Methods, apparatus, equipment, systems and media for detecting optical signals.

Abstract

A method, apparatus, device, system, and medium for adjusting a detection optical signal are disclosed, belonging to the field of optical communication technology. The method includes acquiring transmission performance parameters of a service optical signal; adjusting the detection optical signal according to the transmission performance parameters, wherein the detection optical signal and the service optical signal are transmitted in the same optical fiber. This method can improve the detection performance of the detection optical signal while the service optical signal transmits service data normally.

Description

Technical Field

[0001] This application relates to the field of optical communication technology, and in particular to a method, apparatus, device, system and medium for detecting optical signals. Background Technology

[0002] With the continuous development of fiber optic communication technology, the complexity of optical networks is increasing. In the actual use of optical networks, monitoring equipment is usually used to monitor and maintain fiber optic links.

[0003] In related technologies, monitoring equipment outputs pulsed optical signals into the optical fiber link and monitors the link based on the reflected or backscattered signals generated by the pulsed optical signals in the fiber. To avoid service interruption in the optical fiber link, the monitoring equipment outputs pulsed optical signals into the optical fiber link while the service optical signals are being transmitted normally.

[0004] However, when the detection optical signal and the service optical signal are transmitted on the same fiber, they will affect each other. This may result in the detection optical signal having limited performance and failing to cover the entire length of the fiber optic link, or the service optical signal failing to transmit normally, leading to service interruption. Summary of the Invention

[0005] This application provides a method, apparatus, device, system, and medium for regulating detection optical signals, which can ensure the normal transmission of service optical signals while improving the detection performance of detection optical signals when detection optical signals and service optical signals are transmitted on the same fiber.

[0006] Firstly, this application provides a method for adjusting a detection optical signal. This parameter adjustment method includes: firstly, acquiring transmission performance parameters of a service optical signal, and then adjusting the detection optical signal based on the acquired transmission performance parameters. The service optical signal and the detection optical signal are transmitted along the same fiber.

[0007] Since the service optical signal and the detection optical signal will interfere with each other when transmitted in the same optical fiber, the transmission performance parameters of the service optical signal are obtained first, and then the detection optical signal is adjusted according to the transmission performance parameters of the service optical signal. This can improve the detection performance of the detection optical signal without affecting the normal transmission of the service optical signal.

[0008] Optionally, the detection optical signal is a pulsed optical signal. Adjusting the detection optical signal includes adjusting one or more of the following parameters of the pulsed optical signal: average optical power, peak optical power, pulse period, pulse width, rising edge slope, and falling edge slope. Different parameters of the pulsed optical signal have different degrees of influence on the service optical signal; therefore, the degree of influence on the service optical signal can be controlled by adjusting the parameters of the pulsed optical signal.

[0009] Optionally, the transmission performance parameters of the service optical signal include one or more of the following parameters: bit error rate performance parameters, polarization state change rate, phase change rate, and nonlinear cost. The bit error rate performance parameters may include bit error rate and / or number of bit errors. These parameters can all be used to measure whether the service optical signal can transmit service data normally; therefore, one or more of them can be selected as the transmission performance parameters of the service optical signal.

[0010] Optionally, the bit error performance parameters include pre-correction bit error performance parameters and / or post-correction bit error performance parameters. Both pre-correction and post-correction bit error performance parameters can reflect whether the service optical signal can transmit service data normally. Therefore, at least one of these two bit error performance parameters can be used as the transmission performance parameter of the service optical signal.

[0011] When the bit error performance parameters include pre-correction bit error performance parameters and post-correction bit error performance parameters, the detection optical signal is adjusted according to the acquired transmission performance parameters, including: increasing the optical power of the detection optical signal when the pre-correction bit error performance parameter is less than a first pre-correction bit error threshold and the post-correction bit error performance parameter is less than the first post-correction bit error threshold; or, keeping the optical power of the detection optical signal unchanged when the pre-correction bit error performance parameter is greater than the first pre-correction bit error threshold and less than a second pre-correction bit error threshold, and the post-correction bit error performance parameter is greater than the first post-correction bit error threshold and less than the second post-correction bit error threshold; or, decreasing the optical power of the detection optical signal when the pre-correction bit error performance parameter is greater than the second pre-correction bit error threshold and the post-correction bit error performance parameter is greater than the second post-correction bit error threshold; or, decreasing the optical power of the detection optical signal when the pre-correction bit error performance parameter is greater than the second pre-correction bit error threshold and the post-correction bit error performance parameter is less than the second post-correction bit error threshold.

