WO2021197252A1

WO2021197252A1 - Optical signal compensation apparatus, method and device, and computer-readable storage medium

Info

Publication number: WO2021197252A1
Application number: PCT/CN2021/083547
Authority: WO
Inventors: 罗俊; 李杨
Original assignee: 华为技术有限公司
Priority date: 2020-04-03
Filing date: 2021-03-29
Publication date: 2021-10-07
Also published as: CN113497666B; CN113497666A

Abstract

Disclosed are an optical signal compensation apparatus, method and device, and a computer-readable storage medium, which belong to the technical field of optical transmission. According to a first power measurement value and a second power measurement value that are measured by a power measurement unit, the apparatus determines, by means of a controller, a plurality of first gain values corresponding to a plurality of wavelengths of optical signals transmitted in the next span of an optical fiber, and issues a target control instruction to an optical amplifier. Since the plurality of first gain values carried in the target control instruction correspond, on a one-to-one basis, to the wavelengths of the optical signals transmitted in the next span of the optical fiber, even if the wavelength of a light beam in a fourth optical signal currently received by the optical amplifier is different from the wavelength of a light beam in a target optical signal, that is, there is dynamic wavelength switching between the fourth optical signal and the target optical signal, the optical amplifier can still amplify the received fourth optical signal according to the target control instruction, so as to compensate for the fourth optical signal.

Description

Optical signal compensation device, method, equipment and computer readable storage medium

This application claims the priority of the Chinese patent application filed on April 03, 2020 with the application number 202010261501.0 and the invention title "Optical signal compensation device, method, equipment and computer readable storage medium", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of optical transmission technology, and in particular to an optical signal compensation device, method, equipment, and computer-readable storage medium.

Background technique

In order to avoid the spectral tilt caused by the Raman effect when the optical signal is transmitted in the optical fiber, an optical amplifier can be used to compensate the optical signal.

At present, the optical channel power detection device (optical channel monitor, OCM) and the controller in FIG. 1 can be used to control the gain value of the optical amplifier to compensate for the spectral tilt caused by the Raman effect of the optical signal. This is a schematic diagram of an optical signal compensation method provided by an embodiment of this application. In Figure 1, the optical splitter divides the optical signal emitted by the optical amplifier into two parts, and transmits a part of the optical signal to the optical fiber, so that this part of the optical signal can be transmitted in the optical fiber, and the optical splitter transmits another part to the OCM For a part of the optical signal, the OCM can detect the optical power of the beam of each wavelength in the input optical signal, and generate the optical power of the beam of each wavelength to the controller. The controller predicts the optical power of each wavelength according to the optical power of the beam of each wavelength. The Raman gain value generated when the light beam is transmitted in the optical fiber. For any wavelength of the light beam, the controller controls the amplification gain value of the optical amplifier to be opposite to the Raman gain value corresponding to the wavelength, so as to compensate for the light beam of this wavelength transmitted in the optical fiber The impact caused by the Raman effect.

However, the wavelength distribution of the optical signal transmitted in the optical fiber in the wavelength division multiplexing system will dynamically change. For example, the schematic diagram of a wavelength division multiplexing system provided by an embodiment of the present application shown in FIG. The optical add-drop multiplexer (reconfigurable optical add-drop multiplexer, ROADM) can drop a part of the wavelength of the received optical signal to the optical receiver of the local node, and transmit the remaining wavelength of the received optical signal to the The optical fiber, that is, the phenomenon of drop-off occurs, so that the optical signal transmitted in the optical fiber lacks a part of the light beam of the wavelength, which will cause the wavelength distribution of the optical signal transmitted in the optical fiber to dynamically change; or, the optical emission of the local node The machine can also emit beams of other wavelengths to the ROADM. ROADM can combine the beams of other wavelengths emitted by the optical transmitter and the received optical signal to form a new optical signal, and transmit the new optical signal to the optical fiber, which means that the wave has occurred. Phenomenon, at this time, when a new optical signal is transmitted in the optical fiber, since light beams of other wavelengths are added to the new optical signal, the wavelength distribution of the optical signal transmitted in the optical fiber will dynamically change.

The time dimension of the dynamic change of the wavelength distribution of the optical signal transmitted in the optical fiber is generally on the order of milliseconds, while the OCM will perform scanning power detection on the input optical signal according to the wavelength. The detection cycle is generally on the second level. Therefore, OCM is detecting During the process of part of the optical signal of a certain optical signal output by the optical amplifier, the optical signal received by the optical amplifier may have changed from a certain optical signal (old optical signal) to a new optical signal, and the controller determines that it is based on the OCM detection result. Compensate the amplification gain value of the old optical signal, then, the controller controls the optical amplifier to compensate the new optical signal based on the amplification gain value of the compensated old optical signal, which will not only cause the old optical signal to not be compensated in time, but also cause the new optical signal to not be correct compensate. That is, the optical amplifier cannot compensate the received optical signal in real time based on the OCM detection result.

Summary of the invention

The embodiments of the present application provide an optical signal compensation device, method, equipment, and computer-readable storage medium, which can compensate optical signals in real time. The technical scheme is as follows:

In a first aspect, an optical signal compensation device is provided. The device includes an optical amplifier, an optical splitter, a power detection unit, and a controller; wherein the optical amplifier, optical splitter, power detection unit, and controller The connection relationship may be: the optical amplifier is connected to the optical splitter and the controller, the optical splitter is connected to the power detection unit, and the power detection unit is connected to the controller. connect;

The optical splitter is used to split the target optical signal emitted by the optical amplifier to obtain a first optical signal, a second optical signal, and a third optical signal, and transmit the first optical signal to the next optical fiber , Transmitting the second optical signal and the third optical signal to the power detection unit;

The power detection unit is configured to perform power detection on the second optical signal and the third optical signal respectively, and send target power information carrying the first power detection value and the second power detection value to the controller;

The controller is configured to determine, according to the first power detection value and the second power detection value carried in the target power information, a plurality of first powers corresponding to a plurality of wavelengths of an optical signal transmitted in the next optical fiber A gain value, sending a target control command to the optical amplifier;

The optical amplifier is configured to receive the fourth optical signal outputted from the previous optical fiber, and amplify the fourth optical signal according to the multiple first gain values in the target control instruction to obtain the fifth optical signal. Signal, transmitting the fifth optical signal to the optical splitter;

Wherein, the target optical signal includes light beams of multiple wavelengths, the next cross-fiber is used to transmit the optical signal output by the device, and the first power detection value is the detected light of the second optical signal. Power, the second power detection value is the detected optical power of the third optical signal after filtering, the target control instruction includes the plurality of first gain values, the plurality of first gain values and the The wavelengths of the optical signals transmitted in the next optical fiber span one-to-one correspondence, and the previous optical fiber is used to output optical signals to the device.

According to the first power detection value and the second power detection value detected by the power detection unit, the device determines a plurality of first gain values corresponding to a plurality of wavelengths of the optical signal transmitted in the next fiber The amplifier issues a target control instruction, because the multiple first gain values carried by the target control instruction correspond to the wavelength of the optical signal transmitted in the next optical fiber, even though the fourth optical signal currently received by the optical amplifier corresponds to the target optical signal. The wavelength of the middle beam is different, that is, the wavelength of the fourth optical signal and the target optical signal are dynamically switched. The optical amplifier can also amplify the received fourth optical signal according to the target control command to compensate for the fourth optical signal .

In a possible implementation manner, the target power information includes first power information and second power information, the first power information carries the first power detection value, and the second power information carries the first power information. Two power detection value;

The power detection unit includes a first power detector, a filter, and a second power detector; the first power detector is connected to the optical splitter and the controller, and the filter is connected to the optical A splitter and the second power detector are connected, and the second power detector is connected with the controller;

The first power detector is configured to perform power detection on the second optical signal emitted by the optical splitter to obtain the first power detection value, and send the first power information to the controller ；

The filter is configured to linearly filter the third optical signal emitted by the optical splitter to obtain a filtered signal, and transmit the filtered signal to the second power detector;

The second power detector is configured to perform power detection on the filtered signal to obtain the second power detection value, and send the second power information to the controller.

In a possible implementation manner, the controller is used for;

Determine the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information; The optical power and the filtered optical power of the target optical signal determine the multiple first gain values.

In a possible implementation manner, the controller is used to:

Determine the multiple Raman gain values corresponding to the multiple wavelengths according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber; Multiple Raman gain values corresponding to the wavelengths, determining multiple first gain values corresponding to the multiple wavelengths;

Wherein, the multiple Raman gain values are the gains generated by the Raman effect when the light beams of the multiple wavelengths are propagated in the next cross-fiber, and the multiple Raman gain values are the same as those of the next cross-fiber. The wavelength of the optical signal transmitted in the optical fiber corresponds to one-to-one.

In a second aspect, an optical signal compensation device is provided. The device includes a compensation unit, an optical splitter, a power detection unit, and a controller; the compensation unit is connected to the optical splitter and the controller, The optical splitter is connected to the power detection unit, and the power detection unit is connected to the controller;

The optical splitter is used to split the target optical signal emitted by the compensation unit to obtain a first optical signal, a second optical signal, and a third optical signal, and transmit the first optical signal to the next optical fiber , Transmitting the second optical signal and the third optical signal to the power detection unit, the target optical signal includes light beams of multiple wavelengths, and the next optical fiber is used to transmit the optical signal output by the device ；

The power detection unit is configured to perform power detection on the second optical signal and the third optical signal respectively, and send target power information carrying the first power detection value and the second power detection value to the controller, The first power detection value is the detected optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering;

The controller is configured to determine an average compensation gain value and a plurality of optical signals transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target optical power information Multiple second gain values corresponding to the wavelength, sending a first control instruction carrying the average compensation gain value to the compensation unit, and sending a second control instruction carrying the multiple second gain values to the compensation unit, The plurality of second gain values correspond one-to-one with the wavelength of the optical signal transmitted in the next span of the optical fiber;

The compensation unit is configured to receive the fourth optical signal outputted from the previous span of the optical fiber, and the previous span of optical fiber is used to output the optical signal to the device;

The compensation unit further includes at least one optical amplifier and one or more tunable filters, the at least one optical amplifier and one or more tunable filters are connected in sequence, the at least one optical amplifier and one or more tunable filters The tuning filters are all connected to the controller;

The at least one optical amplifier is configured to receive the first control instruction sent by the controller, and amplify the received optical signal according to the average compensation gain value carried in the received first control instruction , Transmit the amplified optical signal;

The one or more tunable filters are configured to receive the second control instruction sent by the controller, and according to the multiple second gain values carried by the received second control instruction, The received optical signal is filtered, and the filtered optical signal is transmitted.

The device can determine the average compensation gain value and multiple second wavelengths corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value detected by the power detection unit through the controller. The first control instruction and the second control instruction are sent to the compensation unit, and the optical amplifier in the compensation unit amplifies the received fourth optical signal according to the average compensation gain value in the first control instruction. The tunable filter in the unit filters the received optical signal according to the multiple second gain values in the second control instruction, so that the fourth optical signal input to the compensation unit can be accurately compensated in real time.

In a possible implementation manner, the controller is used to:

Determine the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information; Determine the average compensation gain value based on the optical power and the filtered optical power of the target optical signal; determine multiple second gains corresponding to the multiple wavelengths according to multiple Raman gain values corresponding to the multiple wavelengths The multiple Raman gain values are the gains generated by the Raman effect when the light beams of the multiple wavelengths are transmitted in the next span of the optical fiber, and the multiple Raman gain values are the same as those of the next span. The wavelength of the optical signal transmitted in the optical fiber corresponds to one-to-one.

In a possible implementation manner, the controller is used to:

Determine the multiple Raman gain values corresponding to the multiple wavelengths according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber; The multiple Raman gain values corresponding to the wavelengths determine the average compensation gain value.

In a possible implementation manner, the controller is used to:

Determine the power gradient of the optical signal transmitted across the optical fiber according to the multiple Raman gain values corresponding to the multiple wavelengths; determine the multiple wavelengths according to the power gradient and the multiple wavelengths Corresponding multiple second gain values;

Wherein, the power gradient is the slope of the optical power varying with wavelength when the optical signal transmitted in the next span of optical fiber leaves the next span of optical fiber.

