CN116667933A - Bidirectional optical amplifying device - Google Patents
Bidirectional optical amplifying device Download PDFInfo
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- CN116667933A CN116667933A CN202210147509.3A CN202210147509A CN116667933A CN 116667933 A CN116667933 A CN 116667933A CN 202210147509 A CN202210147509 A CN 202210147509A CN 116667933 A CN116667933 A CN 116667933A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 397
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims abstract description 54
- 238000004891 communication Methods 0.000 claims abstract description 49
- 239000013307 optical fiber Substances 0.000 claims abstract description 41
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims description 31
- 230000003321 amplification Effects 0.000 claims description 30
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000004927 fusion Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 229910052691 Erbium Inorganic materials 0.000 claims 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/297—Bidirectional amplification
- H04B10/2971—A single amplifier for both directions
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
A bidirectional optical amplifying device comprises an optical fiber amplifier and a first optical isolation module. The optical fiber amplifier is used for amplifying the received optical signal and is provided with a first transmission end used for receiving the first optical signal and a second transmission end used for receiving the second optical signal, the optical fiber amplifier is used for amplifying the power of the first optical signal to generate an amplified first optical signal and outputting the amplified first optical signal from the second transmission end, the optical fiber amplifier is used for amplifying the power of the second optical signal to generate an amplified second optical signal and outputting the amplified second optical signal from the first transmission end. The first optical isolation module is connected between the first transmission end of the optical fiber amplifier and the first optical communication terminal, and is used for limiting the traveling direction of a first optical signal from the first optical communication terminal to be output to the first transmission end of the optical fiber amplifier and limiting the traveling direction of an amplified second optical signal output from the first transmission end to be output to the first optical communication terminal.
Description
Technical Field
The present invention relates to an optical amplification technology, and more particularly, to a bidirectional optical amplification device for uplink and downlink optical transmission.
Background
Referring to fig. 1, the conventional bidirectional optical communication technology has two wavelength division multiplexers (Wavelength Division Multiplexing, WDM), and two Erbium-doped fiber amplifiers (Erbium-doped Optical Fiber Amplifier, EDFA, hereinafter referred to as optical fiber amplifiers) P1 and P2 are required to amplify power for a downlink (downlink) optical signal and an uplink (uplink) optical signal, respectively, which has the disadvantages of increasing hardware cost due to the high price of the optical fiber amplifiers, and two sets of control units are required to control the two optical fiber amplifiers, thereby increasing design complexity.
Disclosure of Invention
The object of the present invention is to provide a bi-directional optical amplifying device that solves the problems encountered in the prior art.
The invention relates to a bidirectional optical amplification device, which is connected between a first optical communication terminal and a second optical communication terminal, wherein the first optical communication terminal is used for generating a first optical signal, the second optical communication terminal is used for generating a second optical signal, and the wavelength of the first optical signal is different from that of the second optical signal; the method is characterized in that: comprises a fiber amplifier and a first optical isolation module.
The optical fiber amplifier is used for amplifying the received optical signal and is provided with a first transmission end used for receiving the first optical signal and a second transmission end used for receiving the second optical signal, the optical fiber amplifier is used for amplifying the power of the first optical signal to generate an amplified first optical signal, outputting the amplified first optical signal from the second transmission end, and the optical fiber amplifier is used for amplifying the power of the second optical signal to generate an amplified second optical signal, and outputting the amplified second optical signal from the first transmission end.
The first optical isolation module is connected between the first transmission end of the optical fiber amplifier and the first optical communication terminal, and is used for limiting the traveling direction of a first optical signal from the first optical communication terminal to be output to the first transmission end of the optical fiber amplifier and limiting the traveling direction of an amplified second optical signal output from the first transmission end to be output to the first optical communication terminal.
Preferably, the optical fiber amplifier comprises a first optical detector, a second optical detector, an optical power controller, a pump light generator, an optical amplifying module and a gain flattening filter.
The first optical detector is connected with the second transmission end to detect the amplified first optical signal and generate a first electric signal corresponding to a first power value of the amplified first optical signal. The second optical detector is connected with the first transmission end to detect the first optical signal and generate a second electric signal corresponding to a second power value of the first optical signal. The optical power controller is electrically connected with the first optical detector and the second optical detector to respectively receive the first electric signal and the second electric signal, and generates an optical power control signal according to the comparison of the first power value and the second power value with a target power value. The pump light generator is electrically connected with the optical power controller to receive the optical power control signal and generate pump light according to the optical power control signal. The optical amplifying module is used for respectively receiving the first optical signal and the second optical signal, is connected with the pump light generator to receive the pump light, and generates the amplified first optical signal according to the power of the pump light for exciting the first optical signal and generates the amplified second optical signal according to the power of the pump light for exciting the second optical signal.
