CN212163335U - Optical fiber link protection switching system based on optical fiber coding - Google Patents
Optical fiber link protection switching system based on optical fiber coding Download PDFInfo
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- CN212163335U CN212163335U CN202021172122.6U CN202021172122U CN212163335U CN 212163335 U CN212163335 U CN 212163335U CN 202021172122 U CN202021172122 U CN 202021172122U CN 212163335 U CN212163335 U CN 212163335U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 130
- 230000003287 optical effect Effects 0.000 claims abstract description 27
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- 239000000835 fiber Substances 0.000 description 24
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Abstract
An optical fiber link protection switching system based on optical fiber coding, comprising: the optical fiber link comprises a main control module, a light source, a circulator, an optical switch, a first optical fiber link, a second optical fiber link, first equipment and a photoelectric detector, the circulator comprises a first end, a second end and a third end, the light source is connected with the first end of the circulator, the optical switch is connected with the second end of the circulator, the input end of the photoelectric detector is connected with the third end of the circulator, the first optical fiber link is arranged between the optical switch and the first equipment, the second optical fiber link is arranged between the optical switch and the first equipment, the first optical fiber link comprises a first optical fiber reflection code, the second optical fiber link comprises a second optical fiber reflection code, the photoelectric detector, the light source and the optical switch are respectively electrically connected with the main control module, and therefore automatic switching of the optical fiber links is achieved, unique identification, diagnosis and automatic switching of the optical fiber links can be achieved.
Description
Technical Field
The utility model belongs to the technical field of the optic fibre and specifically relates to an optic fibre link protection switched systems based on optic fibre coding.
Background
At present, the existing optical fiber link protection switching system can only judge by means of light emission of equipment on two sides, and cannot uniquely identify an optical fiber link.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, an object of the present invention is to provide an optical fiber link protection switching system based on optical fiber coding, which can realize unique identification, diagnosis and automatic switching of the optical fiber link.
The utility model provides a technical scheme that its problem adopted is:
the embodiment of the application provides master control module, light source, circulator, photoswitch, first fiber link, second fiber link, first equipment and photoelectric detector, the circulator includes first end, second end and third end, the light source with the first end of circulator is connected, the photoswitch with the second end of circulator is connected, photoelectric detector's input with the third end of circulator is connected, first fiber link sets up photoswitch with between the first equipment, second fiber link sets up photoswitch with between the first equipment, first fiber link includes first optic fibre reflection code, second fiber link includes second optic fibre reflection code, photoelectric detector light source and photoswitch respectively with the master control module electricity is connected.
The technical scheme of the application has at least one of the following advantages or beneficial effects: an optical switch and two optical fiber links are arranged between the first equipment and the circulator, and under normal conditions, the first equipment carries out information transmission through the first optical fiber link, namely, the main control module controls the optical switch to open the first optical fiber link and close the second optical fiber link; meanwhile, the main control module can control the light source to be turned on and off, the light wave is sent to identify and diagnose the first optical fiber reflection code in the first optical fiber link, the quality of the operation quality of the optical fiber link is diagnosed according to the change of the energy value of the first optical fiber reflection code in the first optical fiber link, and when the photoelectric detector detects that the contrast attenuation value of the first optical fiber link is greater than a first threshold value, the main control module can control the optical switch to turn off the first optical fiber link and turn on the second optical fiber link, so that the automatic switching of the optical fiber links is realized, and the unique identification, the diagnosis and the automatic switching of the optical fiber links can be realized.
Further, the calculation formula of the reflection parameter of the first optical fiber reflection code and the reflection parameter of the second optical fiber reflection code is as follows:
r＝1÷(10^(D×L÷10))；
r is a reflection parameter, L is a length value of the optical fiber link, and D is an average attenuation value of the optical fiber link.
Further, the first fiber optic reflection code includes at least one first grating and the second fiber optic reflection code includes at least one second grating different from the first grating. The first optical fiber reflection code and the second optical fiber reflection code can be distinguished by the difference of the lengths of the first grating and the second grating, so that the unique identification of the optical fiber link is realized.
The first optical fiber reflection code comprises at least two first gratings, the first interval distance of every two first gratings is equal, the first optical fiber reflection code comprises at least two second gratings, the second interval distance of every two second gratings is equal, and the second interval distance is not equal to the first interval distance. The first optical fiber reflection code and the second optical fiber reflection code can be distinguished by different lengths of the first grating and the second grating and different distances of the first interval and the second interval, so that unique identification of the optical fiber link is realized.
Further, the circulator further comprises a communication management device and a wavelength division multiplexer, wherein the wavelength division multiplexer is respectively connected with the second device, the second end of the circulator and the device. The second device can complete communication with the first device through the wavelength division multiplexer.