[0012] Wherein, the first pre-correction error threshold is less than the second pre-correction error threshold, and the first post-correction error threshold is less than the second post-correction error threshold. In implementation, the first pre-correction error threshold is slightly lower than the second pre-correction error threshold, and the first post-correction error threshold is slightly lower than the second post-correction error threshold. For example, the first pre-correction error threshold is X times the second pre-correction error threshold; for instance, X is greater than or equal to 0.9 and less than or equal to 0.98; the first post-correction error threshold is Y times the second post-correction error threshold; for instance, Y is greater than or equal to 0.9 and less than or equal to 0.98.

[0013] In this first possible implementation, using pre-correction error performance parameters and post-correction error performance parameters to measure the transmission performance of the service optical signal is more accurate, which helps to improve the reliability of service transmission and avoid service interruption.

[0014] When the bit error performance parameter is the post-correction bit error performance parameter, the detection optical signal is adjusted according to the obtained transmission performance parameter, including: increasing the optical power of the detection optical signal when the post-correction bit error performance parameter is less than the third post-correction bit error threshold; or, keeping the optical power of the detection optical signal unchanged when the post-correction bit error performance parameter is greater than the third post-correction bit error threshold and less than the fourth post-correction bit error threshold; or, decreasing the optical power of the detection optical signal when the post-correction bit error performance parameter is greater than the fourth post-correction bit error threshold.

[0015] The third post-correction error threshold is less than the fourth post-correction error threshold. In practice, the third post-correction error threshold is slightly lower than the fourth post-correction error threshold. For example, the third post-correction error threshold is Z times the fourth post-correction error threshold, for instance, Z is greater than or equal to 0.9 and less than or equal to 0.98.

[0016] In this second possible embodiment, since the post-correction error performance parameter can intuitively reflect the service transmission performance of the service optical signal, the detection optical signal can also be adjusted solely based on the post-correction error performance parameter. Furthermore, adjusting the detection optical signal based on the post-correction error performance parameter requires less statistical data and is simpler to implement.

[0017] Optionally, increasing the optical power of the detected optical signal can be achieved in either of the following two ways:

[0018] Method 1: Increase the optical power of the detection optical signal based on the slope of its rising or falling edge. Since the slope of the rising or falling edge of the detection optical signal is closely related to the transmission performance of the service optical signal, increasing the optical power of the detection optical signal based on its rising or falling edge can further ensure the normal transmission of service data during the adjustment process of the detection optical signal.

[0019] Method 2: Increase the optical power of the detected optical signal according to the length in step 1. Optionally, the length in step 1 can be a fixed value, or it can be calculated based on the current optical power of the detected optical signal. Increasing the optical power of the detected optical signal according to the length in step 1 is a simple and easy-to-implement adjustment method.

[0020] Alternatively, the optical power of the detected optical signal can be reduced in either of the following two ways:

[0021] Method 1: Reduce the optical power of the detection optical signal based on the slope of its rising or falling edge. Since the slope of the rising or falling edge of the detection optical signal is closely related to the transmission performance of the service optical signal, reducing the optical power of the detection optical signal based on its rising or falling edge can further ensure the normal transmission of service data during the adjustment process of the detection optical signal.

[0022] Method 2: Reduce the optical power of the detected optical signal according to the second step length. Optionally, the second step length can be a fixed value, or it can be calculated based on the current optical power of the detected optical signal. Increasing the optical power of the detected optical signal according to the second step length is a simple and easy-to-implement adjustment method.

[0023] Optionally, the method further includes: monitoring changes in the configuration of the service optical signal. The step of obtaining the transmission performance parameters of the service optical signal includes: obtaining the transmission performance parameters of the service optical signal when the configuration of the service optical signal changes.

[0024] Secondly, a modulation device for detecting optical signals is also provided. This modulation device for detecting optical signals has the function of implementing the method described in the first aspect. The function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described function.

[0025] Thirdly, a computer device is also provided, including a processor and a memory, wherein the memory stores program code; the processor is used to read and execute the program code stored in the memory to implement the modulation method for detecting optical signals provided in the first aspect.