Preferably, the optical amplifying module includes a first erbium-doped fiber and a second erbium-doped fiber, and the first erbium-doped fiber and the second erbium-doped fiber are used for exciting the power of the first optical signal and the power of the second optical signal according to the pump light.
Preferably, the optical fiber amplifier further includes a first pump coupler, and the first pump coupler is connected between the optical amplifying module and the pump light generator, and is configured to couple the second optical signal with the pump light and output the second optical signal to the first erbium-doped optical fiber.
Preferably, the first pump coupler includes wavelength division multiplexing (Wavelength Division Multiplexing, WDM) elements for coupling 980nm and 1550nm wavelengths.
Preferably, the first photodetector has a first optical splitter and a first photoelectric conversion diode, the first optical splitter is configured to split a part of light from the amplified first optical signal to generate a first detection light, and the first photoelectric conversion diode receives the first detection light and generates the first electrical signal according to the first detection light.
Preferably, the second photodetector has a second beam splitter and a second photo-conversion diode, the second beam splitter is configured to split a portion of the amplified second optical signal to generate a second detection light, and the second photo-conversion diode receives the second detection light and generates the second electrical signal according to the second detection light.
Preferably, the pump light generator comprises an electro-optical conversion diode for electrically converting the optical power control signal to generate the pump light.
Preferably, the first optical isolation module includes a first bidirectional coupler, a second bidirectional coupler, a first optical isolator, and a second optical isolator, where the first bidirectional coupler is connected to the first optical communication terminal, and is configured to transmit the first optical signal to the first optical isolator and transmit the amplified second optical signal to the first optical communication terminal after performing optical wave fusion on the first optical signal and the amplified second optical signal in opposite directions. A first optical isolator is connected between the first bidirectional coupler and the second bidirectional coupler and used for isolating the amplified second optical signal and transmitting the first optical signal to the second bidirectional coupler; the second optical isolator is connected between the first bidirectional coupler and the second bidirectional coupler, and is used for isolating the first optical signal from the first optical communication terminal and transmitting the amplified second optical signal to the first bidirectional coupler. The second bidirectional coupler is connected between the first optical isolator, the second optical isolator and the first transmission end, and is used for transmitting the first optical signal to the first transmission end and transmitting the amplified second optical signal to the second optical isolator after converging the first optical signal and the amplified second optical signal in opposite directions.
Preferably, the bidirectional optical amplifying device further comprises a second optical isolation module. The second optical isolation module is connected between the second transmission end of the optical fiber amplifier and the second optical communication terminal, and is used for limiting the traveling direction of the second optical signal from the second optical communication terminal to be output to the second transmission end of the optical fiber amplifier and limiting the traveling direction of the amplified first optical signal output from the second transmission end to be output to the second optical communication terminal.
Preferably, the bidirectional optical amplifier device further comprises a gain flattening filter, and filters the first optical signal and the second optical signal at the same time, so that the up-and-down amplified signal remains flattened in the spectral range.
The beneficial effects of the invention are that: only one optical fiber amplifier is used for carrying out power amplification on a downlink (downlink) optical signal and an uplink (uplink) optical signal in bidirectional optical communication, so that hardware cost is effectively reduced.
Drawings
FIG. 1 is a block diagram of the prior art;
FIG. 2 is a block diagram of an embodiment of a bi-directional optical amplification apparatus of the present invention;
FIG. 3 is a block diagram of an embodiment;
fig. 4 is a block diagram of an optical power controller of an embodiment.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 2, an embodiment of the bidirectional optical amplifying device of the present invention is configured to connect a first optical communication terminal C1 and a second optical communication terminal C2, where the first optical communication terminal C1 is configured to generate a first optical signal (e.g. red light band, downlink light stream), and the second optical communication terminal C2 is configured to generate a second optical signal (e.g. blue light band, uplink light stream), and the wavelength (1547.72-1563.05 nm) of the first optical signal is different from the wavelength (1528.77-1543.73 nm) of the second optical signal. The bidirectional optical amplifying device comprises an optical fiber amplifier PA, a first optical isolation module IS1 and a second optical isolation module IS2.
