阅读说明：本技术 拉曼放大器及其控制方法、装置以及存储介质 (Raman amplifier, method and apparatus for controlling the same, and storage medium ) 是由 刘飞 蔡潇 董婷 程丽晶 陶金涛 付成鹏 于 2021-08-24 设计创作，主要内容包括：本发明实施例提供了一种拉曼放大器及其控制方法、装置以及存储介质,所述拉曼放大器包括：拉曼泵浦激光器、连接器、第一光电探测器和控制单元；其中,所述拉曼放大器的工作模式包括：光时域反射检测模式；所述拉曼泵浦激光器,与所述连接器的第一端口连接,用于发射泵浦光,其中,在所述光时域反射检测模式下,所述泵浦光被视为检测光通过所述连接器被耦合至光纤；所述第一光电探测器,与所述连接器的第二端口连接,用于接收所述光纤基于所述检测光形成的反射光；所述控制单元,与所述第一光电探测器连接,用于根据所述反射光的光强,确定所述光纤的光时域反射检测结果。(The embodiment of the invention provides a Raman amplifier, a control method and a control device thereof, and a storage medium, wherein the Raman amplifier comprises: the Raman pump laser, the connector, the first photoelectric detector and the control unit; wherein the working mode of the Raman amplifier comprises: an optical time domain reflectometry detection mode; the Raman pump laser is connected with the first port of the connector and used for emitting pump light, wherein in the optical time domain reflection detection mode, the pump light is regarded as detection light and is coupled to an optical fiber through the connector; the first photoelectric detector is connected with the second port of the connector and used for receiving reflected light formed by the optical fiber based on the detection light; and the control unit is connected with the first photoelectric detector and used for determining the optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light.)

1. A raman amplifier, characterized in that it comprises: the Raman pump laser, the connector, the first photoelectric detector and the control unit; wherein the working mode of the Raman amplifier comprises: an optical time domain reflectometry detection mode;

the Raman pump laser is connected with the first port of the connector and used for emitting pump light, wherein in the optical time domain reflection detection mode, the pump light is regarded as detection light and is coupled to an optical fiber through the connector;

the first photoelectric detector is connected with the second port of the connector and used for receiving reflected light formed by the optical fiber based on the detection light;

and the control unit is connected with the first photoelectric detector and used for determining the optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light.

2. A raman amplifier according to claim 1, characterized in that it further comprises: a first wavelength division multiplexer;

the first wavelength division multiplexer at least comprises an output port, a first input port and a second input port;

the first input port of the first wavelength division multiplexer is connected with the third port of the connector;

an output port of the first wavelength division multiplexer for connection with the optical fiber;

a second input port of the first wavelength division multiplexer for receiving an input optical signal;

wherein the operating mode of the raman amplifier further comprises: a Raman amplification mode;

the first wavelength division multiplexer is configured to amplify the input optical signal received from the second input port based on the pump light received by the first input port in the raman amplification mode, and couple the input optical signal to the optical fiber through the output port.

3. Raman amplifier according to claim 1, characterized in that said control unit is further adapted to control the operation mode of said raman amplifier.

4. A raman amplifier according to claim 1, characterized in that it further comprises: a second wavelength division multiplexer;

the raman pump laser includes: a first raman pump laser and at least one second raman pump laser;

the first raman pump laser is connected with a first input port of the first wavelength division multiplexer sequentially through the connector and the second wavelength division multiplexer, and is used for emitting pump light serving as the detection light when the raman amplifier is in the optical time domain reflection detection mode; or emitting pump light for amplifying the input optical signal when the Raman amplifier is in the Raman amplification mode;

the second raman pump laser is connected with the first input port of the first wavelength division multiplexer through a second wavelength division multiplexer, and is used for stopping working when the raman amplifier is in the optical time domain detection mode; alternatively, pump light that amplifies the input optical signal is emitted when the raman amplifier is in the raman amplification mode.

5. Raman amplifier according to claim 4, characterized in that said second wavelength division multiplexer comprises: an output port, a first input port, and a second input port;

the output port of the second wavelength division multiplexer is connected with the first input port of the first wavelength division multiplexer;

the first input port of the second wavelength division multiplexer is connected with the third port of the connector;

and a second input port of the second wavelength division multiplexer is connected with the second Raman pump laser.

6. A raman amplifier according to claim 1, characterized in that it further comprises: a beam splitter and a second photodetector;

the input end of the optical splitter is connected with the input end of the input optical signal and is used for receiving the input optical signal;

a first output port of the optical splitter, connected to a second input port of the first wavelength division multiplexer, for coupling the input optical signal into the optical fiber through the first wavelength division multiplexer;

the second output port of the optical splitter is connected with the second photoelectric detector; the second photodetector is configured to detect an intensity of the input optical signal based on a split signal of the input optical signal output by the optical splitter;

and the control unit is connected with the second photoelectric detector and used for controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

7. A method for controlling a raman amplifier, which is applied to the raman amplifier provided in claims 1 to 6, the method comprising:

determining the working mode of the Raman amplifier;

when the working mode is an optical time domain reflection detection mode, the Raman pump laser emits pump light serving as detection light;

and determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

8. The method of controlling a raman amplifier according to claim 7, wherein the operation mode of the raman amplifier further comprises: a Raman amplification mode;

and when the working mode is a Raman amplification mode, the Raman pump laser emits pump light for amplifying input optical signals.

9. The method of controlling a raman amplifier according to claim 8, characterized in that said method further comprises:

determining the light intensity of the received input light signal;

and controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

10. The method of controlling a raman amplifier according to claim 9, characterized in that said raman pump laser comprises: a first raman pump laser and at least one second raman pump laser;

when the working mode is an optical time domain reflection detection mode, the first Raman pump laser emits pump light serving as the detection light, and the second Raman pump laser does not work;

and when the working mode is a Raman amplification mode, the first Raman pump laser and the at least one second Raman pump laser emit pump light for amplifying the input optical signal.