In a possible implementation manner, the first control instruction includes at least one first gain control instruction, each first gain control instruction carries a first sub-gain value, and the at least one first gain control instruction is related to the first gain control instruction. The at least one optical amplifier has a one-to-one correspondence, and the sum of at least one first sub-gain value carried by the at least one first gain control instruction is equal to the average compensation gain value;

Each optical amplifier is used to receive a corresponding first gain control instruction sent by the controller, and amplify the received optical signal according to the first sub-gain value carried by the received corresponding first gain control instruction , Transmit the amplified light signal.

In a possible implementation manner, the one tunable filter is located at the input end or the output end of any one of the at least one optical amplifier;

The one tunable filter is configured to receive the second control instruction sent by the controller, and perform an adjustment to the received optical signal according to the multiple second gain values carried by the second control instruction Perform filtering and output the filtered optical signal.

In a possible implementation manner, each tunable filter of the plurality of tunable filters is located at the input end or output end of any one of the at least one optical amplifier, or located at other tunable filters. The output terminal or output terminal of the device.

In a possible implementation manner, the second control instruction includes a plurality of second gain control instructions, and the number of the plurality of second gain control instructions is equal to the sum of the number of the plurality of tunable filters, so The plurality of second gain control commands correspond to the plurality of tunable filters in a one-to-one correspondence;

Each second gain control instruction carries a set of second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next cross-fiber, and the multiple wavelengths and the set of second sub-gain values A one-to-one correspondence of a plurality of second sub-gain values;

The sum of the multiple second sub-gain values corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength;

Each tunable filter of the plurality of tunable filters is configured to receive a corresponding second gain control instruction sent by the controller, according to a group of the received corresponding second gain control instructions The second sub-gain value filters the received optical signal and transmits the filtered optical signal.

In a possible implementation manner, the one or more tunable filters include a first tunable filter, and the first tunable filter serves as an output terminal of the compensation unit.

In a possible implementation manner, within the wavelength range of the optical signal transmitted in each optical amplifier, the spectral shape of the optical signal output by each of the one or more tunable filters is uniform. It is linear or quasi-linear.

In a possible implementation manner, the optical power gradient is within an adjustable optical power gradient range of each of the one or more tunable filters, and the one or more tunable filters The adjustment speed of each tunable filter to the optical signal in the tunable filter is at least microsecond level.

In a possible implementation manner, each of the one or more tunable filters has a sinusoidal filtering characteristic, and the half-period of the sinusoidal filtering characteristic is greater than or equal to that which each optical amplifier can handle. The wavelength range of the optical signal.

In a third aspect, an optical signal compensation method is provided, and the method includes:

Acquire the first optical signal, the second optical signal, and the third optical signal; perform power detection on the second optical signal to obtain the optical power of the target optical signal, and perform power detection on the third optical signal to Obtain the filtered optical power of the target optical signal; according to the optical power of the target optical signal and the filtered optical power of the target optical signal, determine the wavelength corresponding to the multiple wavelengths of the optical signal transmitted in the next optical fiber. A first gain value; according to the plurality of first gain values, amplify the fourth optical signal output from the previous span of the optical fiber to obtain a fifth optical signal;

Wherein, the first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal output from the previous optical fiber, the first optical signal is transmitted in the next optical fiber, and the target The optical signal includes light beams of multiple wavelengths, and the multiple first gain values correspond one-to-one with the wavelength of the optical signal transmitted in the next cross-fiber.

In a possible implementation manner, according to the optical power of the target optical signal and the filtered optical power of the target optical signal, determine the wavelength corresponding to the multiple wavelengths of the optical signal transmitted in the next optical fiber The multiple first gain values include:

The multiple Raman gain values corresponding to the multiple wavelengths are determined according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next cross-fiber. The Mann gain value is the gain generated by the Raman effect when the light beams of the multiple wavelengths are transmitted in the next span of the optical fiber, and the multiple Raman gain values are compared with the optical signal transmitted in the next span of the optical fiber. One to one wavelength correspondence;

According to the multiple Raman gain values corresponding to the multiple wavelengths, multiple first gain values corresponding to the multiple wavelengths are determined.

In a possible implementation manner, the performing power detection on the second optical signal to obtain the optical power of the target optical signal includes:

Perform power detection on the second optical signal to obtain a first power detection value, where the first power detection value is the detected optical power of the second optical signal; based on the first power detection value, determine The optical power of the target optical signal.

In a possible implementation manner, the performing power detection on the third optical signal to obtain the filtered optical power of the target optical signal includes:

Filtering the third optical signal to obtain a filtered signal; performing power detection on the filtered signal to obtain a second power detection value, where the second power detection value is the filtered signal of the detected third optical signal Optical power; based on the second power detection value, determine the filtered optical power of the target optical signal.

In a fourth aspect, an optical signal compensation method is provided, and the method includes:

Acquire the first optical signal, the second optical signal, and the third optical signal; perform power detection on the second optical signal to obtain the optical power of the target optical signal, and perform power detection on the third optical signal to Obtain the filtered optical power of the target optical signal; according to the optical power of the target optical signal and the filtered optical power of the target optical signal, determine the average compensation gain value and the amount of the optical signal transmitted in the next optical fiber. Multiple second gain values corresponding to each wavelength; according to the average compensation gain value, the fourth optical signal output across the last optical fiber is compensated to obtain the sixth optical signal; according to the multiple second gain values, Filtering the sixth optical signal to obtain a fifth optical signal;

Wherein, the first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal, the first optical signal is transmitted in the next span of the optical fiber, and the target optical signal includes light beams of multiple wavelengths, The plurality of second gain values correspond one-to-one with the wavelength of the optical signal transmitted in the next span of the optical fiber.

In a possible implementation manner, the average compensation gain value and the value of the optical signal transmitted in the next optical fiber are determined according to the optical power of the target optical signal and the filtered optical power of the target optical signal. The multiple second gain values corresponding to multiple wavelengths include:

Based on the first power detection value and the second power detection value, determine the optical power of the target optical signal and the filtered optical power of the target optical signal; filter according to the optical power of the target optical signal and the target optical signal Determining the average compensation gain value after the optical power; determining multiple second gain values corresponding to the multiple wavelengths according to multiple Raman gain values corresponding to the multiple wavelengths;

Wherein, the first power detection value is the detected optical power of the second optical signal, the second power detection value is the detected optical power of the third optical signal after filtering, and the plurality of The Raman gain value is the gain generated by the Raman effect when the light beams of the multiple wavelengths are transmitted in the next optical fiber, and the multiple Raman gain values are the same as the optical signal transmitted in the next optical fiber. The wavelengths correspond to each other.

In a possible implementation manner, the determining the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal includes:

According to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next cross-fiber, multiple Raman gain values corresponding to the multiple wavelengths are determined, and according to the multiple The multiple Raman gain values corresponding to the wavelengths determine the average compensation gain value.

In a possible implementation manner, the determining, according to the multiple Raman gain values corresponding to the multiple wavelengths, the multiple second gain values corresponding to the multiple wavelengths includes:

In a possible implementation manner, the method further includes:

Perform multi-level compensation on the fourth optical signal, each level of compensation process corresponds to a first sub-gain value or a set of second sub-gain values, and the sum of at least one first sub-gain value corresponding to the multi-level compensation process is equal to The average compensation gain value, a set of second sub-gain values includes multiple second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next cross-fiber, and the multiple wavelengths are related to the multiple second sub-gain values. The gain values correspond one-to-one, and the sum of at least one second sub-gain value corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength;

Wherein, in any one stage of the multi-stage compensation process, when the compensation process corresponds to a first sub-gain value, the compensation is performed according to the first sub-gain value corresponding to the compensation process The optical signal in the process is amplified; when the compensation process corresponds to a set of second sub-gain values, the optical signal in the compensation process is filtered according to the set of second sub-gain values corresponding to the compensation process .

In a fifth aspect, an optical signal compensation device is provided. The optical signal compensation device includes a processor and a memory, and at least one instruction is stored in the memory. The instruction is loaded and executed by the processor to implement the optical signal compensation method described above. Action performed.

In a sixth aspect, a computer-readable storage medium is provided, and at least one instruction is stored in the storage medium, and the instruction is loaded and executed by a processor to implement the operations performed by the above optical signal compensation method.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

FIG. 1 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a wavelength division multiplexing system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of the normalization of a Raman gain coefficient provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a compensation unit provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application;

FIG. 8 is a flowchart of an optical signal compensation method provided by an embodiment of the present application;

FIG. 9 is a flowchart of an optical signal compensation method provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

FIG. 3 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application. Referring to FIG. 3, the device 300 includes an optical amplifier 301, an optical splitter 302, a power detection unit 303, and a controller 304; the optical amplifier 301 and The optical splitter 302 and the controller 304 are connected, the optical splitter 302 is connected to the power detection unit 303, and the power detection unit 303 is connected to the controller 304;

The optical splitter 302 is used to split the target optical signal emitted by the optical amplifier 301 to obtain a first optical signal, a second optical signal and a third optical signal, and transmit the first optical signal to the next optical fiber, Transmit the second optical signal and the third optical signal to the power detection unit 303, the target optical signal includes light beams of multiple wavelengths, and the next optical fiber is used to transmit the optical signal output by the device 300;

The power detection unit 303 is configured to perform power detection on the second optical signal and the third optical signal, and send target power information carrying the first power detection value and the second power detection value to the controller 304. A power detection value is the detected optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering;

The controller 304 is configured to determine multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target power information Send a target control instruction to the optical amplifier 301, where the target control instruction includes the multiple first gain values, and the multiple first gain values have a one-to-one correspondence with the wavelength of the optical signal transmitted in the next optical fiber;

The optical amplifier 301 is used to receive the fourth optical signal output across the last optical fiber, and amplify the fourth optical signal according to the multiple first gain values in the target control command to obtain the fifth optical signal, The optical splitter 302 transmits the fifth optical signal, and the last optical fiber is used to output the optical signal to the device 300.

Wherein, the target optical signal includes light beams of multiple wavelengths, for example, the target optical signal includes N light beams of different wavelengths, and N is an integer equal to or greater than 2, that is, the target optical signal may be a wavelength division multiplexed signal. It should be noted that the optical signals passing through the device 300 are all wavelength division multiplexed signals, for example, the fourth optical signal is also a wavelength division multiplexed signal. The embodiment of the present application does not specifically limit the wavelength of each optical signal passing through the device 300.

The next-span fiber can transmit light beams within a preset wavelength range, the preset wavelength range can include multiple wavelengths, and the multiple wavelengths of the optical signal transmitted in the next-span fiber are wavelengths within the preset wavelength range , Or in other words, a light beam of any wavelength in the preset wavelength range can be transmitted across the next optical fiber. The preset wavelength range may be the working wavelength range of the optical amplifier 301. The embodiment of the application does not specify the preset wavelength range. limited.

Each first gain value in the plurality of first gain values corresponds to a wavelength of the optical signal transmitted in the next optical fiber, and the plurality of first gain values may be different. For example, wavelength 1 corresponds to the first gain value 1. The wavelength 2 corresponds to the first gain value 2, and the first gain value 1 is not equal to the first gain value 2. Of course, in a possible implementation manner, part of the first gain values or all of the first gain values in the plurality of first gain values may also be the same.

The target power information includes first power information and second power information, the first power information carries the first power detection value, and the second power information carries the second power detection value. In a possible implementation manner, the first power information may carry a first power detection value and a non-filtering flag, where the non-filtering flag is used to indicate that the first power detection value carried in the first power information has not been filtered. The power detection value of the optical signal. The second power information may carry a second power detection value and a filtering identifier, where the filtering identifier is used to indicate that the second power detection value carried in the second power information is the power detection value of the optical signal that has undergone filtering processing.

The target control instruction may also include a wavelength identifier of the wavelength corresponding to each first gain value, so that each first gain value in the target control instruction may correspond to a wavelength, and a wavelength identifier of a wavelength is used to indicate the wavelength. The identifier can be the length value of the wavelength.