The optical fiber amplifier PA is configured to amplify the received optical signal, and has a first transmission end IO1 configured to receive the first optical signal, and a second transmission end IO2 configured to receive the second optical signal, where the optical fiber amplifier PA is configured to amplify the power of the first optical signal to generate an amplified first optical signal, and output the amplified first optical signal from the second transmission end IO2, and the optical fiber amplifier PA is configured to amplify the power of the second optical signal to generate an amplified second optical signal, and output the amplified second optical signal from the first transmission end IO 2.
As shown in fig. 3 and 4, the optical fiber amplifier PA includes a first photodetector 1, a second photodetector 2, a pump light generator 3, an optical power controller 4, an optical amplification module 5, and a first pump coupler 6.
The first optical detector 1 is connected to the second transmission end IO2 to detect the amplified first optical signal, and generates a first electrical signal corresponding to a first power value of the amplified first optical signal. The first photodetector 1 has a first beam splitter 11 and a first photodiode 12, where the first beam splitter 11 is used to split a part of the amplified first optical signal into a first detection light. The first photodiode 12 receives the first detection light and generates a first electrical signal according to the first detection light.
The second optical detector 2 is connected to the first transmission end IO1 to detect the first optical signal and generate a second electrical signal corresponding to a second power value of the amplified second optical signal. The second photodetector 2 has a second beam splitter 21 and a second photodiode 22, wherein the second beam splitter 21 is configured to split a portion of the first optical signal into a second detection light, and the second photodiode 21 receives the second detection light and generates a second electrical signal according to the second detection light.
The optical power controller 4 is electrically connected to the first optical detector 1 and the second optical detector 2 to receive the first electrical signal and the second electrical signal respectively, and generates an optical power control signal according to the first power value (the amplified actual power) and the second power value (the un-amplified power) compared with a target power value.
The pump light generator 3 is electrically connected to the optical power controller 4 to receive the optical power control signal, and generates pump light according to the optical power control signal. The pump light generator 3 includes an electro-optical conversion diode 31, and the electro-optical conversion diode 31 is configured to electrically convert the optical power control signal into light to generate pump light.
The optical amplifying module 5 receives the first optical signal and the second optical signal respectively, is connected with the pump light generator 3 to receive the pump light, and the optical amplifying module 5 generates an amplified first optical signal according to the power of the pump light excited first optical signal, and the optical amplifying module 5 generates the amplified second optical signal according to the power of the pump light excited second optical signal. The optical amplification module 5 includes a first erbium-doped fiber 51, a second erbium-doped fiber 52, wavelength division multiplexers 53 to 54, and a gain flattening filter (Gain Flatness Filter, GFF) 55.
The gain flattening filter 55 is configured to filter the first optical signal and the second optical signal at the same time, so that the up-and-down amplified signal is kept flat in the spectral range, and the gain of each wavelength of the output signal is kept at the same level, and since the up-and-down optical signal actually includes a plurality of wavelengths, the gains of different wavelengths are different, and the gain flattening filter 55 is configured to uniformly attenuate the optical power of each wavelength, so as to keep the gain spectrum flat.
The wavelength division multiplexer 53 and the wavelength division multiplexer 54 are used for summing or dividing 980nm and signal light (including up and down signals), wherein 53 is to say that 980nm of pump light is separated from the signal light, after separation, gain flattening filters filter the signal light flatly (filtering cannot be performed on the pump light), and the wavelength division multiplexer 54 is to drop 980nm of pump light and the filtered signal light are combined together.
The first erbium-doped fiber 51 and the second erbium-doped fiber 52 are used for exciting the power of the first optical signal and the power of the second optical signal according to the pump light and the pump light.
Further described herein, the optical power controller 4 calculates the current actual gain according to the difference between the first power value and the second power value from the two optical detectors 1 and 2, and adjusts the current received by the pump light generator 3 (i.e. the optical power control signal) according to the difference between the actual gain and the target gain, thereby adjusting the pump light generated by the pump light generator 3, and finally, the power of the amplified first optical signal (downlink) is made to reach the target gain, and when the gain of the downlink (downlink) is controlled to reach the target power, the uplink (uplink) is also finally clamped to the same gain, because the same first erbium-doped fiber 51 and second erbium-doped fiber 52 are shared, and the uplink and downlink gains are also made to be the same. The optical flow path of the first optical signal (downlink stream) sequentially passes through the second erbium-doped fiber 52, the wavelength division multiplexer 54, the gain flattening filter 55, the wavelength division multiplexers 53 and 51, and the uplink stream sequentially passes through the first erbium-doped fiber 51, the wavelength division multiplexer 53, the gain flattening filter 55, the wavelength division multiplexer 54 and the second erbium-doped fiber 52.