[0026] Optionally, the processor may be one or more, and the processor may be a multi-core processor, and the memory may be one or more.

[0027] Optionally, the memory may be integrated with the processor, or the memory may be separated from the processor.

[0028] In the specific implementation process, the memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or set on different chips. This application does not limit the type of memory or the way the memory and processor are set.

[0029] Fourthly, a computer-readable storage medium is also provided, wherein a software program is stored therein, which, when read and executed by one or more processors, can implement the method for adjusting the detection optical signal provided in the first aspect.

[0030] Fifthly, a computer program (product) is provided, the computer program (product) comprising: computer program code, wherein when the computer program code is run by a computer device, the computer device executes the aforementioned method for regulating the detection optical signal provided in the first aspect.

[0031] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface. The processor is configured to execute instructions to cause the chip to perform the modulation method for detecting optical signals provided in the first aspect.

[0032] In a seventh aspect, an optical communication system is provided, comprising a first optical communication device, a second optical communication device, and a monitoring device, wherein the first optical communication device and the second optical communication device are connected via an optical fiber link, the first optical communication device is used to send a service optical signal to the second optical communication device via the optical fiber link, the monitoring device is used to transmit a detection optical signal to the optical fiber link, and the monitoring device, the first optical communication device, or the second optical communication device is used to implement any one of the detection optical signal adjustment methods provided in the first aspect. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of an optical communication system provided in an embodiment of this application;

[0034] Figure 2 This is a schematic flowchart of a method for adjusting a detected optical signal provided in an embodiment of this application;

[0035] Figure 3 This is a schematic flowchart of another method for adjusting the detection optical signal provided in an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a light signal detection adjustment device provided in an embodiment of this application;

[0037] Figure 5This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the structure of an optical communication system provided in an embodiment of this application. For example... Figure 1 As shown, the optical communication system includes a first optical communication device 11 and a second optical communication device 21. The first optical communication device 11 and the second optical communication device 21 are connected by an optical fiber link a.

[0040] The first optical communication device 11 transmits a service optical signal to the second optical communication device 21 via optical fiber link a. This service optical signal carries service data. After receiving the service optical signal, the second optical communication device 21 performs photoelectric conversion on the service optical signal to obtain an electrical signal; then it performs demodulation and decoding on the electrical signal to obtain the service data carried by the service optical signal.

[0041] To monitor the fiber optic link a, the optical communication system also includes monitoring devices 12 and 22. Monitoring devices 12 and 22 transmit detection optical signals, which, when transmitted through the fiber optic link a, generate reflected and scattered signals. Monitoring devices 12 and 22 receive these reflected and scattered signals and monitor the fiber optic link a based on the received reflected and / or scattered signals.

[0042] Optionally, the monitoring device 12 or the monitoring device 22 can be an optical time domain reflectometer (OTDR) or a distributed fiber acoustic sensing (DAS) device.

[0043] The OTDR transmits the detection optical signal to the fiber optic link 'a'. When it encounters fiber joints, breaks, defects, or end faces, reflected signals are generated. Simultaneously, Rayleigh scattering occurs due to inhomogeneous particles in the fiber material. The OTDR receives the back-reflected and scattered signals and generates data on how the intensity of these signals varies with the fiber distance.

[0044] The DAS device transmits the detection optical signal to fiber optic link a, and obtains the changes in the physical quantity to be detected (such as sound, vibration, etc.) by detecting the phase change of Rayleigh scattered light at various points along the fiber.

[0045] Since both the service optical signal and the detection optical signal are transmitted through the optical fiber link a, the optical communication system also includes a first wavelength division multiplexing unit 13 and a second wavelength division multiplexing unit 23.

[0046] In some examples, the detection optical signal and the service optical signal are transmitted in the same direction. In this case, the monitoring device 12 is located on one side of the first optical communication device 11, and both the monitoring device 12 and the first optical communication device 11 are connected to the first wavelength division multiplexing unit 13. The first wavelength division multiplexing unit 13 can combine the detection optical signal transmitted by the monitoring device 12 and the service optical signal output by the first optical communication device 11 into a single multiplexed signal, and send the multiplexed signal into the optical fiber link a, which is then transmitted along the optical fiber link a to the second optical communication device 21. The second optical communication device 21 is connected to the second wavelength division multiplexing unit 23, which receives the multiplexed signal output from the optical fiber link a, filters out the detection optical signal from the multiplexed signal, and transmits the service optical signal to the second optical communication device 21. Optionally, the monitoring device 12 and the first optical communication device 11 can be integrated together, or they can be set up independently.