The fourth optical signal is the optical signal received by the device 300 at the current moment, and the fifth optical signal is also the optical signal after the device 300 compensates for the fourth optical signal. Since the fifth optical signal is an optical signal compensated by the fourth optical signal, when the optical splitter 302 splits the fifth optical signal, it transmits a part of the fifth optical signal to the next optical fiber, and this part of the fifth optical signal is It can be transmitted across the next optical fiber, and affected by the Raman effect, this part of the fifth optical signal can be restored to the fourth optical signal.

The connection structure of the device 300 can be as follows: the optical input interface of the optical amplifier 301 is connected to the previous span optical fiber, the optical output interface of the optical amplifier 301 is connected to the optical input interface of the optical splitter 302, and the first optical output of the optical splitter 302 The interface is connected to the optical input interface of the next span of optical fiber of the device 300, and the optical output interface of the next span of optical fiber is connected to the target device. The target device is not shown in FIG. Any device that processes the optical signal transmitted in the optical signal, for example, another optical signal compensation device; the second optical output interface of the optical splitter 302 is connected to the first optical input interface of the power detection unit 303, and the optical splitter 302 The third optical output interface is connected to the second optical input interface of the power detection unit 303, the data output interface of the power detection unit 303 is connected to the data input interface of the controller 304, and the data output interface of the controller 304 is connected to the data of the optical amplifier 301. Input interface connection. Among them, the optical amplifier 301 and the optical splitter 302 and between the optical splitter 302 and the power detector can be connected by optical fibers or optical waveguides. And the connection mode between the optical splitter 302 and the power detection unit 303 is not specifically limited, that is, the transmission channel used for transmitting the optical signal inside the device 300 is not specifically limited.

The working principle of the device 300 may be: the optical output interface of the optical amplifier 301 transmits the target optical signal to the optical input interface of the optical splitter 302, and the optical splitter 302 can divide the target optical signal received by the optical input interface into three Part of the optical signals are the first optical signal, the second optical signal, and the third optical signal. The first optical signal is transmitted to the next optical fiber through the first optical output interface of the optical splitter 302, so that the first optical signal is below the optical fiber. Transmitted across an optical fiber, the second optical signal is transmitted to the first optical input interface of the power detection unit 303 through the second optical output interface of the optical splitter 302, and the second optical signal is transmitted to the power detection unit 303 through the third optical output interface of the optical splitter 302 The second optical input interface emits a third optical signal; the power detection unit 303 can respectively detect the second optical signal received by the first optical input interface and the third optical signal received by the second optical input interface to obtain the first The power detection value and the second power detection value, and send the target power information to the data input interface of the controller 304 through the data output interface of the power detection unit 303; the controller 304 determines the target power information according to the target power information received by the data input interface The optical amplifier 301 sends a target control instruction to the data input interface of the optical amplifier 301 through the data output interface of the controller 304; the optical amplifier 301 according to multiple first gain values in the target control instruction received from the data input interface, Amplify the fourth optical signal output across the last optical fiber to obtain the fifth optical signal, and transmit the fifth optical signal to the optical splitter 302 through the optical output interface of the optical amplifier 301.

In order to further illustrate the specific structure of each unit in the device 300 and the working principle of each unit, in conjunction with Figure 3, and through the following four parts 3.1-3.4, each unit in the device 300 will be introduced in detail.

3.1 Optical splitter 302

The optical input interface of the optical splitter 302 is used to receive the target optical signal emitted by the optical amplifier 301. The optical splitter 302 can split the received target optical signal based on the target splitting ratio to obtain the first optical signal and the first optical signal. The second optical signal and the third optical signal.

Wherein, the first optical signal may be most of the optical signals in the target optical signal, and the second optical signal and the third optical signal may be a small part of the optical signals in the target optical signal, so as to ensure that the target optical signal is large in the target optical signal. Part of the optical signal can be transmitted in the next optical fiber, and the target splitting ratio may be 9:0.5:0.5 or 9.5:0.25:0.25. The embodiment of the present application does not specifically limit the target splitting ratio.

3.2. Power detection unit 303

The power detection unit 303 may use multiple power detectors to detect the second optical signal and the third optical signal respectively. In a possible implementation manner, the power detection unit 303 includes a first power detector 3031 and a filter. 3032 and a second power detector 3033; the first power detector 3031 is connected to the optical splitter 302 and the controller 304, and the filter 3032 is connected to the optical splitter 302 and the second power detector 3033 , The second power detector 3033 is connected to the controller 304;

The first power detector 3031 is configured to perform power detection on the second optical signal emitted by the optical splitter 302 to obtain the first power detection value, and send the first power information to the controller 304;

The filter 3032 is configured to linearly filter the third optical signal emitted by the optical splitter 302 to obtain a filtered signal, and transmit the filtered signal to the second power detector 3033;

The second power detector 3033 is configured to perform power detection on the filtered signal to obtain the second power detection value, and send the second power information to the controller 304.

The connection structure of the power detection unit 303 may be as follows: the optical input interface of the first power detector 3031 is connected to the second optical output interface of the optical splitter 302, and the data output interface of the first power detector 3031 is connected to the second optical interface of the controller 304. A data input interface is connected, the optical input interface of the filter 3032 is connected to the third optical output interface of the optical splitter 302, the optical output interface of the filter 3032 is connected to the optical input interface of the second power detector 3033, and the second power detector The data output interface of 3033 is connected to the second data input interface of the controller 304. The optical input interface of the first power detector 3031 is also the first optical input interface of the power detection unit 303, the optical input interface of the filter 3032 is also the second optical input interface of the power detection unit 303, and the controller 304 Both the first data input interface and the second data input interface of the controller 304 are data input interfaces of the controller 304.

The working principle of the power detection unit 303 may be: the first power detector 3031 performs power detection on the second optical signal received by the optical input interface of the first power detector 3031 to obtain the first power detection value, and pass the first power detection value. The data output interface of the power detector 3031 sends the first power information to the first input interface of the controller 304; the filter 3032 can be based on the current filter parameters to the third optical signal received by the optical input interface of the filter 3032 Perform linear filtering to obtain a filtered signal, and transmit the filtered signal to the optical input interface of the second power detector 3033 through the optical output interface of the filter 3032; the second power detector 3033 can be used for the second power detector 3033. The filtered signal received by the optical input interface is detected to obtain the second power detection value, and the second power information is sent to the second data input interface of the controller 304 through the data output interface of the second power detector 3033.

Wherein, the first power detector 3031 performs power detection on the second optical signal emitted by the optical splitter 302, and the process of obtaining the first power detection value may be: the first power detector 3031 performs the power detection on each wavelength in the second optical signal Perform power detection of the light beam of the second optical signal to obtain the power detection value of the light beam of each wavelength in the second optical signal, and use the sum of the power detection value of the light beam of each wavelength in the second optical signal as the first power of the second optical signal Detection value. The first power detector 3031 may be a photodetector (PD).

The filter 3032 may be any filter 3032 used to linearly filter the optical signal, such as a linear filter. For any optical signal received by the filter 3032, the filter 3032 linearly filters the optical signal of any optical signal. The signal can be expressed by the following formula (1). Where M is the optical frequency of any optical signal, H(M) is the filter function of the filter 3032, a and b are the filter parameters of the filter 3032, and a and b can be the actual filtering curve of the filter 3032 by the user Set after calibration.

H(M)=a+bM (1)

The second power detector 3033 performs power detection on the filtered signal to obtain the second power detection value. The process may be: the second power detector 3033 performs power detection on the light beams of each wavelength in the filtered signal to obtain each wavelength in the filtered signal The power detection value of the beam of light, and the sum of the power detection values of the light beams of each wavelength in the filtered signal is used as the second power detection value. The second power detector 3033 may also be a photodetector.

3.3, controller 304

The controller 304 determines the multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target power information. Yes: the controller 304 determines the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information; the controller 304 determines the optical power of the target optical signal according to The optical power of the target optical signal and the filtered optical power of the target optical signal determine the multiple first gain values.

The process of the controller 304 determining the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information may be: control The controller 304 determines the proportion of the second optical signal in the target optical signal according to the target optical splitting ratio between the first optical signal, the second optical signal, and the third optical signal to obtain the first ratio. The ratio between a detected power value and the first ratio is used as the optical power of the target optical signal; the controller 304 determines the third optical signal according to the target splitting ratio between the first optical signal, the second optical signal, and the third optical signal. The proportion of the optical signal in the target optical signal obtains the second ratio, and the controller 304 uses the ratio between the second power detection value and the second ratio as the filtered optical power of the target optical signal.

The process of the controller 304 determining the plurality of first gain values according to the optical power of the target optical signal and the filtered optical power of the target optical signal may be: the controller 304 according to the optical power of the target optical signal and the optical power of the target optical signal. After filtering the optical power of the target optical signal and the length of the next span fiber, determine the multiple Raman gain values corresponding to the multiple wavelengths, and the multiple Raman gain values For the gain generated by the Raman effect during optical fiber transmission, the multiple Raman gain values correspond to the wavelength of the optical signal transmitted in the next span of the optical fiber one-to-one; The Mann gain value determines multiple first gain values corresponding to the multiple wavelengths.

In a possible implementation, for any wavelength of the optical signal transmitted in the next optical fiber, the controller 304 is based on the optical power of the target optical signal, the filtered optical power of the target optical signal, and the next optical signal. Determine the Raman gain value corresponding to any wavelength across the length of the fiber, and the Raman gain value of any wavelength is the gain generated by the Raman effect when the light beam of any wavelength is transmitted across the next fiber; control; The device 304 determines the first gain value corresponding to the arbitrary wavelength according to the Raman gain value corresponding to the arbitrary wavelength.

The process of the controller 304 determining the first gain value corresponding to any wavelength according to the Raman gain value corresponding to the arbitrary wavelength may be: the controller 304 may determine the Raman gain value corresponding to the arbitrary wavelength The negative value is determined as the first gain value corresponding to the arbitrary wavelength. For example, the Raman gain value corresponding to wavelength 1 is -5, and the Raman gain value corresponding to wavelength 2 is +3. Then, when the beam of wavelength 1 and the beam of wavelength 2 are transmitted in the next span of the fiber, due to the influence of the Raman effect, The beam of wavelength 1 may be transferred to the beam of wavelength 2 by -5 times the optical power, causing the optical power of the beam of wavelength 1 to be consumed, and the optical power of the beam of wavelength 2 is increased by +3 times. Considering this situation, before the beam of wavelength 1 and the beam of wavelength 2 enter the next cross-fiber transmission, the beam of wavelength 1 can be positively compensated in advance, and the beam of wavelength 2 can be negatively compensated in advance, that is, Expand the optical power of the beam of wavelength 1 by +5 times, and expand the optical power of the beam of wavelength 2 by -3 times to increase the optical power of the beam of wavelength 1 and reduce the optical power of the beam of wavelength 2, then follow-up compensation When the latter beam of wavelength 1 and the compensated beam of wavelength 2 are transmitted across the next fiber, due to the influence of the Raman effect, the increased optical power of the beam of wavelength 1 can be transferred to the beam of wavelength 2 to compensate for wavelength 2. The reduced optical power of the beam during negative compensation, so that the compensated wavelength 1 beam and the compensated wavelength 2 beam can be restored to the beam of wavelength 1 before compensation and the wavelength before compensation when the beam of wavelength 2 after compensation is output across the next fiber. Therefore, the controller 304 can determine the negative value of the Raman gain value corresponding to the arbitrary wavelength as the first gain value corresponding to the arbitrary wavelength.

In a possible implementation manner, when the arbitrary wavelength is the ith wavelength of the optical signal transmitted in the next cross-fiber, the controller 304 can calculate the ith wavelength by the following formula (2) Raman gain value G _R (f _i ) corresponding to each wavelength.

Among them, k is the slope after linear fitting the Raman gain coefficient of each optical frequency, f _i is the optical frequency of the beam of the i-th wavelength; L _eff is the length of the next span of the fiber; P _PD1 is the target optical signal P _PD2 is the filtered optical power of the target optical signal. The derivation process of formula (2) is as follows:

Since the power detection value of the second optical signal is the sum of the power detection values of the beams of each wavelength in the second optical signal, and the wavelength distribution in the second optical signal is the same as the wavelength distribution in the target optical signal, the target optical signal The optical power P _PD1 can be expressed by the following formula (3).