Further, the light source is a narrow-band light source. The tunable light source can adopt a narrow-band tunable laser, the narrow-band tunable laser can continuously change the output wavelength of the laser within a certain range, and the cost can be reduced by using the narrow-band light source.
Further, the photodetector includes an avalanche photodiode having an amplification function. Since the reflected light may be weak, an avalanche photodiode is used to amplify the signal of the reflected light.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic diagram of an optical fiber link protection switching system based on optical fiber coding according to an embodiment of the present invention;
fig. 2 is a schematic diagram of optical fiber reflection encoding of an optical fiber link protection switching system based on optical fiber encoding according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an optical fiber link protection switching system based on optical fiber coding according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that although functional block divisions are provided in the system drawings and logical orders are shown in the flowcharts, in some cases, the steps shown and described may be performed in different orders than the block divisions in the systems or in the flowcharts. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
At present, the existing optical fiber link protection switching system can only judge by means of light emission of equipment on two sides, and cannot uniquely identify an optical fiber link.
Based on this, the application provides an optical fiber link protection switching system based on optical fiber coding, including host system, the light source, the circulator, the photoswitch, first optical fiber link, the second optical fiber link, first equipment and photoelectric detector, the circulator includes first end, second end and third end, the light source is connected with the first end of circulator, photoswitch is connected with the second end of circulator, photoelectric detector's input and the third end of circulator are connected, first optical fiber link sets up between photoswitch and first equipment, the second optical fiber link sets up between photoswitch and first equipment, first optical fiber link includes first optical fiber reflection coding, the second optical fiber link includes second optical fiber reflection coding, photoelectric detector, light source and optical switch are connected with host system electricity respectively. Under normal conditions, the first device transmits information through the first optical fiber link, namely the main control module controls the optical switch to open the first optical fiber link and close the second optical fiber link; meanwhile, the main control module can control the light source to be turned on and off, the light wave is sent to identify and diagnose the first optical fiber reflection code in the first optical fiber link, the quality of the operation quality of the optical fiber link is diagnosed according to the change of the energy value of the first optical fiber reflection code in the first optical fiber link, and when the photoelectric detector detects that the contrast attenuation value of the first optical fiber link is greater than a first threshold value, the main control module can control the optical switch to turn off the first optical fiber link and turn on the second optical fiber link, so that the automatic switching of the optical fiber links is realized, and the unique identification, the diagnosis and the automatic switching of the optical fiber links can be realized.
The embodiments of the present application will be further explained with reference to the drawings.
Referring to fig. 1 to 3, an embodiment of the present application provides an optical fiber link protection switching system based on optical fiber coding, including a main control module 110, a light source 120, a circulator 130, an optical switch 140, a first optical fiber link 170, the optical circulator 130 comprises a first end, a second end and a third end, the light source 120 is connected with the first end of the circulator 130, the optical switch 140 is connected with the second end of the circulator 130, the input end of the photoelectric detector 160 is connected with the third end of the circulator 130, the first optical fiber link 170 is arranged between the optical switch 140 and the first device 150, the second optical fiber link 180 is arranged between the optical switch 140 and the first device 150, the first optical fiber link 170 comprises a first optical fiber reflection code 210, the second optical fiber link 180 comprises a second optical fiber reflection code, and the photoelectric detector 160, the light source 120 and the optical switch 140 are respectively electrically connected with the main control module 110.
In an embodiment, an optical switch 140 is disposed between the first device 150 and the circulator 130, and a first optical fiber link 170 and a second optical fiber link 180 are disposed between the optical switch 140 and the first device 150, and under a normal condition, the first device 150 performs information transmission through the first optical fiber link 170, that is, the main control module 110 controls the optical switch 140 to open the first optical fiber link 170 and close the second optical fiber link 180; meanwhile, the main control module 110 may control the light source 120 to be turned on and off, send the light wave to identify and diagnose the first optical fiber reflection code 210 in the first optical fiber link 170, and diagnose the quality of the optical fiber link operation according to a change in the energy value of the first optical fiber reflection code 210 in the first optical fiber link 170, when the photodetector 160 detects that the contrast attenuation value of the first optical fiber link 170 is greater than the first threshold, the main control module 110 may control the optical switch 140 to close the first optical fiber link 170, and open the second optical fiber link 180, thereby implementing the automatic switching of the optical fiber link, and implementing the unique identification, diagnosis and automatic switching of the optical fiber link.
It should be noted that the first end, the second end and the third end of the circulator 130 in this embodiment are arranged in sequence and the unidirectional passing directions of the three ports are the same; since the overall structure involves multiple optical components, the loss in the fiber should be minimized to ensure the accuracy of the measurement.