[0047] In other examples, the detection optical signal is transmitted in the opposite direction to the service optical signal. In this case, the monitoring device 22 is located on one side of the second optical communication device 21, and both the monitoring device 22 and the second optical communication device 21 are connected to a second wavelength division multiplexing unit 23. This second wavelength division multiplexing unit 23 can receive the detection optical signal transmitted by the monitoring device 22 and send it into the optical fiber link a, transmitting it along the optical fiber link a to the first optical communication device 11. This second wavelength division multiplexing unit can also receive the service optical signal in the optical fiber link a and transmit it to the second optical communication device 21. Optionally, the monitoring device 22 and the second optical communication device 21 can be integrated together, or they can be set up separately.

[0048] To avoid interference between the detection optical signals output by monitoring device 12 and monitoring device 22, monitoring device 12 and monitoring device 22 can operate in a time-sharing manner, that is, monitor the optical fiber link a at different time periods. In other embodiments, the optical communication system may include only one of monitoring device 12 and monitoring device 22.

[0049] In this embodiment, both the first optical communication device 11 and the second optical communication device 21 can be optical transport network (OTN) devices; alternatively, both the first optical communication device 11 and the second optical communication device 21 can be access network devices. This embodiment does not limit the application scenario of the optical communication system. Optionally, the OTN device can be a reconfigurable optical add-drop multiplexer (ROADM), etc. The access network device can be an optical line terminal (OLT), an optical network unit (ONU) (or an optical network terminal (ONT), etc.).

[0050] Optionally, such as Figure 1 As shown, the first optical communication device 11 includes an optical module and a control unit, the control unit being used to control the optical module to transmit the aforementioned service optical signals. Optionally, the first optical communication device 11 may include one or more optical modules. Figure 1 Only one optical module is shown in the diagram. When the first optical communication device 11 includes multiple optical modules, it may also include wavelength selected switch (WSS) and other wavelength division multiplexing / demultiplexing devices. Each of the multiple optical modules is connected to a branch port of the WSS, and the common port of the WSS is connected to the first wavelength division multiplexing unit 13. This wavelength division multiplexing / demultiplexing device is used to combine the service optical signals output from the multiple optical modules into a single channel before transmitting it to the first wavelength division multiplexing unit 13.

[0051] In some examples, the first optical communication device 11 is also used to acquire relevant data from the monitoring device 12 and send the acquired data to other devices (e.g., network management devices). These other devices can display the received data and perform unified monitoring and management of the optical network based on the received data. The relevant data includes one or more of the following: parameters of the detection optical signal output by the monitoring device 12, the monitoring capabilities of the monitoring device 12 (e.g., detection distance and attenuation value of the detection optical signal power per unit distance), and data monitored by the monitoring device 12.

[0052] The second optical communication device 21 includes an optical module and a control unit. The optical module receives the aforementioned service optical signal and performs photoelectric conversion on the received service optical signal. The control unit obtains the service data carried by the service optical signal. Optionally, the second optical communication device 21 may include one or more optical modules. When the second optical communication device 21 includes multiple optical modules, it also includes a WSS (Wavelength Division Multiplexing) device. Multiple optical modules are each connected to a branch port of the WSS, and the common port of the WSS is connected to the second wavelength division multiplexing unit 23. This WSS device is used to divide the received service optical signal into multiple paths and then output them to the corresponding optical modules for processing.

[0053] In some examples, the second optical communication device 21 is also used to acquire relevant data from the monitoring device 22 and send the acquired data to other devices (e.g., network management devices). These other devices can display the received data and perform unified monitoring and management of the optical network based on the received data. The relevant data includes one or more of the following: parameters of the detection optical signal output by the monitoring device 22, the monitoring capabilities of the monitoring device 22 (e.g., detection distance and attenuation value of the detection optical signal power per unit distance), and data monitored by the monitoring device 22.

