圳市普威技术有限公司 | Mode conversion equipment for single-mode optical fiber and multimode optical fiber |
| CN113541796A (en) * | 2020-04-21 | 2021-10-22 | 中国移动通信集团广东有限公司 | Optical fiber transmission system and optical fiber circulator |
-
2014
- 2014-04-11 CN CN201420177313.XU patent/CN203838375U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410451A (en) * | 2014-10-20 | 2015-03-11 | 西南交通大学 | Broadband optical fiber transmission method and device in dual-end high-temperature environment |
| CN104320193B (en) * | 2014-10-20 | 2017-04-05 | 西南交通大学 | A kind of asymmetric wideband optical fiber transmission method and device for single-ended hot environment |
| WO2017118271A1 (en) * | 2016-01-07 | 2017-07-13 | 武汉电信器件有限公司 | Parallel transmission and reception optical module for dual-link transmission, and preparation method |
| CN108155943A (en) * | 2016-12-06 | 2018-06-12 | 北京旋极信息技术股份有限公司 | A kind of optical fiber transmission trunking methods, devices and systems |
| CN108155943B (en) * | 2016-12-06 | 2021-01-08 | 北京旋极信息技术股份有限公司 | Optical fiber transmission relay method, device and system |
| CN110943781A (en) * | 2019-11-27 | 2020-03-31 | 深圳市普威技术有限公司 | Mode conversion equipment for single-mode optical fiber and multimode optical fiber |
| CN110943781B (en) * | 2019-11-27 | 2023-05-16 | 深圳市联洲国际技术有限公司 | Mode conversion equipment of single mode optical fiber and multimode optical fiber |
| CN113541796A (en) * | 2020-04-21 | 2021-10-22 | 中国移动通信集团广东有限公司 | Optical fiber transmission system and optical fiber circulator |
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Granted publication date: 20140917 |