11. The method of controlling a raman amplifier according to claim 8, wherein said determining the result of said optical time domain reflection detection from the intensity of the reflected light formed by the optical fiber based on said detection light comprises:

determining the light intensity of all the reflected light within a preset time period;

when the light intensity of all the reflected light in the preset time period is smaller than a first preset value, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode; and/or when the light intensity of the reflected light existing in the preset time period is not smaller than a first preset value, determining that the optical time domain reflection detection does not pass, and enabling the Raman amplifier to enter an optical time domain reflection detection mode again.

12. The method of controlling a raman amplifier according to claim 11, characterized in that said method further comprises:

and outputting line alarm information when the light intensity of the reflected light is not less than a first preset value in the preset time period.

13. The method of controlling a raman amplifier according to claim 11, wherein after said raman amplifier enters a raman amplification mode, said method further comprises:

detecting the presence of the input optical signal in the optical fiber;

upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

14. The method of controlling a raman amplifier according to claim 13, wherein after said raman amplifier enters a raman amplification mode, said method further comprises:

determining an off-time period of the input optical signal when it is determined that the input optical signal is not present;

if the light-off length is smaller than a second preset value, the first Raman pump laser and at least one second Raman pump laser emit pump light for amplifying the input optical signal; and/or if the light-off length is larger than or equal to a second preset value, the Raman amplifier enters the optical time domain reflection detection mode again.

15. The method of controlling a raman amplifier according to claim 11, wherein after said raman amplifier enters a raman amplification mode, said method further comprises:

detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal;

and when the reflected light formed by the optical fiber based on the pump light for amplifying the input optical signal is not less than a third preset value, outputting line alarm information, and controlling the Raman amplifier to enter an optical time domain reflection detection mode again.

16. A control apparatus for a raman amplifier, the apparatus comprising: the device comprises a first determination module, a control module and a second determination module;

the first determining module is used for determining the working mode of the Raman amplifier;

the control module is used for controlling the Raman pump laser to emit pump light serving as detection light when the working mode is an optical time domain reflection detection mode;

and the second determining module is used for determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

17. A control apparatus for a raman amplifier, the apparatus comprising: a processor and a memory for storing a computer program capable of running on the processor;

wherein the processor is adapted to perform the steps of the method of any one of claims 7 to 15 when the computer program is run.

18. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of one of claims 7 to 15.

Technical Field

The present invention relates to the field of optical communications, and in particular, to a raman amplifier, a method and an apparatus for controlling the same, and a storage medium.

Background

The dense wavelength division multiplexing system is more and more widely applied today due to the fact that the dense wavelength division multiplexing system can provide higher communication capacity, and the raman amplifier has the advantages of being capable of achieving signals with any wavelength, wide in gain spectrum, low in noise coefficient and the like, so that the position of the raman amplifier in the dense wavelength division multiplexing system is also extremely important. However, because the output optical power of the raman pump laser used in the raman amplifier is high, when the connection end surface is dirty or scratched, the end surface burning phenomenon is easily caused by the overlarge output optical power of the raman pump laser, so that the pumping efficiency of the raman amplifier is rapidly reduced; in addition, the amplification quality of the Raman amplifier is easily influenced by a transmission optical fiber line, so that certain difficulty is caused to engineering debugging and maintenance, and the application of the Raman amplifier is limited to a certain extent.

When an optical cable line is constructed and maintained, an optical time domain reflection detector is generally used for testing the characteristics of an optical fiber, and meanwhile, the optical time domain reflection detector can also be used as an online monitoring device, but the optical time domain detector in the prior art is generally an external device which is connected between a transmission optical fiber and a Raman amplifier, so that the complexity of the device is increased, when the problem of the transmission optical fiber is found, the Raman amplifier needs to be manually controlled, the transmission optical fiber line cannot be automatically detected, and the working mode of the Raman amplifier is automatically controlled according to the detection result.

Disclosure of Invention

The embodiment of the invention provides a Raman amplifier, a control method and a control device thereof, and a storage medium.

The technical scheme of the embodiment of the invention is realized as follows:

an embodiment of the present invention provides a raman amplifier, including: the Raman pump laser, the connector, the first photoelectric detector and the control unit; wherein the working mode of the Raman amplifier comprises: an optical time domain reflectometry detection mode;

the Raman pump laser is connected with the first port of the connector and used for emitting pump light, wherein in the optical time domain reflection detection mode, the pump light is regarded as detection light and is coupled to an optical fiber through the connector;

the first photoelectric detector is connected with the second port of the connector and used for receiving reflected light formed by the optical fiber based on the detection light;

and the control unit is connected with the first photoelectric detector and used for determining the optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light.

In the above scheme, the raman amplifier further includes: a first wavelength division multiplexer;

the first wavelength division multiplexer at least comprises an output port, a first input port and a second input port;

the first input port of the first wavelength division multiplexer is connected with the third port of the connector;

an output port of the first wavelength division multiplexer for connection with the optical fiber;

a second input port of the first wavelength division multiplexer for receiving an input optical signal;

wherein the operating mode of the raman amplifier further comprises: a Raman amplification mode;

the first wavelength division multiplexer is configured to amplify the input optical signal received from the second input port based on the pump light received by the first input port in the raman amplification mode, and couple the input optical signal to the optical fiber through the output port.

In the above scheme, the control unit is further configured to control an operating mode of the raman amplifier.

In the above scheme, the raman amplifier further includes: a second wavelength division multiplexer;

the raman pump laser includes: a first raman pump laser and at least one second raman pump laser;

the first raman pump laser is connected with a first input port of the first wavelength division multiplexer sequentially through the connector and the second wavelength division multiplexer, and is used for emitting pump light serving as the detection light when the raman amplifier is in the optical time domain reflection detection mode; or emitting pump light for amplifying the input optical signal when the Raman amplifier is in the Raman amplification mode;

the second raman pump laser is connected with the first input port of the first wavelength division multiplexer through a second wavelength division multiplexer, and is used for stopping working when the raman amplifier is in the optical time domain detection mode; alternatively, pump light that amplifies the input optical signal is emitted when the raman amplifier is in the raman amplification mode.