[0054] For example, the service optical signal can be an optical signal of the target band. The target band can be any band among the original (O) band, conventional (C) band, long wavelength (L) band, and short wavelength (S) band, or a combination band consisting of at least two bands among the O band, C band, L band, and S band, such as a combination band consisting of the C band and L band, or a combination band consisting of the C band, L band, and S band, etc.

[0055] In this case, the wavelengths of the detection optical signal and the service optical signal are different. In some examples, the wavelength of the detection optical signal can be greater than the maximum wavelength of the target band, or the wavelength of the detection optical signal can be less than the minimum wavelength of the target band. In other examples, when the target band is a combined band, the wavelength of the detection optical signal can be located between two adjacent bands in the combined band.

[0056] For example, the detected optical signal is a pulsed optical signal, which can be a narrow pulse optical signal on the order of nanoseconds or microseconds.

[0057] When detection optical signals and service optical signals are transmitted on the same fiber, a higher optical power for the detection optical signal allows for a longer fiber optic link to be covered, but also results in greater interference with the service optical signal. Conversely, a lower optical power for the detection optical signal results in less interference with the service optical signal, but also a shorter fiber optic link to be covered. Therefore, it is necessary to set the optical power of the detection optical signal appropriately.

[0058] Therefore, this application provides a method for adjusting a detection optical signal, which adjusts the detection optical signal according to the transmission performance parameters of the service optical signal, so as to improve the detection performance of the detection optical signal while ensuring the normal transmission of the service optical signal.

[0059] Figure 2 This is a flowchart illustrating a method for adjusting a detected optical signal according to an embodiment of this application. This method can be executed by a control unit of the aforementioned monitoring device, which can be integrated into the monitoring device, or integrated into the aforementioned first optical communication device or second optical communication device (i.e., by...). Figure 1 (Executed by the control unit in the system), or set independently. For example... Figure 2 As shown, the method includes the following steps.

[0060] In step 201, the transmission performance parameters of the service optical signal are obtained.

[0061] Transmission performance parameters are used to measure the data transmission performance of service optical signals. For example, whether service data can be transmitted normally.

[0062] Optionally, the transmission performance parameters include one or more of the following parameters: bit error rate performance, nonlinearity cost, phase change rate, and polarization state change rate. These parameters can all be used to measure whether service data can be transmitted normally through the service optical signal. Therefore, one or more of them can be selected as the transmission performance parameters of the service optical signal.

[0063] The bit error rate performance parameters may include the bit error rate and / or the number of bit errors. The number of bit errors refers to the number of erroneous bits present in one measurement period. The bit error rate can be the bit error ratio (BER), which is equal to the ratio of the number of erroneous bits to the total number of bits transmitted in the measurement period. The length of the measurement period can be set according to actual needs, and this embodiment does not impose any limitations on it. For example, the unit of measurement period length may be microseconds, milliseconds, seconds, or minutes.

[0064] In this embodiment, a smaller bit error rate performance parameter results in better transmission performance of the service optical signal; a larger bit error rate performance parameter results in worse transmission performance of the service optical signal. A higher nonlinearity cost increases the likelihood of bit errors and worsens transmission performance of the service optical signal; a lower nonlinearity cost decreases the likelihood of bit errors and improves transmission performance. A large phase change rate results in a larger nonlinearity cost, potentially leading to poorer transmission performance of the service optical signal; a small phase change rate results in a relatively smaller nonlinearity cost and better transmission performance. Similarly, a large polarization state change rate results in a larger nonlinearity cost, leading to poorer transmission performance of the service optical signal; a small phase change rate results in a relatively smaller nonlinearity cost and better transmission performance.

[0065] In step 202, the detection optical signal is adjusted according to the obtained transmission performance parameters.

[0066] In this process, the detection optical signal and the service optical signal are transmitted in the same optical fiber.

[0067] Since the detection optical signal and the service optical signal transmitted in the same optical fiber can interfere with each other, it is possible to first obtain the transmission performance parameters of the service optical signal and then adjust the detection optical signal according to the transmission performance parameters of the service optical signal. This can reduce the mutual interference between the detection optical signal and the service optical signal, thereby improving the detection performance of the detection optical signal while ensuring the normal transmission of service data by the service optical signal.