Among them, N is the number of wavelengths in the target optical signal; j is the j-th wavelength in the target optical signal, and P _j is the optical power of the beam of the j-th wavelength in the target optical signal, that is, in the second optical signal The ratio between the power detection value of the j-th wavelength beam and the first ratio.

By deriving the above formulas (1) and (3), it can be known that the filtered optical power P _{PD2 of the} target optical signal can be expressed by the following formula (4). Among them, f _j is the optical frequency of the beam of the j-th wavelength in the target optical signal, P _j corresponds to f _j , and P _j is the optical power of the optical signal with the optical frequency f _{j in the target optical signal, where the target} Each wavelength in the optical signal corresponds to an optical frequency.

A wavelength corresponding to the i-th value of Raman gain G _R (f _i), may also be represented by the following formula (5), g _Rj frequency F _i of the light as a reference light in the Raman gain coefficient of the frequency f _j, g _Ri is at a frequency f _i of the reference light in the Raman gain coefficient of the optical frequency f _i.

Fig. 4 is a schematic diagram of the normalization of Raman gain coefficient provided by an embodiment of the application. In a wavelength division multiplexing system, the difference between the optical frequency of the beam with the smallest wavelength and the optical frequency of the beam with the largest wavelength is less than 12THz, in the range of the relative optical frequency difference less than 12THz, the normalized Raman gain coefficient g _R is shown in curve 1 in Figure 4. The Raman gain coefficient g _R can be linearly simulated with a line (linear). together (curve 4 in FIG. 2), seen from the curve 2, the light of a reference frequency f _i can be expressed by the following equation (6) in the optical frequency f _j Raman gain coefficient g _Rj, where, k i.e. Is the slope of curve 2 in Figure 4.

g _Rj = k(f _j -f _i ) (6)

After controller 304 Equation (6) into equation _{(5), G R (f} i) can be simplified as the following equation (7).

in,

The controller 304 substitutes formulas (3) and (4) into formula (8), and the following formula (9) can be obtained.

The controller 304 can substitute formula (9) into formula 7, and the above formula (2) can be obtained.

It should be noted that the controller 304 may also store the first power detection value in the first power information received each time and the second power detection value in the second power information received each time. After a power detection value and a second power detection value, the controller 304 may also compare the first power detection value acquired this time with the first power detection value acquired last time, and compare the second power detection value acquired this time The value is compared with the second power detection value obtained last time. If the first power detection value obtained this time is the same as the first power detection value obtained last time, and the second power detection value obtained this time is the same as the last obtained first power detection value. The second power detection value is also the same, indicating that the optical signal output by the optical amplifier 301 at the current time is the target optical signal, that is, the optical signal passing through the optical amplifier 301 at the current time and the optical signal passing through the optical amplifier 301 at the previous time have not changed , That is, the wavelength distribution of the optical signal received in the optical amplifier 301 does not dynamically switch, and the wavelength distribution of the optical signal transmitted in the next optical fiber does not dynamically switch, and the controller 304 may not send a new signal to the optical amplifier 301. In order to avoid the optical amplifier 301 from recompensating the received optical signal according to the new target control command, it is possible to avoid the phenomenon of over-compensation.

3.4 Optical amplifier 301

The optical amplifier 301 can receive the target control instruction sent by the controller 304 through the data input interface, and receive the fourth optical signal output from the previous cross-fiber through the optical input interface of the optical amplifier 301. The optical amplifier 301 can control the target according to the received target. Command to compensate the received fourth optical signal to obtain the fifth optical signal, and transmit the fifth optical signal to the optical input interface of the optical splitter 302 through the optical output interface of the optical amplifier 301.

In a possible implementation manner, for a light beam of any wavelength in the fourth optical signal, the optical amplifier 301 can, according to the first gain value corresponding to the any wavelength in the target control instruction, determine the A light beam of any wavelength is amplified to obtain a light beam of any wavelength in the fifth optical signal.

When the optical amplifier 301 has a basic compensation gain, the optical amplifier 301 can modify the basic compensation gain value corresponding to any wavelength to the first gain value corresponding to the any wavelength, and the fourth optical signal A light beam of any wavelength is amplified. Among them, the basic compensation gain is the amplification gain for amplifying the received optical signal when the optical amplifier 301 does not receive a control command.

The optical amplifier 301 may also first amplify the light beam of any wavelength in the fourth optical signal based on the basic compensation gain value to obtain the first amplified light beam, and then according to the basic compensation gain value and the first gain corresponding to the arbitrary wavelength The difference between the values, the first amplified beam is amplified.

Alternatively, the optical amplifier 301 may first amplify the light beam of any wavelength in the fourth optical signal according to the difference between the basic compensation gain value and the first gain value corresponding to the any wavelength to obtain the second Amplify the light beam, and then amplify the second amplified light beam based on the basic compensation gain value.

After the optical amplifier 301 obtains the fifth optical signal, the fifth optical signal can be transmitted to the optical splitter 302, and the optical splitter 302 splits the fifth optical signal, and transmits the split fifth optical signal To the next span of the fiber, since the first gain value corresponding to each wavelength is the negative value of the Raman gain corresponding to any wavelength, and each light beam in the fifth optical signal is determined by the optical amplifier 301 based on the wavelength of each light beam. The light beam amplified by the corresponding first gain value can compensate for the influence of each light beam due to the Raman effect. Therefore, when the fifth optical signal is output across the next fiber, the fifth optical signal can be restored to the fourth light. Signal.

The device can determine multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value detected by the power detection unit through the controller, and provide The optical amplifier issues a target control command. Since the multiple first gain values carried by the target control command correspond to the wavelength of the optical signal transmitted in the next optical fiber, even if the fourth optical signal currently received by the optical amplifier corresponds to the target The wavelength of the light beam in the optical signal is different, that is, the wavelength of the fourth optical signal and the target optical signal are dynamically switched, and the optical amplifier can also amplify the received fourth optical signal according to the target control command to increase the fourth optical signal. Make compensation.

In addition to compensating the received optical signal according to the first gain value, the optical signal compensation device 500 can also compensate the optical signal according to the average compensation gain value and multiple second gain values, such as the implementation shown in FIG. 5 The example provides a schematic structural diagram of an optical signal compensation device. The device 500 includes a compensation unit 501, an optical splitter 502, a power detection unit 503, and a controller 504; the compensation unit 501 is connected to the optical splitter 502 and the controller 504, and the optical splitter 502 is connected to the power The detection unit 503 is connected, and the power detection unit 503 is connected to the controller 504;

The optical splitter 502 is used to split the target optical signal emitted by the compensation unit 501 to obtain a first optical signal, a second optical signal, and a third optical signal, and transmit the first optical signal to the next optical fiber, Transmit the second optical signal and the third optical signal to the power detection unit 503, the target optical signal includes light beams of multiple wavelengths, and the next optical fiber is used to transmit the optical signal output by the device 500;

The power detection unit 503 is configured to perform power detection on the second optical signal and the third optical signal, and send target power information carrying the first power detection value and the second power detection value to the controller 504. A power detection value is the detected optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering;

The controller 504 is configured to determine the average compensation gain value and the corresponding multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target optical power information A plurality of second gain values, a first control instruction carrying the average compensation gain value is sent to the compensation unit 501, a second control instruction carrying the plurality of second gain values is sent to the compensation unit 501, the plurality of second gain values The gain value corresponds to the wavelength of the optical signal transmitted in the next optical fiber in a one-to-one correspondence;

The compensation unit is used for receiving the fourth optical signal outputted by the last optical fiber, and the last optical fiber is used for outputting the optical signal to the device;

The compensation unit 501 also includes at least one optical amplifier 5011 and one or more tunable filters 5012, the at least one optical amplifier 5011 and one or more tunable filters 5012 are connected in sequence, the at least one optical amplifier 5011 and one or more A plurality of tunable filters 5012 are all connected to the controller 504;

The at least one optical amplifier 5011 is configured to receive the first control instruction sent by the controller 504, and amplify the received optical signal according to the average compensation gain value carried by the received first control instruction, and transmit and amplify After the optical signal;

The one or more tunable filters 5012 are configured to receive the second control instruction sent by the controller 504, and perform a control on the received light according to the plurality of second gain values carried by the received second control instruction. The signal is filtered, and the filtered optical signal is transmitted.

Wherein, the first control instruction may include the average compensation gain value. The second control instruction may include the multiple second gain values and the wavelength identifier of the wavelength corresponding to each second gain value, so that each second gain value in the second control instruction may correspond to one wavelength. For example, the multiple wavelengths of the optical signal transmitted in the next optical fiber are wavelength 1, wavelength 2, and wavelength 3. Wavelength 1 corresponds to the second gain value A, wavelength 2 corresponds to the second gain value B, and wavelength 3 corresponds to the second gain value A. The second gain value C corresponds.

In a possible implementation manner, the first control instruction may include at least one first gain control instruction, each first gain control instruction carries a first sub-gain value, and the at least one first gain control instruction is connected to the at least one gain control instruction. One optical amplifier has a one-to-one correspondence, and the sum of at least one first sub-gain value carried by the at least one first gain control command is equal to the average compensation gain value. When the first control instruction includes a first gain control instruction, the first sub-gain value in the first gain control instruction is also the average compensation gain value. The at least one first sub-gain value may be the same or different. For example, the average compensation gain value may be 5, the first sub-gain value may include 2 and 3, and the first sub-gain value may also include 2.5 and 2.5.

The second control instruction may include a plurality of second gain control instructions, the number of the plurality of second gain control instructions is equal to the sum of the number of the plurality of tunable filters, the plurality of second gain control instructions and the plurality of The tunable filter has a one-to-one correspondence; each second gain control instruction carries a set of second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next cross-fiber, and the multiple wavelengths correspond to the set of second sub-gain values. The multiple second sub-gain values in the sub-gain values correspond one-to-one; the sum of the multiple second sub-gain values corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength. For example, the multiple wavelengths of the optical signal transmitted in the next cross-fiber are wavelength 1, wavelength 2, and wavelength 3. Wavelength 1 corresponds to the second gain value A, and the second gain value A can be divided into the second sub-gain A1 and the first sub-gain A1. Two sub-gain A2, wavelength 2 corresponds to the second gain value B, the second gain value B can be divided into the second sub-gain B1 and the second sub-gain B2, the wavelength 3 corresponds to the second gain value C, and the second gain value C can be divided For the second sub-gain C1 and the second sub-gain C2, two sets of second gain values can be obtained: the second sub-gain A1 (corresponding to wavelength 1), the second sub-gain B1 (corresponding to the wavelength 2), and the second sub-gain C1 (corresponding to wavelength 3); second sub-gain A2 (corresponding to wavelength 1), second sub-gain B2 (corresponding to wavelength 2), and second sub-gain C2 (corresponding to wavelength 3). Wherein, a group of second sub gains corresponding to wavelength 1 includes 1 dB, 2 dB, and 3 dB, and the second gain corresponding to wavelength 1 is 6 dB. It should be noted that the multiple second sub-gain values corresponding to the same wavelength may be the same or different.

The connection structure of the device 500 may be as follows: the optical input interface of the compensation unit 501 is connected to the previous span optical fiber, the optical output interface of the compensation unit 501 is connected to the optical input interface of the optical splitter 502, and the first optical splitter 502 The optical output interface is connected to the optical input interface of the next span of optical fiber, and the optical output interface of the next optical fiber is connected to the target device; the second optical output interface of the optical splitter 502 is connected to the first optical input interface of the power detection unit 503, and the optical splitting The third optical interface of the router 502 is connected to the second optical input interface of the power detection unit 503, the data output interface of the power detection unit 503 is connected to the data input interface of the controller 504, and the first data output interface of the controller 504 is connected to the The first data input interface of the compensation unit 501 is connected, and the second data output interface of the controller 504 is connected to the second data input interface of the compensation unit 501. The first data input interface of the compensation unit 501 includes the data input interface of the at least one optical amplifier 5011, that is, the digital input interface of each optical amplifier 5011 is connected to the first data input interface of the controller 504, and the compensation unit The second data input interface of the 502 includes the data input interface of the one or more tunable filters 502, that is, the data input interface of each tunable filter 502 is connected to the second data input interface of the controller 504. The optical input interface of the compensation unit 501 is also the optical input interface of the first one of at least one optical amplifier 5011 and one or more tunable filters 5012 connected in sequence; the optical output interface of the optical input interface of the compensation unit 501 That is, it is the optical output interface of the last one of the at least one optical amplifier 5011 and one or more tunable filters 5012 connected in sequence. In addition, the compensation unit 501 and the optical splitter 502 and between the optical splitter 502 and the power detection unit 503 may be connected by optical fibers, or optical waveguides, etc. The optical signal compensation device 500 is used for transmission in the embodiment of the present application. The transmission channel of the optical signal is not specifically limited.