In the above aspect, the second wavelength division multiplexer includes: an output port, a first input port, and a second input port;

the output port of the second wavelength division multiplexer is connected with the first input port of the first wavelength division multiplexer;

the first input port of the second wavelength division multiplexer is connected with the third port of the connector;

and a second input port of the second wavelength division multiplexer is connected with the second Raman pump laser.

In the above scheme, the raman amplifier further includes: a beam splitter and a second photodetector;

the input end of the optical splitter is connected with the input end of the input optical signal and is used for receiving the input optical signal;

a first output port of the optical splitter, connected to a second input port of the first wavelength division multiplexer, for coupling the input optical signal into the optical fiber through the first wavelength division multiplexer;

the second output port of the optical splitter is connected with the second photoelectric detector; the second photodetector is configured to detect an intensity of the input optical signal based on a split signal of the input optical signal output by the optical splitter;

and the control unit is connected with the second photoelectric detector and used for controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

An embodiment of the present invention further provides a method for controlling a raman amplifier, which is applied to the raman amplifier provided in claims 1 to 6, and the method includes:

determining the working mode of the Raman amplifier;

when the working mode is an optical time domain reflection detection mode, the Raman pump laser emits pump light serving as detection light;

and determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

In the above scheme, the operating mode of the raman amplifier further includes: a Raman amplification mode;

and when the working mode is a Raman amplification mode, the Raman pump laser emits pump light for amplifying input optical signals.

In the above scheme, the method further comprises:

determining the light intensity of the received input light signal;

and controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

In the above scheme, the raman pump laser includes: a first raman pump laser and at least one second raman pump laser;

when the working mode is an optical time domain reflection detection mode, the first Raman pump laser emits pump light serving as the detection light, and the second Raman pump laser does not work;

and when the working mode is a Raman amplification mode, the first Raman pump laser and the at least one second Raman pump laser emit pump light for amplifying the input optical signal.

In the foregoing solution, the determining a result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light includes:

determining the light intensity of all the reflected light within a preset time period;

when the light intensity of all the reflected light in the preset time period is smaller than a first preset value, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode; and/or when the light intensity of the reflected light existing in the preset time period is not smaller than a first preset value, determining that the optical time domain reflection detection does not pass, and enabling the Raman amplifier to enter an optical time domain reflection detection mode again.

In the above scheme, the method further comprises:

and outputting line alarm information when the light intensity of the reflected light is not less than a first preset value in the preset time period.

In the above scheme, after the raman amplifier enters the raman amplification mode, the method further includes:

detecting the presence of the input optical signal in the optical fiber;

upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

In the above scheme, after the raman amplifier enters the raman amplification mode, the method further includes:

determining an off-time period of the input optical signal when it is determined that the input optical signal is not present;

if the light-off length is smaller than a second preset value, the first Raman pump laser and at least one second Raman pump laser emit pump light for amplifying the input optical signal; and/or if the light-off length is larger than or equal to a second preset value, the Raman amplifier enters the optical time domain reflection detection mode again.

In the above scheme, after the raman amplifier enters the raman amplification mode, the method further includes:

detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal;

and when the reflected light formed by the optical fiber based on the pump light for amplifying the input optical signal is not less than a third preset value, outputting line alarm information, and controlling the Raman amplifier to enter an optical time domain reflection detection mode again.

An embodiment of the present invention further provides a control apparatus for a raman amplifier, where the apparatus includes: the device comprises a first determination module, a control module and a second determination module;

the first determining module is used for determining the working mode of the Raman amplifier;

the control module is used for controlling the Raman pump laser to emit pump light serving as detection light when the working mode is an optical time domain reflection detection mode;

and the second determining module is used for determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

The embodiment of the present invention further provides another raman amplifier control device, where the device includes: a processor and a memory for storing a computer program capable of running on the processor;

wherein the processor is configured to execute the steps of any one of the above methods for controlling a raman amplifier when running the computer program.

The embodiment of the invention also provides a computer storage medium, which is characterized in that the computer storage medium stores computer executable instructions; the computer executable instructions, when executed by the processor, enable the steps of a method of controlling a raman amplifier as described above.

In the embodiment, in the optical time domain reflection detection mode, the raman pump laser in the raman amplifier emits pump light serving as detection light, and is used as the laser for optical time domain reflection detection, so that the raman amplifier has both the optical time domain reflection detection function and the signal power amplification function, and external equipment does not need to be connected between the transmission optical fiber and the raman amplifier, and the structure of the equipment is simplified; after the first photoelectric detector receives reflected light formed by the optical fiber based on the detection light, the control unit determines an optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light, so that the Raman amplifier can judge whether to enter a Raman amplification mode according to the optical time domain reflection detection result, and the automatic control of the working mode of the Raman amplifier is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a raman amplifier provided by the present invention;

fig. 2 is a schematic structural diagram of another raman amplifier provided by the present invention;

fig. 3 is a schematic flow chart of a control method of a raman amplifier according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a working flow of a raman amplifier according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a control apparatus of a raman amplifier according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another raman amplifier control device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, the described embodiments should not be construed as limiting the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying only the number of technical features that are indicated. In the present invention, the terms "mounted," "connected," "secured," and the like are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, a detachable connection, or an integral connection. The two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through a communication path between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art as appropriate.

In the present application, the embodiments and features of the embodiments may be arbitrarily combined with each other without conflict. The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.

Before further detailed description of the embodiments of the present invention, terms and expressions in communication related to the embodiments of the present invention are described.