And the present embodiment is not limited to using two erbium-doped fibers, but can be implemented by using one erbium-doped fiber, and the two erbium-doped fibers are mainly because, in view of gain flattening, a gain flattening filter is added between the two erbium-doped fibers, if the system has no high requirement for gain flattening, only one of the first erbium-doped fiber 51 and the second erbium-doped fiber 52 can be used, that is, only one erbium-doped fiber (EDF) can be used, so that the problem to be solved by the present scheme can be solved, because the erbium-doped fiber itself can be amplified in both directions, the down stream is amplified simultaneously, and because the second optical signal (up stream) and the first optical signal (down stream) are actually the same erbium-doped fiber (EDF) in common, the amplified gain is the same, and when the gain in one direction is controlled to the target value, the other direction is also clamped to the same target value.
The first pump coupler 6 is connected between the optical amplifying module 5 and the pump light generator 3, and is configured to couple the second optical signal and the pump light and output the second optical signal and the pump light to the first erbium-doped fiber 51. The first pump coupler 6 comprises a wavelength division multiplexing (Wavelength Division Multiplexing, WDM) element for coupling 980nm light wavelengths with 1550nm light wavelengths. The 980/1550nm WDM referred to herein is actually a Band width range, such as 980.+ -.10 nm, 1550.+ -.25 nm, that is 1550Port, which allows both the first optical signal and the second optical signal (Red Band wavelength is 1547.72-1563.05 nm, and Blue Band wavelength is 1528.77-1543.73 nm) to pass through.
As shown in fig. 2, the first optical isolation module IS1 IS connected between the first transmission end of the optical fiber amplifier PA and the first optical communication terminal C1, and IS configured to limit the traveling direction of the first optical signal from the first optical communication terminal C1 to be output to the first transmission end IO1 of the optical fiber amplifier PA, and the traveling direction of the amplified second optical signal output from the first transmission end IO1 IS output to the first optical communication terminal C1. Referring to fig. 3, the first optical isolation module IS1 includes a first bi-directional coupler 71, a second bi-directional coupler 72, a first optical isolator 73, a second optical isolator 74,
the first bi-directional coupler 71 is connected to the first optical communication terminal C1, and is configured to transmit the first optical signal to the first optical isolator 73 and transmit the amplified second optical signal to the first optical communication terminal C1 after performing optical wave fusion on the first optical signal in the opposite direction and the amplified second optical signal.
The first optical isolator 73 is connected between the first bi-directional coupler 71 and the second bi-directional coupler 72, and is used for isolating the amplified second optical signal and transmitting the first optical signal to the second bi-directional coupler 72.
The second optical isolator 74 is connected between the first bi-directional coupler 71 and the second bi-directional coupler 72, and is used for isolating the first optical signal from the first optical communication terminal C1 and transmitting the amplified second optical signal to the first bi-directional coupler 71.
The second bidirectional coupler 72 is connected between the first optical isolator 73, the second optical isolator 74 and the first transmission end IO1, and is configured to combine the first optical signal in the opposite direction and the amplified second optical signal, and then transmit the first optical signal to the first transmission end IO1, and transmit the amplified second optical signal to the second optical isolator 74.
As shown in fig. 2, the second optical isolation module IS2 IS connected between the second transmission end IO2 of the optical fiber amplifier PA and the second optical communication terminal C2, and IS configured to limit the traveling direction of the second optical signal from the second optical communication terminal C2 to be output to the second transmission end IO2 of the optical fiber amplifier PA, and limit the traveling direction of the amplified first optical signal output from the second transmission end IO2 to be output to the second optical communication terminal C2.
Referring to fig. 3, the second optical isolation module IS2 includes a third bi-directional coupler 81, a fourth bi-directional coupler 82, a third optical isolator 83, a fourth optical isolator 84,
the third bi-directional coupler 81 is connected to the second optical communication terminal C2, and is configured to transmit the amplified first optical signal to the second optical communication terminal C2 and the second optical signal to the fourth optical isolator 84 after performing optical wave fusion on the amplified first optical signal and the second optical signal in opposite directions.
The third optical isolator 83 is connected between the third bi-directional coupler 81 and the fourth bi-directional coupler 82, and is used for isolating the second optical signal and transmitting the amplified first optical signal to the third bi-directional coupler 81.