In one embodiment, the reflection parameter of the first fiber optic reflection code 210 and the reflection parameter of the second fiber optic reflection code are calculated as follows:
r＝1÷(10^(D×L÷10))；
r is a reflection parameter, L is a length value of the optical fiber link, and D is an average attenuation value of the optical fiber link.
In one embodiment, the first fiber-optic reflection code 210 includes at least one first grating and the second fiber-optic reflection code includes at least one second grating that is different from the first grating. The first fiber reflection code 210 and the second fiber reflection code can be distinguished by the length difference of the first grating and the second grating, so that the unique identification of the fiber link is realized.
In one embodiment, the first fiber-optic reflection code 210 includes at least two first gratings, a first interval of each two first gratings is equal in distance, the first fiber-optic reflection code 210 includes at least two second gratings, a second interval of each two second gratings is equal in distance, and the second interval is not equal to the first interval. The first fiber reflection code 210 and the second fiber reflection code can be distinguished by the different lengths of the first grating and the second grating and the different distances of the first interval and the second interval, thereby realizing the unique identification of the fiber link.
It should be noted that, the separation distance between every two first gratings or every two second gratings may be different, and the embodiment of the present application is not limited.
It should be noted that the first fiber reflection code 210 and the second fiber reflection code may be combined by different gratings to form different reflection codes, and the embodiment of the present application is not limited thereto.
In an embodiment, a second device 320 and a wavelength division multiplexer 310 are further included, the wavelength division multiplexer 310 being connected to the second device 320, the second end of the circulator 130 and the device, respectively. The second device 320 is capable of communicating with the first device 150 via the wavelength division multiplexer 310.
It should be noted that there may be more than one device connected by the wavelength division multiplexer, and the embodiments of the present application are not limited.
In one embodiment, the light source 120 is a narrow band light source 120. The tunable light source 120 may be a narrow-band tunable laser, which may continuously change the output wavelength of the laser within a certain range, and the use of the narrow-band light source 120 may reduce the cost. It should be noted that the light source 120 may also be other lasers, and the embodiment of the present application is not limited only.
In one embodiment, the photodetector 160 comprises an avalanche photodiode having an amplification function. Since the reflected light may be weak, an avalanche photodiode is used to amplify the signal of the reflected light.
Above, only the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.
Claims (7)
1. An optical fiber link protection switching system based on optical fiber coding, comprising: the optical switch is connected with the second end of the circulator, the input end of the photoelectric detector is connected with the third end of the circulator, the first optical fiber link is arranged between the optical switch and the first equipment, the second optical fiber link is arranged between the optical switch and the first equipment, the first optical fiber link comprises a first optical fiber reflection code, the second optical fiber link comprises a second optical fiber reflection code, and the photoelectric detector, the optical source and the optical switch are respectively electrically connected with the main control module.
2. The optical fiber link protection switching system based on optical fiber encoding according to claim 1, wherein the calculation formula of the reflection parameter of the first optical fiber reflection encoding and the reflection parameter of the second optical fiber reflection encoding is as follows:
r＝1÷(10^(D×L÷10))；
r is a reflection parameter, L is a length value of the optical fiber link, and D is an average attenuation value of the optical fiber link.
3. The optical fiber link protection switching system based on optical fiber coding according to claim 1, wherein the first optical fiber reflection code comprises at least one first grating, and the second optical fiber reflection code comprises at least one second grating different from the first grating.
4. The system according to claim 1, wherein the first fiber-optic reflection code includes at least two first gratings, a first interval of each two of the first gratings is equal in distance, the first fiber-optic reflection code includes at least two second gratings, a second interval of each two of the second gratings is equal in distance, and the distance of the second interval is not equal to the distance of the first interval.
5. The optical fiber coding-based optical fiber link protection switching system according to any one of claims 1 to 4, further comprising a second device and a wavelength division multiplexer, wherein the wavelength division multiplexer is respectively connected with the second device, the second end of the circulator and the first device.
6. The optical fiber link protection switching system based on optical fiber coding according to any one of claims 1 to 4, wherein the light source is a narrow-band light source.
7. The optical fiber link protection switching system based on optical fiber coding as claimed in any one of claims 1 to 4, wherein said photodetector comprises an avalanche photodiode with amplification function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021172122.6U CN212163335U (en) | 2020-06-22 | 2020-06-22 | Optical fiber link protection switching system based on optical fiber coding |
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| CN202021172122.6U CN212163335U (en) | 2020-06-22 | 2020-06-22 | Optical fiber link protection switching system based on optical fiber coding |
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