An embodiment of the present invention provides a raman amplifier, and fig. 1 is a schematic structural diagram of the raman amplifier provided by the present invention; as shown in fig. 1, the raman amplifier 10 includes: a raman pump laser 110, a connector 120, a first photodetector 130, and a control unit 140; wherein the working mode of the Raman amplifier comprises: an optical time domain reflectometry detection mode;

the raman pump laser 110 connected to the first port 1201 of the connector 120 for emitting pump light, wherein in the optical time domain reflection detection mode, the pump light is regarded as detection light and is coupled to the optical fiber 150 through the connector;

the first photodetector 130 connected to the second port 1202 of the connector for receiving the reflected light formed by the optical fiber 150 based on the detected light;

the control unit 140 is connected to the first photodetector 130, and configured to determine an optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light.

The principle of optical time domain reflection detection is that a laser is controlled to emit pulse laser, rayleigh backscattering and Fresnel reflection are generated when the pulse laser is transmitted on an optical fiber line, and according to the energy and time of the detected rayleigh backscattering and Fresnel reflection light, events such as the length and attenuation of an optical fiber and the distance between an optical fiber attenuation event point and the laser can be analyzed, so that certain judgment is made on the performance of the optical fiber.

Specifically, in this embodiment, the raman amplifier may be a backward raman amplifier; the reflected light includes: the detection light is transmitted in the light ray, and the Rayleigh back scattering light and the Fresnel reflection light are formed by optical phenomena such as reflection and/or scattering of the detection light by the optical fiber.

In some embodiments, the connector may be a ring connector; in other embodiments, the connector may also be a Y-connector.

Specifically, in the present embodiment, the pump light emitted by the raman pump laser 110 in the optical time domain reflection detection mode is regarded as the detection light for detecting the optical fiber 150; a first photodetector 130 coupled to the second port 1202 of the annular connector for receiving rayleigh backscattered light and fresnel reflected light formed by the optical fiber 150 based on the detected light; the control unit is connected with the first photodetector 130 to determine an optical time domain reflection detection result of the optical fiber according to the received light intensities of the rayleigh backscattered light and the fresnel reflected light;

if the light intensity of the received Rayleigh back scattering light and Fresnel reflection light exceeds a certain threshold value, the end face of the optical fiber is dirty, and the end face may be burned or damaged when the pump is started up in a Raman mode; or poor connection exists, so that the amplification quality of Raman is affected. In this case, the optical fiber exceeds a certain threshold value, and it can be determined that the optical time domain reflection detection result of the optical fiber does not pass. And if the light intensity of the received Rayleigh back scattering light and Fresnel reflection light does not exceed a certain threshold value, determining that the optical time domain reflection detection result of the optical fiber passes through.

In the embodiment, in the optical time domain reflection detection mode, the raman pump laser in the raman amplifier emits pump light serving as detection light, and is used as the laser for optical time domain reflection detection, so that the raman amplifier has both the optical time domain reflection detection function and the signal power amplification function, and external equipment does not need to be connected between the transmission optical fiber and the raman amplifier, and the structure of the equipment is simplified; after the first photoelectric detector receives reflected light formed by the optical fiber based on the detection light, the control unit determines an optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light, so that the Raman amplifier can judge whether to enter a Raman amplification mode according to the optical time domain reflection detection result, and the automatic control of the working mode of the Raman amplifier is realized.

Further, the raman amplifier 10 further includes: a first wavelength division multiplexer 160; the first wavelength division multiplexer 160 at least includes an output port 1603, a first input port 1601 and a second input port 1602;

a first input port 1601 of the first wavelength division multiplexer 160, connected to the third port 1203 of the connector 120; an output port 1603 of the first wavelength division multiplexer for connecting with the optical fiber 150; a second input port 1602 of the first wavelength division multiplexer, configured to receive an input optical signal;

wherein the operating mode of the raman amplifier further comprises: a Raman amplification mode; the first wavelength division multiplexer 160 is configured to amplify the input optical signal received from the second input port 1602 based on the pump light received by the first input port 1601 and couple the input optical signal to the optical fiber 150 through the output port 1603 in the raman amplification mode.

Specifically, at the transmitting end, the wavelength division multiplexer combines two or more optical carrier signals carrying various information and having different wavelengths together, and couples the optical carrier signals to the same optical fiber of the optical line for transmission.

Specifically, in this embodiment, the first wavelength division multiplexer is used for a transmitting end; in the raman amplification mode, the first wavelength division multiplexer 160 couples the pump light transmitted by the raman pump laser 110 and received by the first input port 1601 and the input optical signal received by the second input port 1602 into the optical fiber, so as to amplify the input optical signal by the raman pump laser.

Further, the control unit 140 is further configured to control an operation mode of the raman amplifier 10.

In one embodiment, the control unit is further configured to receive a mode control instruction sent by the user equipment, and control an operating mode of the raman amplifier according to the mode control instruction.

In another embodiment, the control unit may control the operation mode of the raman amplifier according to a built-in mode control command at the time point of the mode rating.

Illustratively, the control unit is adapted to control the raman amplifier for optical time domain reflection detection mode only, without entering raman amplification mode. Further exemplarily, the control unit may be further configured to control the raman amplifier to enter an automatic control mode, that is, to execute the optical time domain reflectometry detection mode, and determine whether to enter the raman amplification mode according to the optical time domain reflectometry detection result, or to execute the optical time domain reflectometry detection mode again.

Further, the raman amplifier 10 further includes: a second wavelength division multiplexer 1701; the raman pump laser 110 includes: a first raman pump laser 1101 and at least one second raman pump laser 1102;

the first raman pump laser 1101 is connected to the first input port 1601 of the first wavelength division multiplexer 160 through the connector 120 and the second wavelength division multiplexer 170 in sequence, and is configured to emit pump light as the detection light when the raman amplifier 10 is in the optical time domain reflection detection mode; or, when the raman amplifier 10 is in the raman amplification mode, emitting pump light for amplifying the input optical signal;

the second raman pump laser 1102 is connected to the first input port 1601 of the first wavelength division multiplexer 160 through the second wavelength division multiplexer 170, and is configured to stop working when the raman amplifier 10 is in the optical time domain detection mode; alternatively, when the raman amplifier 10 is in the raman amplification mode, pump light for amplifying the input optical signal is emitted.

Specifically, there may be one or more second raman pump lasers 1102.