[0068] Figure 3 This is a flowchart illustrating a method for adjusting a detected optical signal according to an embodiment of this application. In this embodiment, the bit error rate performance parameter is used as an example to illustrate the method, taking the transmission performance parameter of the service optical signal as the example. This method can be executed by the control unit of the aforementioned monitoring device, which can be integrated into the monitoring device, or it can be integrated into the aforementioned first optical communication device or second optical communication device (i.e., by…). Figure 1 (Executed by the control unit in the system), or set independently.

[0069] like Figure 3 As shown, the method includes the following steps.

[0070] In step 301, the configuration of the monitoring service optical signal is checked to see if it meets the triggering conditions.

[0071] When the configuration of the service optical signal meets the triggering conditions, execute steps 302 and 303; when the configuration of the service optical signal does not meet the triggering conditions, return to step 301.

[0072] Optionally, the service optical signal can be a single-wavelength optical signal or a multi-wavelength optical signal. A multi-wavelength optical signal includes multiple single-wavelength optical signals.

[0073] For example, the triggering condition includes a change in the configuration of the service optical signal. The configuration of the service signal optical light includes the wavelength of the service optical signal, the number of service optical signals, or the total power of the service optical signals, etc.

[0074] The number of service optical signals changes, including the presence of service optical signals being added to or removed from the network.

[0075] When the configuration of the service optical signal changes, the impact of the power of the detection optical signal on the service optical signal may also change. Therefore, it is necessary to adjust the detection optical signal.

[0076] In some embodiments, the optical communication system may further include a monitoring unit for monitoring the wavelength and / or total power of the service optical signal. This monitoring unit is located on one side of the second optical communication device and may be integrated into the second optical communication device, or it may be set up separately from the second optical communication device. The control unit of the monitoring device determines whether the configuration of the service optical signal meets the triggering conditions based on the information monitored by the monitoring unit.

[0077] In one possible implementation, the monitoring unit is used to monitor the total power of the service optical signal. In this case, the monitoring unit may include a splitter and a power detection device. The splitter is used to split the service optical signal from the fiber optic link into two paths, one path which is transmitted to an optical module for processing, and the other path which is transmitted to the power detection device to obtain the total power of the service optical signal.

[0078] In another possible implementation, the monitoring unit can simultaneously monitor the wavelength and total power of the service optical signal. In this case, the monitoring unit may include a beam splitter, a wavelength division multiplexing (WDM) device, and multiple power detection devices. The WDM device includes an input port and multiple output ports, each output port connected to a power detection device. The beam splitter splits the service optical signal from the fiber optic link into two paths: one path is transmitted to an optical module for processing, and the other path is transmitted to the input port of the WDM device. The WDM device divides the service optical signal according to wavelength, with each output port outputting a service optical signal of one wavelength. The power detection devices receive the service optical signals output from their connected output ports, thereby obtaining the optical power of the service optical signal at the corresponding wavelength. The sum of the optical powers obtained by each power detection device is the total power of the service optical signal.

[0079] In both of the above possible implementations, the power detection device includes, but is not limited to, a photodetector (PD). Furthermore, this application embodiment does not limit the splitting ratio of the beam splitter, which can be 1:99, 0.5:99.5, etc. The path with higher power is transmitted to the optical module.

[0080] Optionally, the monitoring unit can also be used to perform power inversion based on the monitored optical power to obtain the transmitted optical power of the first optical communication device and related characteristics of the optical fiber link. The second optical communication device is also used to send the information obtained by the monitoring unit to the network management device for unified monitoring and management of the optical network.

[0081] Step 301 is an optional step. In other embodiments, it can be replaced by performing the aforementioned steps 301 and 302 when an adjustment command is received. The adjustment command is used to instruct the adjustment of the detection optical signal.

[0082] In step 302, the bit error rate performance parameters of the service optical signal are obtained.

[0083] Optionally, the bit error rate performance parameters may include pre-correction bit error rate performance parameters and / or post-correction bit error rate performance parameters. To improve the reliability of data transmission in an optical communication system, the first optical communication device typically performs forward error correction (FEC) encoding on the service data to obtain coded data, and then uses the coded data to modulate the carrier optical signal to obtain the service optical signal. After receiving the service optical signal, the second optical communication device first converts the service optical signal into an electrical signal, and then demodulates and decodes the electrical signal to obtain the service data.