The working principle of the device 500 may be: the optical output interface of the compensation unit 501 transmits the target optical signal to the optical input interface of the optical splitter 502, and the optical splitter 502 can divide the target optical signal received by the optical input interface into three Some of the optical signals are the first optical signal, the second optical signal, and the third optical signal. The first optical signal is transmitted to the next optical fiber through the first optical interface of the optical splitter 502, so that the first optical signal is below Transmitted across an optical fiber, the second optical signal is transmitted to the first optical input interface of the power detection unit 503 through the second optical output interface of the optical splitter 502, and the second optical signal is transmitted to the power detection unit 503 through the third optical output interface of the optical splitter 502 The second optical input interface transmits a third optical signal; the power detection unit 503 can respectively detect the second optical signal received by the first optical input interface and the third optical signal received by the second optical input interface to obtain the first The power detection value and the second power detection value, and send target power information to the data input interface of the controller 504 through the data output interface of the power detection unit 503; the controller 504 determines the average compensation according to the target power information received by the data input interface Gain value and multiple second gain values, and send a first control instruction to the first data input interface of the compensation unit 501 through the first data output interface of the controller 504, and send a first control instruction to the compensation unit through the second data output interface of the controller 504 The second data input interface of the 501 sends a second control instruction; the first one of the at least one optical amplifier 5011 and one or more tunable filters 5012 connected in sequence in the compensation unit 501 receives the fourth transmission from the previous optical fiber Optical signal, the at least one optical amplifier 5011 amplifies the received optical signal according to the average gain in the first control command, and transmits the amplified optical signal to the optical amplifier or tunable filter connected to it; the one or more The tunable filter 5012 filters the received optical signal according to the multiple second gains in the second control command, and transmits the filtered optical signal to the optical amplifier or tunable filter connected to it, until the at least one connected in turn The last of an optical amplifier 5011 and one or more tunable filters 5012 transmits an optical signal to the optical splitter 502, in other words, the optical splitter 502 receives the optical signal for the compensation unit 501 to output to the previous span of optical fiber The fourth optical signal is a compensated optical signal.

In order to further explain the specific structure of each unit in the optical signal compensation device 500 and the working principle of each unit, in conjunction with FIG. 5, and through the following four parts 5.1-5.4, each unit in the optical signal compensation device 500 is detailed introduce.

5.1 Optical splitter 502

The optical input interface of the optical splitter 502 is used to receive the target optical signal emitted by the optical compensation unit 501. The optical splitter 502 can split the received target optical signal based on the target splitting ratio to obtain the first optical signal, The second optical signal and the third optical signal.

5.2. Power detection unit 503

The power detection unit 503 may use multiple power detectors to detect the second optical signal and the third optical signal respectively. In a possible implementation manner, the power detection unit 503 includes a first power detector 5031 and a filter. 5032 and a second power detector 5033; the first power detector 5031 is connected to the optical splitter 502 and the controller 504, and the filter 5032 is connected to the optical splitter 502 and the second power detector 5033 , The second power detector 5033 is connected to the controller 504;

The first power detector 5031 is configured to perform power detection on the second optical signal emitted by the optical splitter 502 to obtain the first power detection value, and send the first power information to the controller 504;

The filter 5032 is configured to linearly filter the third optical signal emitted by the optical splitter 502 to obtain a filtered signal, and transmit the filtered signal to the second power detector 5033;

The second power detector 5033 is configured to perform power detection on the filtered signal to obtain the second power detection value, and send the second power information to the controller 504.

The connection structure of the power detection unit 503 may be: the optical input interface of the first power detector 5031 is connected to the second optical output interface of the optical splitter 502, and the data output interface of the first power detector 5031 is connected to the second optical interface of the controller 504. A data input interface is connected, the optical input interface of the filter 5032 is connected to the third optical output interface of the optical splitter 502, the optical output interface of the filter 5032 is connected to the optical input interface of the second power detector 5033, and the second power detector The data output interface of 5033 is connected to the second data input interface of the controller 504. The optical input interface of the first power detector 5031 is also the first optical input interface of the power detection unit 503, the optical input interface of the filter 5032 is also the second optical input interface of the power detection unit 503, and the controller 504 Both the first data input interface of the controller 504 and the second data input interface of the controller 504 are data input interfaces of the controller 504.

The working principle of the power detection unit 503 may be: the first power detector 5031 performs power detection on the second optical signal received by the optical input interface of the first power detector 5031 to obtain the first power detection value, and pass the first power detection value. The data output interface of the power detector 5031 sends the first power information to the first input interface of the controller 504; the filter 5032 can be based on the current filter parameters to the third optical signal received by the optical input interface of the filter 5032 Perform linear filtering to obtain a filtered signal, and transmit the filtered signal to the optical input interface of the second power detector 5033 through the optical output interface of the filter 5032; the second power detector 5033 can be used for the second power detector 5033. The filtered signal received by the optical input interface is detected to obtain the second power detection value, and the second power information is sent to the second data input interface of the controller 504 through the data output interface of the second power detector 5033.

Wherein, the first power detector 5031 performs power detection on the second optical signal emitted by the optical splitter 502, and the process of obtaining the first power detection value may be: the first power detector 5031 performs each wavelength in the second optical signal Perform power detection of the light beam of the second optical signal to obtain the power detection value of the light beam of each wavelength in the second optical signal, and use the sum of the power detection value of the light beam of each wavelength in the second optical signal as the first power of the second optical signal Detection value. The first power detector 5031 may be a photodetector.

The filter 5032 may be any filter that performs linear filtering on the optical signal, for example, a linear filter.

The second power detector 5033 performs power detection on the filtered signal to obtain the second power detection value. The process may be: the second power detector 5033 performs power detection on the light beams of each wavelength in the filtered signal to obtain each wavelength in the filtered signal The power detection value of the beam of light, and the sum of the power detection values of the light beams of each wavelength in the filtered signal is used as the second power detection value. The second power detector 5033 may also be a photodetector.

5.3 Controller 504

The controller 504 determines the average compensation gain value and the plurality of second wavelengths corresponding to the wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target optical power information. The process of the second gain value may be: the controller 504 determines the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information ( This process is described in section 3.3); the controller 504 determines the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal; the controller 504 determines the average compensation gain value according to the multiple wavelengths corresponding to the multiple wavelengths. A Raman gain value to determine a plurality of second gain values corresponding to the plurality of wavelengths, and the plurality of Raman gain values are the gains generated by the Raman effect when light beams of the plurality of wavelengths propagate across the next optical fiber , The multiple Raman gain values have a one-to-one correspondence with the wavelength of the optical signal transmitted in the next span of the optical fiber.

The process of the controller 504 determining the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal may be: the controller 504 according to the optical power of the target optical signal, the target optical signal The optical power after signal filtering and the length of the next cross-fiber determine multiple Raman gain values corresponding to the multiple wavelengths; the controller 504 determines the average compensation according to the multiple Raman gain values corresponding to the multiple wavelengths The gain value.

The controller 504 determines the multiple Raman gain values corresponding to the multiple wavelengths according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber. 304 According to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber, the process of determining the multiple Raman gain values corresponding to the multiple wavelengths is the same. Here, the present application The embodiment does not perform the process in which the controller 504 determines the multiple Raman gain values corresponding to the multiple wavelengths according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber. Go into details.

The controller 504 determines the average compensation gain value according to the multiple Raman gain values corresponding to the multiple wavelengths. The controller 504 can average the multiple Raman gain values corresponding to the multiple wavelengths to obtain the average value. For the Raman gain value, the negative value of the average Raman gain value is used as the average compensation gain value.

In a possible implementation manner, the controller 504 determines the multiple second gain values corresponding to the multiple wavelengths according to the multiple Raman gain values corresponding to the multiple wavelengths, which may include the following steps 1 to 2 to fulfill.

Step 1. The controller 504 determines the power gradient of the optical signal transmitted in the next optical fiber according to the multiple Raman gain values corresponding to the multiple wavelengths, and the power gradient is the optical signal transmitted in the next optical fiber. The slope of the optical power versus wavelength when leaving the next span of fiber.

Each Raman gain value can reflect the optical power change caused by the Raman effect when the beam of the wavelength corresponding to each Raman gain is transmitted across the fiber, and the multiple Raman gain values corresponding to multiple wavelengths change with the wavelength. The slope of is opposite to the power slope, and the controller 504 can use the negative value of the slope of the multiple Raman gain values corresponding to the multiple wavelengths with the wavelength as the power slope.

Step 2. The controller 504 determines multiple second gain values corresponding to the multiple wavelengths of the multiple wavelengths according to the power gradient and the multiple wavelengths.

For any one of the multiple wavelengths, the controller 504 can determine the second gain value corresponding to the any one of the wavelengths based on the any one of the wavelengths, the center wavelength of the optical amplifier 5011, and the power gradient, where the any one of the wavelengths The second gain value corresponding to a wavelength is the product of the power gradient and the target wavelength difference. The target wavelength difference is the difference between the center wavelength and any one of the wavelengths. The center wavelength may be the optical amplifier. The center wavelength in the working wavelength range of 5011. For example, if the working wavelength range of the optical amplifier 5011 is 1530 nm to 1560 nm, then the center wavelength of the working wavelength range is 1545 nm. It should be noted that the working wavelength range of the optical amplifier 5011 includes the wavelength of any light beam that can be transmitted by the optical amplifier 5011, that is, the wavelength range of the optical signal transmitted in the optical amplifier 5011.

It should be noted that when the compensation unit 501 only includes one optical amplifier 5011 and one tunable filter 5012, the controller directly sends the first control instruction to the one optical amplifier 5011, and to the one tunable filter 5012. Send the second control instruction. For example, the compensation unit 501 in FIG. 5.

When the compensation unit 501 includes a plurality of optical amplifiers 5011, the controller 504 may also divide the average compensation gain value into a plurality of first sub-gain values according to the number of the plurality of optical amplifiers 5011, and each first sub-gain The value corresponds to an optical amplifier, and a first gain control command is sent to each optical amplifier 5011 in the compensation unit 501. A first gain control command includes a first sub-gain value, that is, each first gain control The instruction corresponds to an optical amplifier 5011. For example, the compensation unit 501A, the compensation unit 501B, and the optical amplifier 5011 in the compensation unit 501D in FIG. 6, where FIG. 6 is a schematic structural diagram of a compensation unit provided by an embodiment of the present application.

When the compensation unit 501 includes a plurality of tunable filters 5012, the controller 504 may also divide the second gain value corresponding to each wavelength into a multiple corresponding to each wavelength according to the number of the plurality of tunable filters 5012. Second sub-gain values, and multiple second sub-gain values corresponding to each wavelength are respectively placed in a set of second sub-gain values, so that each set of second sub-gain values can include multiple second sub-gains. Each group of second sub-gain values has a one-to-one correspondence with the plurality of wavelengths, and each group of second sub-gain values can correspond to one tunable filter 5012. The controller 504 may also send a corresponding second gain control instruction to each tunable filter 502, where each second gain control instruction carries a group of second sub-gain values. It is understandable that a second gain control command corresponds to a tunable filter 5012, and a second gain control command can carry a set of second sub-gain values and each second sub-gain in a set of second word gain values. The wavelength identifier of the wavelength corresponding to the value, and each second sub-gain value corresponds to a wavelength identifier.