Specifically, when the raman amplifier 10 is in the optical time domain reflection detection mode, the first raman pump laser 1101 emits pump light as the detection light, and the at least one second raman pump laser 1102 stops operating; when the raman amplifier 10 is in the raman amplification mode, the first raman pump laser 1101 and the at least one second raman pump laser 1102 each emit pump light for amplifying the input optical signal.

Further, the second wavelength division multiplexer 170 includes: an output port 1701, a first input port 1703, and a second input port 1702;

an output port 1701 of the second wavelength division multiplexer connected to the first input port 1601 of the first wavelength division multiplexer 160; the first input port 1703 of the second wavelength division multiplexer is connected with the third port 1203 of the connector; a second input port 1702 of the second wavelength division multiplexer is connected to the second raman pump laser 1102.

Specifically, when the raman amplifier 10 is in the raman amplification mode, the second wavelength division multiplexer 170 is configured to couple pump light emitted by the first raman pump laser 1101 and the at least one second raman pump laser 1102 for amplifying the input optical signal into the first wavelength division multiplexer 160, couple pump light emitted by the first raman pump laser 1101 and the at least one second raman pump laser 1102 received by the first input port 1601 and used for amplifying the input optical signal through the first wavelength division multiplexer 160, and couple input optical signals received by the second input port 1602 into the optical fiber, so as to amplify the input optical signals through the raman pump lasers.

Further, the raman amplifier 10 further includes: a beam splitter 180 and a second photodetector 190; an input end 1801 of the optical splitter 180 is connected to the input end 100 of the input optical signal, and is configured to receive the input optical signal; a first output port 1802 of the optical splitter 180, connected to the second input port 1602 of the first wavelength division multiplexer 160, for coupling the input optical signal into the optical fiber 150 through the first wavelength division multiplexer 160;

a second output port 1803 of the optical splitter 180 is connected to the second photodetector 190; the second photodetector 190 is configured to detect an intensity of the input optical signal based on a split signal of the input optical signal output by the optical splitter 180;

the control unit 140 is connected to the second photodetector 190, and configured to control a pumping gain of the raman pump laser in the raman amplification mode according to the light intensity of the input optical signal.

An embodiment of the present invention provides another raman amplifier, and fig. 2 is a schematic structural diagram of another raman amplifier provided by the present invention; as shown in fig. 2, the raman amplifier 20 includes: a raman pump laser 210, a connector 220, a first photodetector 230, a control unit 240, an optical fiber 250, a first wavelength division multiplexer 260, a second wavelength division multiplexer 270, an optical splitter 280, a second photodetector 290;

in this embodiment, the raman amplifier is a forward raman amplifier; the reflected light includes: transmitting Rayleigh back scattering light and Fresnel reflection light formed by optical phenomena such as reflection and/or scattering of the detection light by optical fibers in light; the working modes of the Raman amplifier comprise: an optical time domain reflectometry detection mode and a raman amplifier mode;

the raman pump laser 210 connected to the first port 2201 of the connector 220 for emitting pump light, wherein in the optical time domain reflection detection mode, the pump light is regarded as detection light and is coupled to the optical fiber 250 through the connector;

the first photodetector 230 connected to the second port 2202 of the connector for receiving the reflected light formed by the optical fiber 250 based on the detected light;

the control unit 240 is connected to the first photodetector 230, and configured to determine an optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light.

Specifically, the reflected light formed by the optical fiber 250 based on the detection light includes rayleigh backscattered light and fresnel reflected light formed based on the detection;

specifically, in the present embodiment, the pump light emitted by the raman pump laser 210 in the optical time domain reflection detection mode is regarded as the detection light for detecting the line of the optical fiber 250; a first photodetector 230 coupled to the second port 2202 of the annular connector for receiving rayleigh backscattered light and fresnel reflected light formed by the optical fiber 250 based on the detected light; the control unit is connected with the first photodetector 230 to determine the optical time domain reflection detection result of the optical fiber according to the light intensity of the received rayleigh backscattered light and fresnel reflected light;

in the embodiment, in the optical time domain reflection detection mode, the raman pump laser in the raman amplifier emits pump light serving as detection light, and is used as the laser for optical time domain reflection detection, so that the raman amplifier has both the optical time domain reflection detection function and the signal power amplification function, and external equipment does not need to be connected between the transmission optical fiber and the raman amplifier, and the structure of the equipment is simplified; after the first photoelectric detector receives reflected light formed by the optical fiber based on the detection light, the control unit determines an optical time domain reflection detection result of the optical fiber according to the light intensity of the reflected light, so that the Raman amplifier can judge whether to enter a Raman amplification mode according to the optical time domain reflection detection result, and the automatic control of the working mode of the Raman amplifier is realized.

Further, the first wavelength division multiplexer 260 includes at least a port 2603, an input port 2601 and an output port 2602; the optical splitter 280 includes: an input port 2801 and an output port 2802;

an input port 2601 of the first wavelength division multiplexer 260 connected to the third port 2203 of the connector 220, for amplifying the input optical signal received from the port 2603 based on the pump light received by the input port 2601 in the raman amplification mode, and coupling to the optical fiber 250 through the port 2603;

an output port 2602 of the first wavelength division multiplexer 260, connected to an input 2801 of the optical splitter 280, for inputting the input optical signal received by the port 2603 into the optical splitter 280; an output port 2802 of the optical splitter 280 is connected to the second photodetector 290, and is configured to detect an intensity of the input optical signal based on an optical splitting signal of the input optical signal received by the optical splitter 280;

specifically, in the present embodiment, in the raman amplification mode, the first wavelength division multiplexer 260 couples the pump signal transmitted by the raman pump laser 210 and received by the input port 2601 and the input optical signal received by the port 2603 into the optical fiber, so as to amplify the input optical signal by the raman pump laser.

Further, the control unit 240 is further configured to control an operation mode of the raman amplifier 20.

Specifically, in an embodiment, the control unit is further configured to receive a mode control instruction sent by the user equipment, and control an operating mode of the raman amplifier according to the mode control instruction.