The fourth optical isolator 84 is connected between the third bi-directional coupler 81 and the fourth bi-directional coupler 82 for isolating the amplified first optical signal from the fourth bi-directional coupler 82 and transmitting the second optical signal to the fourth bi-directional coupler 82.
The third bidirectional coupler 82 is connected between the third optical isolator 83, the fourth optical isolator 84 and the second transmission end IO2, and is configured to transmit the second optical signal to the second transmission end IO2 after light wave merging of the amplified first optical signal and the second optical signal in opposite directions, and transmit the amplified first optical signal to the third optical isolator 83.
In summary, the above embodiment has the following advantages: only one optical fiber amplifier is used for power amplification of downlink (downlink) optical signals and uplink (uplink) optical signals in bidirectional optical communication, so that hardware cost is effectively reduced, and a set of optical power controller and a pump light generator are also required, so that design complexity is reduced, and the purpose of the invention can be truly achieved.
However, the foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (20)
1. A bidirectional optical amplification device connected between a first optical communication terminal and a second optical communication terminal, wherein the first optical communication terminal is used for generating a first optical signal, the second optical communication terminal is used for generating a second optical signal, and the wavelength of the first optical signal is different from that of the second optical signal; the method is characterized in that: comprises the following steps of;
the optical fiber amplifier is used for amplifying the received optical signal and is provided with a first transmission end used for receiving the first optical signal and a second transmission end used for receiving the second optical signal, the optical fiber amplifier is used for amplifying the power of the first optical signal to generate an amplified first optical signal, outputting the amplified first optical signal from the second transmission end, and the optical fiber amplifier is used for amplifying the power of the second optical signal to generate an amplified second optical signal, and outputting the amplified second optical signal from the first transmission end;
the first optical isolation module is connected between the first transmission end of the optical fiber amplifier and the first optical communication terminal, and is used for limiting the traveling direction of the first optical signal from the first optical communication terminal to be output to the first transmission end of the optical fiber amplifier and limiting the traveling direction of the amplified second optical signal output from the first transmission end to be output to the first optical communication terminal.
2. The bi-directional optical amplification apparatus of claim 1 wherein: the optical fiber amplifier includes:
the first optical detector is connected with the second transmission end to detect the amplified first optical signal and generate a first electric signal corresponding to a first power value of the amplified first optical signal;
the second optical detector is connected with the first transmission end to detect the first optical signal and generate a second electric signal corresponding to a second power value of the first optical signal;
an optical power controller electrically connected to the first and second optical detectors to receive the first and second electrical signals, respectively, and generating an optical power control signal according to the first and second power values compared with a target power value;
the pump light generator is electrically connected with the optical power controller to receive the optical power control signal and generate pump light according to the optical power control signal;
the optical amplifying module is used for respectively receiving the first optical signal and the second optical signal, is connected with the pump light generator to receive the pump light, and generates the amplified first optical signal according to the power of the pump light for exciting the first optical signal and generates the amplified second optical signal according to the power of the pump light for exciting the second optical signal.
3. The bi-directional optical amplification apparatus of claim 2 wherein: the optical amplification module comprises a first erbium doped fiber,
the first erbium-doped fiber is used for exciting the power of the first optical signal and the power of the second optical signal according to the pump light.
4. A bi-directional optical amplifying device according to claim 3 and wherein: the optical fiber amplifier further comprises a first pump coupler, wherein the first pump coupler is connected between the optical amplifying module and the pump light generator and used for coupling the second optical signal with the pump light and outputting the second optical signal to the first erbium-doped optical fiber.
5. The bi-directional optical amplification apparatus of claim 4 wherein: the first pump coupler includes a wavelength division multiplexing element.
6. The bi-directional optical amplification apparatus of claim 5 wherein: the first pump coupler is configured to couple 980nm and 1550nm wavelengths.
7. The bi-directional optical amplification apparatus of claim 2 wherein: the optical amplification module comprises a first erbium-doped fiber and a second erbium-doped fiber,
the first erbium-doped fiber and the second erbium-doped fiber are used for exciting the power of the first optical signal and the power of the second optical signal according to the pump light.
8. The bi-directional optical amplification apparatus of claim 2 wherein: the optical amplification module further includes a gain flattening filter to simultaneously filter the first optical signal and the second optical signal such that the first optical signal and the second optical signal remain flattened over a spectral range.
9. The bi-directional optical amplification apparatus of claim 2 wherein: the first photodetector has a first beam splitter,
the first optical splitter is used for splitting the amplified first optical signal into a part of light to generate first detection light.