It should be noted that the controller 504 may also store the first power detection value in the first power information received each time and the second power detection value in the second power information received each time. After a power detection value and a second power detection value, the controller 504 may also compare the first power detection value acquired this time with the first power detection value acquired last time, and compare the second power detection value acquired this time The value is compared with the second power detection value obtained last time. If the first power detection value obtained this time is the same as the first power detection value obtained last time, and the second power detection value obtained this time is the same as the last obtained first power detection value. The second power detection value is also the same, indicating that the optical signal output by the compensation unit 501 at the current time is the target optical signal, that is, the optical signal output by the compensation unit 501 at the current time and the optical signal output by the compensation unit 501 at the previous time have not changed , That is, the wavelength distribution of the optical signal received by the compensation unit 501 does not dynamically switch, and the wavelength distribution of the output optical signal does not dynamically change, the wavelength distribution of the optical signal transmitted in the next span of the optical fiber is also not dynamic Switch, the controller 504 may not send the new first control instruction and the new second control instruction to the compensation unit 501, so as to prevent the compensation unit 501 from responding to the new first control instruction and the new second control instruction. The optical signal is compensated again, so the phenomenon of over-compensation can be avoided.

5.4. Compensation unit 501

In a possible implementation, the compensation unit 501 includes an optical amplifier 5011 and a tunable filter 5012, the optical amplifier 5011 is connected to the tunable filter 5012, and the optical amplifier 5011 and the tunable filter 5012 are both connected. Connected to the controller 504; the optical amplifier 5011 is used to receive the first control instruction sent by the controller 504, and according to the average compensation gain value carried by the received first control instruction, amplify the received optical signal and transmit Amplified optical signal; the tunable filter 5012 is used to receive the second control instruction sent by the controller 504, according to the plurality of second gain values carried by the second control instruction, to the received light The signal is filtered, and the filtered optical signal is transmitted.

Wherein, the tunable filter 5012 may be located at the input end or the output end of the optical amplifier 5011. When the tunable filter is used as the input end of the compensation unit 501, the optical input interface of the tunable filter 5012 is connected to the last span fiber, and the optical output interface of the tunable filter 5012 is connected to the input of the optical amplifier 5011. The optical interface is connected. The optical output interface of the optical amplifier 5011 is connected to the optical input interface of the optical splitter 502. At this time, the tunable filter 5012 is located at the input end of the optical amplifier 5011. When the tunable filter 5012 is used as the output end of the compensation unit 501, the optical input interface of the optical amplifier 5011 is connected to the previous span fiber, and the optical output interface of the optical amplifier 5011 is connected to the input optical fiber of the tunable filter 5012. Interface connection. The optical output interface of the tunable filter 5011 is connected to the optical input interface of the optical splitter 502. At this time, the tunable filter 5012 is located at the output end of the optical amplifier 5011, such as the tunable filter in FIG. 5器5012.

In a possible implementation, the compensation unit 501 includes at least one optical amplifier 5011, where each optical amplifier is used to receive a corresponding first gain control instruction sent by the controller 504, and according to the received corresponding The first sub-gain value carried by the first gain control instruction amplifies the received optical signal, and transmits the amplified optical signal.

When the compensation unit includes multiple optical amplifiers 5011 and one tunable filter 5012, the tunable filter may be located at the output end of any one of the multiple optical amplifiers 5011. For example, the connection structure in the compensation unit 501 is: tunable filter 5012-optical amplifier 5011-optical amplifier 5011, and for another example, the connection structure in the compensation unit 501 is: optical amplifier 5011-tunable filter 5012-optical amplifier 5011, For another example, the connection structure in the compensation unit 501 is: optical amplifier 5011-optical amplifier 5011-tunable filter 5012, where "-" is used to indicate the connection relationship.

In a possible implementation, when the compensation unit 501 includes a plurality of tunable filters 5012, each tunable filter 5012 of the plurality of tunable filters 5012 is located in any one of the at least one optical amplifier 5011. The input terminal or output terminal of the optical amplifier 5011 may be located at the output terminal or output terminal of other tunable filters 5012.

When any tunable filter 5012 of the plurality of tunable filters 5012 is connected to an optical amplifier 5011, if the optical output interface of any tunable filter 5012 is connected to the optical input interface of an optical amplifier 5011, then The arbitrary tunable filter 5012 is located at the input end of an optical amplifier 5011, such as the second tunable filter in the compensation unit 501B in FIG. 6. When the any tunable filter 5012 is connected to an optical amplifier 5011, if the optical input interface of the any tunable filter 5012 is connected to the optical output interface of the optical amplifier 5011, then the any tunable filter 5012 Located at the output end of an optical amplifier 5011, such as the last tunable filter 5012 in the compensation unit 501A in FIG. 6.

When any one tunable filter 5012 is connected to another tunable filter 5012, the any one tunable filter 5012 can be located at the output end or the output end of the other tunable filter 5012. When any tunable filter 5012 is connected to an optical amplifier 5011, another tunable filter 5012, if the optical input interface of any tunable filter 5012 is connected to the optical output interface of another tunable filter 5012 , The optical output interface of any tunable filter 5012 is connected to the optical input interface of an optical amplifier 5011. At this time, the any tunable filter 5012 is located at the output end of another tunable filter 5012, as shown in Figure 6 The second tunable filter 5012 in the compensation unit 501B. When the arbitrary tunable filter 5012 is connected to an optical amplifier 5011 and another tunable filter 5012, if the optical input interface of any tunable filter 5012 is connected to the optical output interface of an optical amplifier 5011, the arbitrary The light output interface of a tunable filter 5012 is connected to the light input interface of another tunable filter 5012. At this time, any tunable filter 5012 is located at the output and input of another tunable filter 5012, such as a compensation unit The connection structure of 501 can be an optical amplifier-any tunable filter-another tunable filter.

In a possible implementation manner, the any one tunable filter 5012 can also be connected to two optical amplifiers 5011. At this time, the any one tunable filter 5012 is located at the output end of the optical amplifier 5011 and is also located at the output end of the optical amplifier 5011. The input end of another optical amplifier 5011 is, for example, the first tunable filter 5012 in the compensation unit 501A of FIG. 6.

In a possible implementation, the any one tunable filter 5012 can also be connected to two other tunable filters 5012. At this time, the any one tunable filter 5012 is located at the output of the other tunable filter 5012. At the same time, it is also located at the input end of another tunable filter 5012, such as the second tunable filter 5012 in the compensation unit 501C in FIG. 6.

In a possible implementation manner, the one or more tunable filters 5012 include a first tunable filter, and the first tunable filter is used as an output terminal of the compensation unit 501. Wherein, the optical output interface of the first tunable filter is also the optical output interface of the compensation unit 501, the optical output interface of the first tunable filter is connected to the optical input interface of the optical splitter 502, and the first tunable filter The optical input interface of the tunable filter is connected to a tunable filter 5012 or an optical output interface of an optical amplifier 5011. For example, the tunable filter 5012 in the compensation unit 501D in FIG. The emitted optical signal is also the optical signal compensated by the compensation unit 501.

When the compensation unit 501 includes a plurality of tunable filters 5012, each tunable filter 5012 of the plurality of tunable filters 5012 is used to receive a corresponding second gain control instruction sent by the controller 504, according to A set of second sub-gain values in a corresponding second gain control instruction received are filtered on the received optical signal, and the filtered optical signal is transmitted. For example, the compensation units 501A-50C in FIG. 6. For any one tunable filter 5012 of the plurality of tunable filters 5012, the any one tunable filter may be based on a second sub-gain corresponding to each wavelength in a received second gain control command Value, filter the light beam of each wavelength in the received optical signal to obtain the filtered optical signal.

Based on the above description of the various structures of the compensation unit 501, the structure of the compensation unit 501 is summarized as follows: the compensation unit 501 includes a plurality of sub-units, the plurality of sub-units are connected in sequence, and the multiple sub-units are all connected with the controller 504 in sequence Connect the first sub-unit of the plurality of sub-units to the previous span of the optical fiber, and the last sub-unit to connect to the optical splitter 502; the first sub-unit of the plurality of sub-units is the optical amplifier 5011, and among the multiple sub-units The second subunit is a tunable filter 5012, and the third subunit of the multiple subunits is an optical amplifier 5011 or a tunable filter; wherein, the first subunit is any one of the multiple subunits. A subunit, the second subunit is any subunit of the plurality of subunits except the first subunit, and the third subunit is an optional unit of the plurality of subunits, with or without, when When the multiple subunits include a third subunit, the third subunit is any subunit of the multiple subunits except the first subunit and the second subunit.

It should be noted that within the wavelength range of the optical signal transmitted in each optical amplifier 5011, the spectral shape of the optical signal output by each of the one or more tunable filters 5012 is linear. Or quasi-linear, so that each tunable filter 5012 can linearly filter the received optical signal.

Each tunable filter 5012 has a sinusoidal filtering characteristic, and the half-period of the sinusoidal filtering characteristic is greater than or equal to the wavelength range of the optical signal that each optical amplifier 5011 can handle, so that each tunable filter 5012 can be used for any optical amplifier. The optical signal output by the 5011 is filtered. The adjustment time of each tunable filter 5012 to the optical signal is at least on the order of microseconds, so that each tunable filter 5012 can quickly filter the received optical signal to reduce the transmission delay of the optical signal. Each tunable filter 5012 can be implemented based on a filter with first-order sinusoidal filtering characteristics, such as a filter with a Mach-Zehnder Interferometer (MZI) structure or a Fabry-Perot interferometer (Fabry-Zehnder Interferometer, MZI) filter. A filter with a Perot Interferometer (FPI) structure, for example, the tunable filter 5012 may be implemented based on an optical waveguide of an MZI structure, or a thin film filter based on an FPI structure.

And in order that each tunable filter 5012 can filter the received optical signal according to the second sub-gain in the second gain control command, the above-mentioned optical power gradient can be adjusted in each tunable filter 5012. Within the tilt range of the optical power. That is, each tunable filter 5012 can adjust the power gradient of the optical signal. Among them, the optical power gradient range adjusted by each tunable filter 5012 can be [-5dB, +5dB].

FIG. 7 is a schematic structural diagram of an optical signal compensation device provided by an embodiment of the present application. The optical signal compensation device 700 includes relatively large differences due to different configurations or performance, and may include one or more processors 701 and one or More than one memory 702, wherein the memory 202 stores at least one instruction, and the at least one instruction is loaded and executed by the processor 701 to implement the methods provided in the following method embodiments. Of course, the optical signal compensation 700 may also have components such as a wired or wireless network interface, a keyboard, and an input/output interface for input and output. The optical signal compensation device 700 may also include other components for implementing device functions. Do repeat.

In an exemplary embodiment, there is also provided a computer-readable storage medium, such as a memory including instructions, which may be executed by a processor in a terminal to complete the optical signal compensation method in the following embodiments. For example, the computer-readable storage medium may be read-only memory (ROM), random access memory (RAM), compact disc read-only memory (CD-ROM), Magnetic tapes, floppy disks and optical data storage devices, etc.

In order to further illustrate the process of the optical signal compensation device 300 shown in FIG. 3 for compensating the optical signal, refer to the flowchart of an optical signal compensation method provided by an embodiment of the present application shown in FIG. 8, which specifically includes:

801. The optical signal compensation device 300 obtains a first optical signal, a second optical signal, and a third optical signal. The first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal, and the first optical signal In the next span of the optical fiber, the target optical signal includes light beams of multiple wavelengths.

This step 801 can be implemented by the optical splitter 302 in the optical signal compensation device 500. The process of splitting the target optical signal by the optical splitter 302 has been described in 3.1. Step 801 will not be described in detail.

802. The optical signal compensation device 300 obtains the optical power of the target optical signal from the second optical signal.

The first power detector 3031 in the optical signal compensation device 300 can perform power detection on the second optical signal, and the controller 304 in the optical signal compensation device 300 obtains the target light according to the detection result output by the first power detector 3031. The optical power of the signal. In a possible implementation manner, this step 802 may be implemented by the process shown in the following steps 8021-8022.

Step 8021, the first power detector 3031 performs power detection on the second optical signal to obtain a first power detection value, where the first power detection value is the detected optical power of the second optical signal.

The process shown in this step 8021 is described in 3.2 above. Here, the embodiment of the present application does not repeat this step 8021.

Step 8022, the controller 304 determines the optical power of the target optical signal based on the first power detection value.

The process shown in this step 8022 is described in Section 3.3 above. Here, the embodiment of the present application does not repeat this step 8022.