In another embodiment, the control unit may control the operation mode of the raman amplifier according to a built-in mode control command at the time point of the mode rating.

Exemplarily, the control unit is configured to control the raman amplifier to be used only in the optical time domain reflection detection mode, and not to enter the raman amplification mode; further exemplarily, the control unit may be further configured to control the raman amplifier to enter an automatic control mode, that is, to execute the optical time domain reflectometry detection mode, and determine whether to enter the raman amplification mode according to the optical time domain reflectometry detection result, or to execute the optical time domain reflectometry detection mode again.

Further, the raman amplifier 20 further includes: a second wavelength division multiplexer 270; the raman pump laser 210 includes: a first raman pump laser 2101 and at least one second raman pump laser 2102;

the first raman pump laser 2101 is connected to the input port 1601 of the first wavelength division multiplexer 260 sequentially through the connector 220 and the second wavelength division multiplexer 270, and is configured to emit pump light as the detection light when the raman amplifier 20 is in the optical time domain reflection detection mode; or, when the raman amplifier 20 is in the raman amplification mode, emitting pump light for amplifying the input optical signal;

the second raman pump laser 2102 is connected to the input port 2601 of the first wavelength division multiplexer 260 through a second wavelength division multiplexer 270, and is configured to stop working when the raman amplifier 20 is in the optical time domain detection mode; alternatively, when the raman amplifier 20 is in the raman amplification mode, pump light for amplifying the input optical signal is emitted.

Specifically, the number of the second raman pump lasers 2102 may be one or more.

Specifically, when the raman amplifier 20 is in the optical time domain reflection detection mode, the first raman pump laser 2101 emits pump light as the detection light, and at least one second raman pump laser 2102 stops operating; when the raman amplifier 20 is in the raman amplification mode, the first raman pump laser 2101 and the at least one second raman pump laser 2102 each emit pump light for amplifying the input optical signal.

Further, the second wavelength division multiplexer 270 includes: an output port 2701, a first input port 2703, and a second input port 2702;

an output port 2701 of the second wavelength division multiplexer is connected to an input port 2601 of the first wavelength division multiplexer 260; the first input port 2703 of the second wavelength division multiplexer is connected with the third port 2203 of the connector; the second input port 2702 of the second wavelength division multiplexer is connected to the second raman pump laser 2102.

Specifically, when the raman amplifier 20 is in the raman amplification mode, the second wavelength division multiplexer 270 is configured to couple pump light emitted by the first raman pump laser 2101 and the at least one second raman pump laser 2102 and used for amplifying the input optical signal into the first wavelength division multiplexer 260, couple pump light emitted by the first raman pump laser 1101 and the at least one second raman pump laser 2102 and received by the input port 2601 and received by the first wavelength division multiplexer 260 and received by the second input port 2602 into the optical fiber, so as to amplify the input optical signal by the raman pump lasers.

The control unit 240 is connected to the second photodetector 290, and configured to control a pumping gain of the raman pump laser in the raman amplification mode according to the light intensity of the input optical signal.

The embodiment of the invention provides a control method of a Raman amplifier, which is applied to the Raman amplifier provided by the embodiment. Fig. 3 is a schematic flow chart of a control method of a raman amplifier according to the present invention; as shown in fig. 3, the method includes:

step S301: determining the working mode of the Raman amplifier;

step S302: when the working mode is an optical time domain reflection detection mode, the Raman pump laser emits pump light serving as detection light;

step S303: and determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

Further, in step S302, the operation mode of the raman amplifier further includes: a Raman amplification mode; and when the working mode is a Raman amplification mode, the Raman pump laser emits pump light for amplifying input optical signals.

In the above step S303, the reflected light includes rayleigh backscattered light and fresnel reflected light formed based on the detection light.

Further, the method further comprises: determining the light intensity of the received input light signal; and controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

Specifically, after the light intensity of the input optical signal is determined, the light intensity of the pump light emitted by the raman pump laser for amplifying the input optical signal is determined, so as to control the pumping gain of the raman pump laser in the raman amplification mode.

In the embodiment, in the optical time domain reflection detection mode, the raman pump laser in the raman amplifier emits pump light serving as detection light, and is used as the laser for optical time domain reflection detection, so that the raman amplifier has both the optical time domain reflection detection function and the signal power amplification function, and external equipment does not need to be connected between the transmission optical fiber and the raman amplifier, and the structure of the equipment is simplified; after the reflected light formed by the optical fiber based on the detection light is determined, the optical time domain reflection detection result of the optical fiber is determined according to the light intensity of the reflected light, so that the Raman amplifier can judge whether the Raman amplifier can enter a Raman amplification mode according to the optical time domain reflection detection result, and the automatic control of the working mode of the Raman amplifier is realized.

Further, the raman pump laser includes: a first raman pump laser and at least one second raman pump laser; when the working mode is an optical time domain reflection detection mode, the first Raman pump laser emits pump light serving as the detection light, and the second Raman pump laser does not work; and when the working mode is a Raman amplification mode, the first Raman pump laser and the at least one second Raman pump laser emit pump light for amplifying the input optical signal.

Specifically, the number of the second raman pump lasers may be one or more.

Further, the determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light includes: determining the light intensity of all the reflected light within a preset time period; when the light intensity of all the reflected light in the preset time period is smaller than a first preset value, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode; and/or when the light intensity of the reflected light existing in the preset time period is not smaller than a first preset value, determining that the optical time domain reflection detection does not pass, and enabling the Raman amplifier to enter an optical time domain reflection detection mode again.

Specifically, the preset time period may be an initialization time period, or a user-defined time period, which is not specifically limited herein; the first preset value is an insertion loss threshold value of the reflected light;

specifically, the light intensity of all reflected light formed by the optical fibers received in a preset time period based on the detection light is determined; when the light intensity of all the reflected light is smaller than a first preset value within the preset time period, determining that the optical fiber line has no phenomena of end surface contamination and poor connection, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode;

and when the light intensity of one or more reflected lights in the preset time period is not less than a first preset value, the phenomenon that the end face of the optical fiber circuit is dirty or the connection is poor exists on the surface, the optical time domain reflection detection is determined not to pass, and the Raman amplifier enters an optical time domain reflection detection mode again.