10. The bi-directional optical amplification apparatus of claim 9 wherein: the first photodetector further has a first photodiode,
the first photoelectric conversion diode receives the first detection light and generates the first electric signal according to the first detection light.
11. The bi-directional optical amplification apparatus of claim 2 wherein: the second photodetector has a second beam splitter,
the second optical splitter is used for splitting the first optical signal into a part of light to generate second detection light.
12. The bi-directional optical amplification apparatus of claim 11 wherein: the second photodetector further has a second photodiode,
the second photoelectric conversion diode receives the second detection light and generates the second electric signal according to the second detection light.
13. The bi-directional optical amplification apparatus of claim 2 wherein: the pump light generator includes an electro-optical conversion diode for electrically converting the optical power control signal to generate the pump light.
14. The bi-directional optical amplification apparatus of claim 1 wherein: the first optical isolation module comprises a first bidirectional coupler, a second bidirectional coupler, a first optical isolator and a second optical isolator,
the first bidirectional coupler is connected to the first optical communication terminal, and is used for transmitting the first optical signal to the first optical isolator and transmitting the amplified second optical signal to the first optical communication terminal after the first optical signal in the opposite direction and the amplified second optical signal are subjected to optical wave fusion;
the first optical isolator is connected between the first bidirectional coupler and the second bidirectional coupler and used for isolating the amplified second optical signal and transmitting the first optical signal to the second bidirectional coupler;
the second optical isolator is connected between the first bidirectional coupler and the second bidirectional coupler and used for isolating the first optical signal from the first optical communication terminal and transmitting the amplified second optical signal to the first bidirectional coupler;
the second bidirectional coupler is connected between the first optical isolator, the second optical isolator and the first transmission end, and is used for transmitting the first optical signal to the first transmission end and transmitting the amplified second optical signal to the second optical isolator after converging the first optical signal and the amplified second optical signal in opposite directions.
15. The bi-directional optical amplification apparatus of claim 14 wherein: the first bi-directional coupler includes a wavelength division multiplexing element.
16. The bi-directional optical amplification apparatus of claim 14 wherein: the second bi-directional coupler includes a wavelength division multiplexing element.
17. The bi-directional optical amplification apparatus of claim 1 wherein: also comprises;
the second optical isolation module is connected between the second transmission end of the optical fiber amplifier and the second optical communication terminal, and is used for limiting the traveling direction of the second optical signal from the second optical communication terminal to be output to the second transmission end of the optical fiber amplifier and limiting the traveling direction of the amplified first optical signal output from the second transmission end to be output to the second optical communication terminal.
18. The bi-directional optical amplification apparatus of claim 17 wherein: the second optical isolation module comprises a third bidirectional coupler, a fourth bidirectional coupler, a third optical isolator and a fourth optical isolator;
the third bidirectional coupler is connected to the second optical communication terminal, and is configured to transmit the amplified first optical signal to the second optical communication terminal and the second optical signal to the fourth optical isolator after performing optical wave fusion on the amplified first optical signal and the second optical signal in opposite directions,
the third optical isolator is connected between the third bi-directional coupler and the fourth bi-directional coupler and used for isolating the second optical signal and transmitting the amplified first optical signal to the third bi-directional coupler,
the fourth optical isolator is connected between the third bi-directional coupler and the fourth bi-directional coupler for isolating the amplified first optical signal from the fourth bi-directional coupler and transmitting the second optical signal to the fourth bi-directional coupler,
the third bidirectional coupler is connected between the third optical isolator, the fourth optical isolator and the second transmission end, and is used for transmitting the second optical signal to the second transmission end and transmitting the amplified first optical signal to the third optical isolator after the amplified first optical signal and the second optical signal in opposite directions are subjected to optical wave fusion.
19. The bi-directional optical amplification apparatus of claim 18 wherein: the third bi-directional coupler includes a wavelength division multiplexing element.
20. The bi-directional optical amplification apparatus of claim 18 wherein: the fourth bi-directional coupler includes a wavelength division multiplexing element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210147509.3A CN116667933A (en) | 2022-02-17 | 2022-02-17 | Bidirectional optical amplifying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210147509.3A CN116667933A (en) | 2022-02-17 | 2022-02-17 | Bidirectional optical amplifying device |
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| CN116667933A true CN116667933A (en) | 2023-08-29 |
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| CN202210147509.3A Pending CN116667933A (en) | 2022-02-17 | 2022-02-17 | Bidirectional optical amplifying device |
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- 2022-02-17 CN CN202210147509.3A patent/CN116667933A/en active Pending
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