803. The optical signal compensation device 300 performs power detection on the third optical signal to obtain filtered optical power of the target optical signal.

The second power detector 3033 in the optical signal compensation device 300 can perform power detection on the filtered signal of the third optical signal, and the controller 304 in the optical signal compensation device 300 can detect the output of the second power detector 3033 according to the output of the second power detector 3033. Obtain the filtered optical power of the target optical signal. In a possible implementation manner, this step 803 can be implemented by the process shown in the following steps 8031-8033.

Step 8031, the filter 3032 filters the third optical signal to obtain a filtered signal.

The process shown in this step 8031 is described in 3.2 above. Here, the embodiment of the present application does not repeat this step 8031.

Step 8032, the second power detector 3033 performs power detection on the filtered signal to obtain a second power detection value, where the second power detection value is the detected optical power of the third optical signal after filtering.

The process shown in this step 8032 is described in 3.2 above. Here, this embodiment of the present application will not repeat this step 8032.

Step 8033: The controller 304 determines the filtered optical power of the target optical signal based on the second power detection value.

The process shown in this step 8033 is described in the preceding paragraph 3.3. Here, the embodiment of the present application does not repeat this step 8033.

It should be noted that the optical signal compensation device 300 may also perform step 803 first, and then step 802, or perform steps 802 and 803 at the same time. The embodiment of the present application does not specifically limit the execution order of step 802 and step 803.

804. The optical signal compensation device 300 determines multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the optical power of the target optical signal and the filtered optical power of the target optical signal. The plurality of first gain values correspond one-to-one with the wavelength of the optical signal transmitted in the next span of the optical fiber.

This step 804 can be executed by the controller 304 of the optical signal compensation device 300. In a possible implementation manner, the process shown in this step 804 may be: for any wavelength of the optical signal transmitted in the next optical fiber, the controller 304 according to the optical power of the target optical signal, the target optical signal The optical power after signal filtering and the length of the next span fiber are used to determine the Raman gain value corresponding to the arbitrary wavelength. The gain value generated by the effect; the controller 304 determines the first gain value corresponding to any wavelength according to the Raman gain value.

805. The optical signal compensation device 300 amplifies the fourth optical signal output across the last optical fiber according to the plurality of first gain values to obtain a fifth optical signal.

This step 805 may be performed by the optical amplifier 301 in the optical signal compensation device 300. For a light beam of any wavelength in the fourth optical signal, the optical amplifier 301 can amplify the light beam of any wavelength in the fourth optical signal based on the first gain value corresponding to the any wavelength to obtain the fifth optical signal Any one of the wavelength of the light beam. After the optical amplifier 301 obtains the fifth optical signal, the fifth optical signal can be transmitted to the optical splitter 302, the optical splitter 302 splits the fifth optical signal, and the split fifth optical signal Launch to the next span of fiber.

In this method, the controller determines multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value detected by the power detection unit, and sends the signal to the optical fiber. The amplifier issues a target control instruction, because the multiple first gain values carried by the target control instruction correspond to the wavelength of the optical signal transmitted in the next optical fiber, even though the fourth optical signal currently received by the optical amplifier corresponds to the target optical signal. The wavelength of the middle beam is different, that is, the wavelength of the fourth optical signal and the target optical signal are dynamically switched. The optical amplifier can also amplify the received fourth optical signal according to the target control command to compensate for the fourth optical signal .

In order to further explain the process of the optical signal compensation device 500 shown in FIG. 5 for compensating the optical signal, refer to the flowchart of an optical signal compensation method provided by an embodiment of the present application as shown in FIG. 9. The method specifically includes:

901. The optical signal compensation device 500 obtains a first optical signal, a second optical signal, and a third optical signal. The first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal, and the first optical signal In the next span of the optical fiber, the target optical signal includes light beams of multiple wavelengths.

The process shown in this step 901 is the same as the process shown in step 801. Here, this step 901 is not described in detail in the embodiment of the present application.

902. The optical signal compensation device 500 obtains the optical power of the target optical signal from the second optical signal.

The process shown in this step 902 is the same as the process shown in step 802. Here, this step 902 is not described in detail in the embodiment of the present application.

903. The optical signal compensation device 500 performs power detection on the third optical signal to obtain filtered optical power of the target optical signal.

The process shown in this step 903 is the same as the process shown in step 803. Here, the embodiment of the present application will not repeat this step 903.

It should be noted that the optical signal compensation apparatus 500 may also perform step 903 first, and then perform step 902, or perform steps 902 and 903 at the same time. The embodiment of the present application does not specifically limit the execution order of step 902 and step 903.

904. The optical signal compensation device 500 determines an average compensation gain value and multiple wavelengths corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the optical power of the target optical signal and the filtered optical power of the target optical signal. A second gain value, the plurality of second gain values are in one-to-one correspondence with the wavelength of the optical signal transmitted in the next span of the optical fiber.

This step 904 can be executed by the controller 504 in the optical signal compensation device 500. In a possible implementation manner, this step 904 can be implemented by the process shown in the following steps 9041-9043.

Step 9041, the controller 504 determines the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value, and the first power detection value is the detected first power The optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering.

The process shown in this step 9041 is described in 5.3 above. Here, the embodiment of the present application will not repeat this step 9041.

Step 9042, the controller 504 determines the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal.

The process shown in this step 9042 is described in section 5.3 above. Here, this embodiment of the present application will not repeat this step 9042.

Step 9043: The controller 504 determines the multiple second gain values according to the average compensation gain value and multiple wavelengths of the optical signal transmitted in the next cross-fiber.

The process shown in this step 9043 is described in 5.3 above. Here, the embodiment of the present application will not repeat this step 9043.

905. The optical signal compensation device 500 compensates the fourth optical signal output from the previous span of the optical fiber according to the average compensation gain value to obtain a sixth optical signal.

When the compensation unit 501 in the optical signal compensation device 500 has only one optical amplifier 5011, this step 905 can be implemented by the process shown by the optical amplifier 5011 in the optical compensation unit 501. The optical amplifier 5011 can amplify the fourth optical signal according to the average compensation gain value to obtain the sixth optical signal.

906. The optical signal compensation device 500 filters the sixth optical signal according to the multiple second gain values to obtain a fifth optical signal.

When the compensation unit 501 in the optical signal compensation device 500 has only one tunable filter 5012, this step 906 can be performed by the tunable filter 5012. For a beam of any wavelength in the six optical signals, the tunable filter 5012 can filter the beam of any wavelength in the sixth optical signal according to the second gain value corresponding to the any wavelength to obtain The light beam of any wavelength in the fifth optical signal.

It should be noted that the process shown in steps 905-906 is a process in which the optical signal compensation device 500 relies on an optical amplifier 5011 and an tunable filter 5012 to compensate the fourth optical signal.

When the compensation unit 501 includes multiple optical amplifiers 5011 or multiple tunable filters 5012, the optical signal compensation device 500 may also perform a multi-stage compensation process on the fourth optical signal.

In a possible implementation manner, the controller 504 may also divide the average compensation gain value into a plurality of first sub-gain values according to the number of the plurality of optical amplifiers 5011, and each first sub-gain value corresponds to one The optical amplifier 5011 corresponds to the first-level compensation process. The controller 504 can also divide the second gain value corresponding to each wavelength into multiple second sub-gain values corresponding to each wavelength according to the number of the multiple tunable filters 5012, so as to obtain multiple sets of second sub-gain values. The gain value, where each group of second sub-gain values corresponds to a tunable filter 5012, which corresponds to the first-stage compensation process.

In a possible implementation manner, the optical signal compensation device 500 performs multi-level compensation on the fourth optical signal, and each level of compensation process corresponds to a first sub-gain value or a set of second sub-gain values. The sum of the corresponding at least one first sub-gain value is equal to the average compensation gain value, and a set of second sub-gain values includes multiple second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber, The multiple wavelengths have a one-to-one correspondence with multiple second sub-gain values, and the sum of at least one second sub-gain value corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength; wherein, In any one of the multi-level compensation processes, when the compensation process corresponds to a first sub-gain value, the optical signal in the compensation process is performed according to the first sub-gain value corresponding to the compensation process. Amplify; when the compensation process corresponds to a set of second sub-gain values, the optical signal in the compensation process is filtered according to a set of second sub-gain values corresponding to the compensation process.

That is, when the compensation process corresponds to a first sub-gain value, an optical amplifier 5011 in the optical signal compensation device 500 performs the compensation process, and when the compensation process corresponds to a set of second sub-gain values, A tunable filter 5012 in the optical signal compensation device 500 performs the compensation process.

In this method, the controller can determine the average compensation gain value and multiple second wavelengths corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber according to the first power detection value and the second power detection value detected by the power detection unit. The first control instruction and the second control instruction are sent to the compensation unit, and the optical amplifier in the compensation unit amplifies the received fourth optical signal according to the average compensation gain value in the first control instruction. The tunable filter in the unit filters the received optical signal according to the multiple second gain values in the second control instruction, so that the fourth optical signal input to the compensation unit can be accurately compensated in real time.

All the above-mentioned optional technical solutions can be combined in any way to form an optional embodiment of the present disclosure, which will not be repeated here.

It should be noted that when the optical signal compensation device provided in the above embodiment compensates for the optical signal, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be allocated to different functional modules according to needs. Complete, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above. In addition, the optical signal compensation method embodiments provided in the foregoing embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiments, and will not be repeated here.

A person of ordinary skill in the art can understand that all or part of the steps in the above embodiments can be implemented by hardware, or by a program to instruct relevant hardware. The program can be stored in a computer-readable storage medium. The storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

The above are only optional embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

An optical signal compensation device, characterized in that the device includes an optical amplifier, an optical splitter, a power detection unit, and a controller; the optical amplifier is connected to the optical splitter and the controller, and the The optical splitter is connected to the power detection unit, and the power detection unit is connected to the controller;

The optical splitter is used to split the target optical signal emitted by the optical amplifier to obtain a first optical signal, a second optical signal, and a third optical signal, and transmit the first optical signal to the next optical fiber , Transmitting the second optical signal and the third optical signal to the power detection unit, the target optical signal includes light beams of multiple wavelengths, and the next optical fiber is used to transmit the optical signal output by the device ；

The power detection unit is configured to perform power detection on the second optical signal and the third optical signal respectively, and send target power information carrying the first power detection value and the second power detection value to the controller, The first power detection value is the detected optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering;

The controller is configured to determine, according to the first power detection value and the second power detection value carried in the target power information, a plurality of first powers corresponding to a plurality of wavelengths of an optical signal transmitted in the next optical fiber A gain value, sending a target control instruction to the optical amplifier, the target control instruction including the plurality of first gain values, and the difference between the plurality of first gain values and the optical signal transmitted in the next span of the optical fiber One to one wavelength correspondence;

The optical amplifier is configured to receive the fourth optical signal outputted from the previous optical fiber, and amplify the fourth optical signal according to the multiple first gain values in the target control instruction to obtain the fifth optical signal. Signal, the fifth optical signal is transmitted to the optical splitter, and the last optical fiber is used to output the optical signal to the device.
The device according to claim 1, wherein the target power information includes first power information and second power information, and the first power information carries the first power detection value, and the second power information Carrying the second power detection value;

The power detection unit includes a first power detector, a filter, and a second power detector; the first power detector is connected to the optical splitter and the controller, and the filter is connected to the optical A splitter and the second power detector are connected, and the second power detector is connected with the controller;

The first power detector is configured to perform power detection on the second optical signal emitted by the optical splitter to obtain the first power detection value, and send the first power information to the controller ；

The filter is configured to linearly filter the third optical signal emitted by the optical splitter to obtain a filtered signal, and transmit the filtered signal to the second power detector;

The second power detector is configured to perform power detection on the filtered signal to obtain the second power detection value, and send the second power information to the controller.
The device according to claim 1 or 2, wherein the controller is used for;

Determine the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information;

The multiple first gain values are determined according to the optical power of the target optical signal and the filtered optical power of the target optical signal.
The device according to claim 3, wherein the controller is configured to:

The multiple Raman gain values corresponding to the multiple wavelengths are determined according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next cross-fiber. The Mann gain value is the gain generated by the Raman effect when the light beams of the multiple wavelengths are transmitted in the next span of the optical fiber, and the multiple Raman gain values are compared with the optical signal transmitted in the next span of the optical fiber. One to one wavelength correspondence;

According to the multiple Raman gain values corresponding to the multiple wavelengths, multiple first gain values corresponding to the multiple wavelengths are determined.
An optical signal compensation device, characterized in that the device includes a compensation unit, an optical splitter, a power detection unit, and a controller; the compensation unit is connected to the optical splitter and the controller, and the The optical splitter is connected to the power detection unit, and the power detection unit is connected to the controller;

The optical splitter is used to split the target optical signal emitted by the compensation unit to obtain a first optical signal, a second optical signal, and a third optical signal, and transmit the first optical signal to the next optical fiber , Transmitting the second optical signal and the third optical signal to the power detection unit, the target optical signal includes light beams of multiple wavelengths, and the next optical fiber is used to transmit the optical signal output by the device ；

The power detection unit is configured to perform power detection on the second optical signal and the third optical signal respectively, and send target power information carrying the first power detection value and the second power detection value to the controller, The first power detection value is the detected optical power of the second optical signal, and the second power detection value is the detected optical power of the third optical signal after filtering;

The controller is configured to determine an average compensation gain value and a plurality of optical signals transmitted in the next optical fiber according to the first power detection value and the second power detection value carried in the target optical power information Multiple second gain values corresponding to the wavelength, sending a first control instruction carrying the average compensation gain value to the compensation unit, and sending a second control instruction carrying the multiple second gain values to the compensation unit, The plurality of second gain values correspond one-to-one with the wavelength of the optical signal transmitted in the next span of the optical fiber;

The compensation unit is configured to receive the fourth optical signal outputted from the previous span of the optical fiber, and the previous span of optical fiber is used to output the optical signal to the device;

The compensation unit further includes at least one optical amplifier and one or more tunable filters, the at least one optical amplifier and one or more tunable filters are connected in sequence, the at least one optical amplifier and one or more tunable filters The tuning filters are all connected to the controller;

The at least one optical amplifier is configured to receive the first control instruction sent by the controller, and amplify the received optical signal according to the average compensation gain value carried in the received first control instruction , Transmit the amplified optical signal;

The one or more tunable filters are configured to receive the second control instruction sent by the controller, and according to the multiple second gain values carried by the received second control instruction, The received optical signal is filtered, and the filtered optical signal is transmitted.
The device according to claim 5, wherein the target power information includes first power information and second power information, and the first power information carries the first power detection value, and the second power information Carrying the second power detection value;

The power detection unit includes a first power detector, a filter, and a second power detector; the first power detector is connected to the optical splitter and the controller, and the filter is connected to the optical A splitter and the second power detector are connected, and the second power detector is connected with the controller;

The first power detector is configured to perform power detection on the second optical signal emitted by the optical splitter to obtain the first power detection value, and send the first power information to the controller ；

The filter is configured to linearly filter the third optical signal emitted by the optical splitter to obtain a filtered signal, and transmit the filtered signal to the second power detector;

The second power detector is configured to perform power detection on the filtered signal to obtain the second power detection value, and send the second power information to the controller.
The device according to claim 5 or 6, wherein the controller is configured to:

Determine the optical power of the target optical signal and the filtered optical power of the target optical signal based on the first power detection value and the second power detection value carried in the target power information;

Determine the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal;

According to the multiple Raman gain values corresponding to the multiple wavelengths, multiple second gain values corresponding to the multiple wavelengths are determined, and the multiple Raman gain values are under the beams of the multiple wavelengths. The gain generated by the Raman effect when one cross-fiber is transmitted, and the multiple Raman gain values correspond to the wavelength of the optical signal transmitted in the next cross-fiber in a one-to-one correspondence.
The device according to claim 7, wherein the controller is configured to:

Determining multiple Raman gain values corresponding to the multiple wavelengths according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next optical fiber;

The average compensation gain value is determined according to the multiple Raman gain values corresponding to the multiple wavelengths.
The device according to claim 8, wherein the controller is configured to:

According to the multiple Raman gain values corresponding to the multiple wavelengths, determine the power gradient of the optical signal transmitted across the next fiber Describe the slope of the optical power varying with wavelength in the next span of the optical fiber;

According to the power gradient and the multiple wavelengths, multiple second gain values corresponding to the multiple wavelengths are determined.
The device according to claim 5, wherein the first control instruction comprises at least one first gain control instruction, each first gain control instruction carries a first sub-gain value, and the at least one first gain control instruction The control instruction corresponds to the at least one optical amplifier one-to-one, and the sum of the at least one first sub-gain value carried by the at least one first gain control instruction is equal to the average compensation gain value;

Each optical amplifier is used to receive a corresponding first gain control instruction sent by the controller, and amplify the received optical signal according to the first sub-gain value carried by the received corresponding first gain control instruction , Transmit the amplified light signal.
The device according to claim 5, wherein the one tunable filter is located at the input end or the output end of any one of the at least one optical amplifier;

The one tunable filter is configured to receive the second control instruction sent by the controller, and perform an adjustment to the received optical signal according to the multiple second gain values carried by the second control instruction Perform filtering and output the filtered optical signal.
The device according to claim 5, wherein each tunable filter of the plurality of tunable filters is located at the input end or the output end of any one of the at least one optical amplifier, or at The output terminal or output terminal of other tunable filters.
The device according to claim 12, wherein the second control instruction comprises a plurality of second gain control instructions, and the number of the plurality of second gain control instructions is equal to the number of the plurality of tunable filters Sum, the plurality of second gain control commands correspond to the plurality of tunable filters in a one-to-one correspondence;

Each second gain control instruction carries a set of second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next cross-fiber, and the multiple wavelengths and the set of second sub-gain values A one-to-one correspondence of a plurality of second sub-gain values;

The sum of the multiple second sub-gain values corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength;

Each tunable filter of the plurality of tunable filters is configured to receive a corresponding second gain control instruction sent by the controller, according to a group of the received corresponding second gain control instructions The second sub-gain value filters the received optical signal and transmits the filtered optical signal.
The device according to any one of claims 5-13, wherein the one or more tunable filters comprise a first tunable filter, and the first tunable filter serves as the compensation unit The output terminal.
The device according to any one of claims 5-14, wherein, within the wavelength range of the optical signal transmitted in each optical amplifier, each of the one or more tunable filters can The spectral shape of the optical signal output by the modulation filter is linear or quasi-linear.
The device according to any one of claims 5-14, wherein the optical power gradient is located at the adjustable optical power of each of the one or more tunable filters. Within the inclination range, the adjustment speed of each of the one or more tunable filters to the optical signal is at least on the order of microseconds.
The device according to any one of claims 5-14, wherein each tunable filter of the one or more tunable filters has a sine filter characteristic, and half of the sine filter characteristic The period is greater than or equal to the wavelength range of the optical signal that each optical amplifier can handle.
An optical signal compensation method, characterized in that the method includes:

Acquire the first optical signal, the second optical signal, and the third optical signal. The first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal output across the optical fiber. The signal is transmitted in the next span of the optical fiber, and the target optical signal includes light beams of multiple wavelengths;

Performing power detection on the second optical signal to obtain the optical power of the target optical signal, and performing power detection on the third optical signal to obtain the filtered optical power of the target optical signal;

According to the optical power of the target optical signal and the filtered optical power of the target optical signal, multiple first gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber are determined, and the multiple The first gain value corresponds to the wavelength of the optical signal transmitted in the next optical fiber in a one-to-one correspondence;

According to the plurality of first gain values, amplify the fourth optical signal output from the previous span of the optical fiber to obtain a fifth optical signal.
18. The method according to claim 18, wherein the amount of the optical signal transmitted in the next optical fiber is determined according to the optical power of the target optical signal and the filtered optical power of the target optical signal. The multiple first gain values corresponding to each wavelength include:

The multiple Raman gain values corresponding to the multiple wavelengths are determined according to the optical power of the target optical signal, the filtered optical power of the target optical signal, and the length of the next cross-fiber. The Mann gain value is the gain generated by the Raman effect when the light beams of the multiple wavelengths are transmitted in the next span of the optical fiber, and the multiple Raman gain values are compared with the optical signal transmitted in the next span of the optical fiber. One to one wavelength correspondence;

According to the multiple Raman gain values corresponding to the multiple wavelengths, multiple first gain values corresponding to the multiple wavelengths are determined.
The method according to claim 18 or 19, wherein the performing power detection on the third optical signal to obtain the filtered optical power of the target optical signal comprises:

Filtering the third optical signal to obtain a filtered signal;

Performing power detection on the filtered signal to obtain a second power detection value, where the second power detection value is the detected optical power of the third optical signal after filtering;

Based on the second power detection value, the filtered optical power of the target optical signal is determined.
An optical signal compensation method, characterized in that the method includes:

Acquire a first optical signal, a second optical signal, and a third optical signal, the first optical signal, the second optical signal, and the third optical signal are obtained by splitting the target optical signal, and the first optical signal is in the next span of the optical fiber Transmission, the target optical signal includes light beams of multiple wavelengths;

Performing power detection on the second optical signal to obtain the optical power of the target optical signal, and performing power detection on the third optical signal to obtain the filtered optical power of the target optical signal;

According to the optical power of the target optical signal and the filtered optical power of the target optical signal, determine the average compensation gain value and multiple second gain values corresponding to multiple wavelengths of the optical signal transmitted in the next optical fiber , The multiple second gain values have a one-to-one correspondence with the wavelength of the optical signal transmitted in the next span of the optical fiber;

According to the average compensation gain value, compensate the fourth optical signal output from the previous span of the optical fiber to obtain the sixth optical signal;

Filter the sixth optical signal according to the multiple second gain values to obtain a fifth optical signal.
22. The method of claim 21, wherein the average compensation gain value is determined according to the optical power of the target optical signal and the filtered optical power of the target optical signal to determine the average compensation gain value and the transmission in the next optical fiber The multiple second gain values corresponding to multiple wavelengths of the optical signal include:

Based on the first power detection value and the second power detection value, the optical power of the target optical signal and the filtered optical power of the target optical signal are determined, and the first power detection value is the detected second light The optical power of the signal, where the second power detection value is the detected optical power of the third optical signal after filtering;

Determine the average compensation gain value according to the optical power of the target optical signal and the filtered optical power of the target optical signal;

According to the multiple Raman gain values corresponding to the multiple wavelengths, multiple second gain values corresponding to the multiple wavelengths are determined, and the multiple Raman gain values are under the beams of the multiple wavelengths. The gain generated by the Raman effect when one cross-fiber is transmitted, and the multiple Raman gain values correspond to the wavelength of the optical signal transmitted in the next cross-fiber in a one-to-one correspondence.
The method according to claim 21 or 22, wherein the method further comprises:

Perform multi-level compensation on the fourth optical signal, each level of compensation process corresponds to a first sub-gain value or a set of second sub-gain values, and the sum of at least one first sub-gain value corresponding to the multi-level compensation process is equal to The average compensation gain value, a set of second sub-gain values includes multiple second sub-gain values corresponding to multiple wavelengths of the optical signal transmitted in the next cross-fiber, and the multiple wavelengths are related to the multiple second sub-gain values. The gain values correspond one-to-one, and the sum of at least one second sub-gain value corresponding to any one of the multiple wavelengths is equal to the second gain value corresponding to the any one wavelength;

Wherein, in any one stage of the multi-stage compensation process, when the compensation process corresponds to a first sub-gain value, the compensation is performed according to the first sub-gain value corresponding to the compensation process The optical signal in the process is amplified; when the compensation process corresponds to a set of second sub-gain values, the optical signal in the compensation process is filtered according to the set of second sub-gain values corresponding to the compensation process .
An optical signal compensation device, wherein the compensation device includes a processor and a memory, and at least one instruction is stored in the memory, and the instruction is loaded and executed by the processor to realize the The operation performed by the optical signal compensation method described in any one of 23 is required.
A computer-readable storage medium, wherein at least one instruction is stored in the storage medium, and the instruction is loaded and executed by a processor to realize the optical signal according to any one of claims 18 to 23 The action performed by the compensation method.