Further, the method further comprises: and outputting line alarm information when the light intensity of the reflected light is not less than a first preset value in the preset time period.

Specifically, when the light intensity of the reflected light is not less than a first preset value within a preset time period, the raman amplifier outputs line alarm information, where the line alarm information at least includes a light intensity value of the reflected light and an interval duration between receiving the reflected light and emitting the detection light; and the user terminal determines the position of the optical fiber attenuation event, namely the dirty position of the end face or the position with poor connection in the optical fiber circuit according to the interval duration in the circuit alarm information.

Further, after the raman amplifier enters the raman amplification mode, the method further includes: detecting the presence of the input optical signal in the optical fiber; upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

Specifically, after the raman amplifier enters a raman amplification mode, detecting whether a light break phenomenon exists in the optical fiber, that is, detecting whether the input optical signal exists in the optical fiber; upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

Further, after the raman amplifier enters the raman amplification mode, the method further includes: determining an off-time period of the input optical signal when it is determined that the input optical signal is not present; if the light-off length is smaller than a second preset value, the first Raman pump laser and at least one second Raman pump laser emit pump light for amplifying the input optical signal; and/or if the light-off length is larger than or equal to a second preset value, the Raman amplifier enters the optical time domain reflection detection mode again.

Specifically, the second preset value may be an initialization duration, or may also be a user-defined duration, which is not specifically limited herein;

specifically, after the raman amplifier enters a raman amplification mode, if the optical fiber is detected to have no input optical signal, the surface of the optical fiber has a light interruption phenomenon, and the light interruption time of the input optical signal is determined; when the light-off time length is smaller than a second preset value, controlling a first Raman pump laser and at least one second Raman pump laser to switch on a pump and transmitting pump light for amplifying the input optical signal;

and if the light-off length is larger than or equal to a second preset value, controlling the first Raman pump laser and the at least one second Raman pump laser not to be started, and enabling the Raman amplifier to enter the optical time domain reflection detection mode again.

Further, after the raman amplifier enters the raman amplification mode, the method further includes: detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal; and when the reflected light formed by the optical fiber based on the pump light for amplifying the input optical signal is not less than a third preset value, outputting line alarm information, and controlling the Raman amplifier to enter an optical time domain reflection detection mode again.

Specifically, in some embodiments, the third preset value may be equal to the first preset value; in other embodiments, the third preset value may also be different from the first preset value, and may be customized by a user or may use a default value of the system.

Hereinafter, a method for controlling a raman amplifier according to an embodiment of the present invention is described with reference to a specific example, as shown in fig. 4:

step 1: a user selects the working mode of the Raman amplifier;

a user sends an instruction to the control unit, and if the Raman amplifier is selected to be only used in the optical time domain reflection detection mode and not to enter the Raman amplification mode, the step 2-4 is executed; and if the optical time domain reflection detection mode is selected to enter the automatic control mode, executing the optical time domain reflection detection mode, judging whether to enter the Raman amplification mode or not according to the optical time domain reflection detection result, or executing the optical time domain reflection detection mode again, and executing 2-10.

Step 2: entering an optical time domain reflection detection mode, and emitting pump light serving as detection light by a Raman pump laser;

and step 3: determining the light intensity of reflected light formed by the optical fiber based on the detection light through a first photoelectric detector and a control center;

the Rayleigh back scattering light and the Fresnel reflection light generated in the detection optical fiber enter a first photoelectric detector through a circulator to be detected, and a control center analyzes events such as attenuation and reflection of light in a distance from a near end, the distance of the events and the like according to the energy and time of the Rayleigh back scattering light and the Fresnel reflection light detected by the first photoelectric detector;

and 4, step 4: comparing the light intensity of all the reflected lights in a preset time period with a preset insertion loss threshold value of the reflected lights, and outputting an optical time domain reflection detection result;

if the light intensity of all the reflected lights is smaller than the preset insertion loss threshold value of the reflected lights, outputting light time domain reflection detection to pass, and executing the step 5; if the light intensity of one or more reflected lights is not less than the preset insertion loss threshold of the reflected lights, it is considered that the end surface fouling on the line may cause the burning or damage of the end surface when the raman pump is turned on, or the raman amplification quality is affected due to the poor connection, the output light time domain reflection detection is not passed, and step 6 is executed.

And 5: entering a Raman amplification mode.

Step 6: the line alarm information is output and step 2 is performed.

And 7: detecting whether the optical fiber is broken;

detecting the presence of the input optical signal in the optical fiber; if the input optical signal is determined to exist, executing step 8; if it is determined that the input optical signal is not present, step 9 is performed.

And 8: and controlling the first Raman pump laser and at least one second Raman pump laser to be started to pump, and emitting pump light for amplifying the input optical signal.

And step 9: determining an off-time period of the input optical signal;

if the light-off time is less than a second preset value, only step 8 is needed; and if the light-off length is larger than or equal to a second preset value, executing the step 2.

Step 10: detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal;

when the reflected light formed by the optical fiber based on the pump light amplifying the input optical signal is not less than a third preset value, executing step 6; otherwise, step 8 is performed.