[0084] Among them, the pre-correction bit error performance parameter is used to indicate the bit error performance at the second optical communication device before FEC error correction; the post-correction bit error performance parameter is used to indicate the bit error performance at the second optical communication device after FEC error correction.

[0085] Pre-correction error rate performance parameters can be either the number of errors or the bit error rate. Post-correction error rate performance parameters can also be either the number of errors or the bit error rate.

[0086] In optical communication systems, the main factors affecting bit error rate (BER) are noise, nonlinearity, and dispersion (including polarization mode dispersion (PMD) and chromatic dispersion (CD)). When these factors are fixed in the line design of the optical communication system, the system's optical signal-to-noise ratio (OSNR) is also fixed, and the bit error rate before correction of the second optical communication device is constant. A higher OSNR results in a lower bit error rate before correction, while a decrease in OSNR leads to a corresponding increase in the bit error rate before correction.

[0087] The pre-correction error performance parameters and post-correction error performance parameters can be obtained by statistically analyzing the bit errors within the measurement period. This application does not limit the statistical method used; any method from related technologies can be employed.

[0088] In some embodiments, the bit error rate performance parameters can be obtained by a separate device, such as a bit error rate tester. In other embodiments, the bit error rate performance parameters can be obtained by a circuit module integrated in the optical module of the second optical communication device or the control unit of the second optical communication device.

[0089] See you again Figure 1 For monitoring device 12, which is located on the same side as the first optical communication device 11, after the second optical communication device 21 detects the bit error rate performance parameters, it transmits them to the control unit of monitoring device 12 (e.g., the control unit of the first optical communication device 11) through the optical supervisory channel (OSC). In this case, the optical communication system also includes a first OSC unit 14 and a second OSC unit 24. The first OSC unit 14 is connected to the first wavelength division multiplexing unit 13, and the second OSC unit 24 is connected to the second wavelength division multiplexing unit 23. The second OSC unit 24 is used to output a monitoring optical signal carrying the aforementioned bit error rate performance parameters. The second wavelength division multiplexing unit 23 is also used to output the monitoring optical signal to optical fiber link a. The second wavelength division multiplexing unit 23 is also used to send the monitoring optical signal received from optical fiber link a to the first OSC unit 14, and the first OSC unit 24 extracts the bit error rate performance parameters from the monitoring optical signal and sends them to the control unit of the monitoring device.

[0090] In the embodiments of this application, the wavelengths of the monitoring optical signal and the service optical signal are different, and also different from the wavelengths of the detection optical signal.

[0091] When the monitoring device 22 is located on the same side as the second optical communication device 21, the second optical communication device 21 can directly transmit the bit error rate performance parameters to the control unit of the monitoring device 22 after detecting them.

[0092] In step 303, the detection optical signal is adjusted according to the obtained bit error rate performance parameters.

[0093] In this embodiment, the detected optical signal is a pulsed optical signal. Adjusting the detected optical signal refers to adjusting the parameters of the pulsed optical signal. The parameters of the pulsed optical signal include, but are not limited to, one or more of the following: average optical power, peak optical power, pulse period, pulse width, rising edge slope, and falling edge slope. Different pulsed optical signal parameters have different effects on the service optical signal. Therefore, the detection performance of the pulsed optical signal and the degree of influence on the service optical signal can be adjusted by regulating the parameters of the pulsed optical signal.

[0094] In step 303, the detection optical signal is adjusted to change the slope of its rising edge and / or falling edge. An excessively large rising edge slope or an excessively small falling edge slope indicates steep rising and falling edges, which can lead to burst errors and severely impact the transmission performance of the service optical signal. Therefore, it is necessary to change the slope of the rising edge and / or falling edge of the detection optical signal to reduce its impact on the transmission performance of the service optical signal.

[0095] In a first possible implementation, the error performance parameters include pre-correction error performance parameters and post-correction error performance parameters.

[0096] In this embodiment, step 303 may have the following possible scenarios:

[0097] The first method involves maintaining the optical power of the detected optical signal unchanged when the pre-correction error performance parameter is greater than the first pre-correction error threshold and less than the second pre-correction error threshold, and the post-correction error performance parameter is greater than the first post-correction error threshold and less than the second post-correction error threshold.