As shown in fig. 5, fig. 5 is a schematic structural diagram of a control apparatus of a raman amplifier according to an embodiment of the present invention, where the apparatus includes: a first determination module 501, a control module 502, and a second determination module 503;

the first determining module 501 is configured to determine an operating mode of the raman amplifier;

the control module 502 is configured to control the raman pump laser to emit pump light serving as detection light when the working mode is an optical time domain reflection detection mode;

the second determining module 503 is configured to determine the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

In order to implement the method according to the embodiment of the present invention, another raman amplifier control apparatus according to the embodiment of the present invention is provided, and specifically, as shown in fig. 6, the apparatus 60 includes a processor 601 and a memory 602 for storing a computer program capable of running on the processor;

wherein, the processor 601 is configured to execute, when running the computer program, the following steps: determining the working mode of the Raman amplifier; when the working mode is an optical time domain reflection detection mode, the Raman pump laser emits pump light serving as detection light; and determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: the operating mode of the raman amplifier further comprises: a Raman amplification mode; and when the working mode is a Raman amplification mode, the Raman pump laser emits pump light for amplifying input optical signals.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: determining the light intensity of the received input light signal; and controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: the raman pump laser includes: a first raman pump laser and at least one second raman pump laser; when the working mode is an optical time domain reflection detection mode, the first Raman pump laser emits pump light serving as the detection light, and the second Raman pump laser does not work; and when the working mode is a Raman amplification mode, the first Raman pump laser and the at least one second Raman pump laser emit pump light for amplifying the input optical signal.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: determining the light intensity of all the reflected light within a preset time period;

when the light intensity of all the reflected light in the preset time period is smaller than a first preset value, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode; and/or when the light intensity of the reflected light existing in the preset time period is not smaller than a first preset value, determining that the optical time domain reflection detection does not pass, and enabling the Raman amplifier to enter an optical time domain reflection detection mode again.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: and outputting line alarm information when the light intensity of the reflected light is not less than a first preset value in the preset time period.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: detecting the presence of the input optical signal in the optical fiber; upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: determining an off-time period of the input optical signal when it is determined that the input optical signal is not present; if the light-off length is smaller than a second preset value, the first Raman pump laser and at least one second Raman pump laser emit pump light for amplifying the input optical signal; and/or if the light-off length is larger than or equal to a second preset value, the Raman amplifier enters the optical time domain reflection detection mode again.

In an embodiment, the processor 601 is further configured to execute, when running the computer program, the following: detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal; and when the reflected light formed by the optical fiber based on the pump light for amplifying the input optical signal is not less than a third preset value, outputting line alarm information, and controlling the Raman amplifier to enter an optical time domain reflection detection mode again.

Of course, in practical applications, as shown in fig. 6, the apparatus 60 may further include: at least one network interface 603. The various components of the raman amplifier control device 60 are coupled together by a bus system 604. It is understood that the bus system 604 is used to enable communications among the components. The bus system 604 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 604 in fig. 6. The number of the processors 601 may be at least one. The network interface 603 is used for communication between the raman amplifier control device 60 and other devices in a wired or wireless manner.

The memory 602 in the embodiment of the present invention is used to store various types of data to support the operation of the control device 60 of the raman amplifier.

The method disclosed by the above-mentioned embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 601 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 602, and the processor 601 reads the information in the memory 602 and performs the steps of the aforementioned methods in conjunction with its hardware.

In an exemplary embodiment, the control Device 60 of the raman amplifier may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

In an exemplary embodiment, the present invention further provides a computer readable storage medium, such as a memory 602 including a computer program, which is executable by a processor 601 of the raman amplifier control device 60 to perform the steps of the foregoing method.

Specifically, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs: determining the working mode of the Raman amplifier; when the working mode is an optical time domain reflection detection mode, the Raman pump laser emits pump light serving as detection light; and determining the result of the optical time domain reflection detection according to the light intensity of the reflected light formed by the optical fiber based on the detection light.

In one embodiment, the computer program, when executed by the processor, performs: the operating mode of the raman amplifier further comprises: a Raman amplification mode; and when the working mode is a Raman amplification mode, the Raman pump laser emits pump light for amplifying input optical signals.

In one embodiment, the computer program, when executed by the processor, performs: determining the light intensity of the received input light signal; and controlling the pumping gain of the Raman pump laser in the Raman amplification mode according to the light intensity of the input optical signal.

In one embodiment, the computer program, when executed by the processor, performs: the raman pump laser includes: a first raman pump laser and at least one second raman pump laser; when the working mode is an optical time domain reflection detection mode, the first Raman pump laser emits pump light serving as the detection light, and the second Raman pump laser does not work; and when the working mode is a Raman amplification mode, the first Raman pump laser and the at least one second Raman pump laser emit pump light for amplifying the input optical signal.

In one embodiment, the computer program, when executed by the processor, performs: determining the light intensity of all the reflected light within a preset time period; when the light intensity of all the reflected light in the preset time period is smaller than a first preset value, determining that the optical time domain reflection detection is passed, and enabling the Raman amplifier to enter a Raman amplification mode; and/or when the light intensity of the reflected light existing in the preset time period is not smaller than a first preset value, determining that the optical time domain reflection detection does not pass, and enabling the Raman amplifier to enter an optical time domain reflection detection mode again.

In one embodiment, the computer program, when executed by the processor, performs: and outputting line alarm information when the light intensity of the reflected light is not less than a first preset value in the preset time period.

In one embodiment, the computer program, when executed by the processor, performs: detecting the presence of the input optical signal in the optical fiber; upon determining the presence of the input optical signal, the first and at least one of the second raman pump lasers emit pump light for amplifying the input optical signal.

In one embodiment, the computer program, when executed by the processor, performs: determining an off-time period of the input optical signal when it is determined that the input optical signal is not present; if the light-off length is smaller than a second preset value, the first Raman pump laser and at least one second Raman pump laser emit pump light for amplifying the input optical signal; and/or if the light-off length is larger than or equal to a second preset value, the Raman amplifier enters the optical time domain reflection detection mode again.

In one embodiment, the computer program, when executed by the processor, performs: detecting the light intensity of reflected light formed by the optical fiber based on the pump light amplifying the input optical signal; and when the reflected light formed by the optical fiber based on the pump light for amplifying the input optical signal is not less than a third preset value, outputting line alarm information, and controlling the Raman amplifier to enter an optical time domain reflection detection mode again.

It should be noted that: the computer-readable storage medium provided by the embodiment of the invention can be memories such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM; or may be various devices including one or any combination of the above memories.

The above description is only an example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.