[0098] In this case, both the pre-correction error performance parameters and the post-correction error performance parameters are within a suitable range, indicating that the data transmission performance of the service optical signal is good, and the impact of the detection optical signal on the service optical signal does not affect the normal transmission of service data. Both the second pre-correction error threshold and the second post-correction error threshold are used to measure whether service data can be transmitted normally. If the pre-correction error performance parameter is greater than the second pre-correction error threshold, or if the post-correction error performance parameter is greater than the second post-correction error threshold, service data cannot be transmitted normally and may be interrupted.

[0099] The second approach is to increase the optical power of the detected optical signal when the pre-correction error performance parameter is less than the first pre-correction error threshold and the post-correction error performance parameter is less than the first post-correction error threshold.

[0100] In this case, the transmission performance of the service optical signal is excellent. Under these circumstances, even if the interference of the detection optical signal on the service optical signal is appropriately increased, it will not affect the normal transmission of service data. Therefore, the peak optical power of the detection optical signal can be increased to improve the detection performance of the detection optical power.

[0101] The third approach is to reduce the optical power of the detected optical signal when the pre-correction error performance parameter is greater than the second pre-correction error threshold and the post-correction error performance parameter is greater than the second post-correction error threshold.

[0102] In this situation, both the pre-correction error performance parameters and the post-correction error performance parameters are large, and the service optical signal cannot transmit service data normally. This indicates that the detection optical signal is interfering too much with the service optical signal, and it is necessary to reduce the optical power of the detection optical signal to reduce its impact on the service optical signal.

[0103] The fourth method is to reduce the optical power of the detected optical signal when the pre-correction error performance parameter is greater than the second pre-correction error threshold and the post-correction error performance parameter is less than the second post-correction error threshold.

[0104] In this situation, the pre-correction error performance parameter is relatively large. However, through error correction, the post-correction error performance parameter can be brought within the second post-correction error threshold, meaning that service data can be obtained normally through error correction. However, the large pre-correction error performance parameter means that if a sudden disturbance occurs, the pre-correction error performance parameter may continue to increase, potentially leading to a post-correction error performance parameter exceeding the second post-correction error threshold, resulting in the inability to transmit service data normally. Therefore, it is still necessary to reduce the optical power of the detection optical signal.

[0105] Since the pre-correction error performance parameter is greater than or equal to the post-correction error performance parameter, there is no situation where the pre-correction error performance parameter is less than the second pre-correction error threshold, but the post-correction error performance parameter is greater than the second post-correction error threshold.

[0106] In the above scenarios, the first pre-correction error threshold is less than the second pre-correction error threshold, and the first post-correction error threshold is less than the second post-correction error threshold. For example, the first pre-correction error threshold is X times the second pre-correction error threshold, where X is greater than or equal to 0.8 and less than 1. For instance, X is greater than or equal to 0.9 and less than or equal to 0.98. For example, the first post-correction error threshold is Y times the second post-correction error threshold, where Y is greater than or equal to 0.8 and less than 1. For instance, Y is greater than or equal to 0.9 and less than or equal to 0.98. X and Y may be equal or unequal.

[0107] As an example, X and Y are both equal to 0.9, 0.95, or 0.98.

[0108] As mentioned earlier, the second pre-correction error threshold is related to the system OSNR and can be obtained through testing. For example, the second pre-correction error threshold can be calculated as the sum of the pre-correction error performance parameter and a set deviation when the service optical signal is transmitted alone in the optical fiber under the same system OSNR (i.e., the service optical signal is not transmitted on the same fiber as the detection optical signal). For example, the pre-correction error performance parameter is the number of errors, and the set deviation is in the range of tens to hundreds. The value of the set deviation can be set empirically, and this application embodiment does not impose any limitations on this. When the pre-correction error performance parameter exceeds this second pre-correction error threshold, an uncorrectable situation may occur.

[0109] The second post-correction error threshold can be related to the error correction capability of the optical module. For example, for optical modules with strong error correction capabilities, the second post-correction error threshold is larger; for optical modules with weak error correction capabilities, the second post-correction error threshold is smaller. For instance, when the post-correction error performance parameter is the post-correction error rate, the second post-correction error threshold can be 2.5 × e -2 -4.5×e -2 For most optical modules, the post-correction bit error rate can be less than this second post-correction bit error threshold.

[0110] In this first possible implementation, using pre-correction error performance parameters and post-correction error performance parameters to measure the transmission performance of the service optical signal is more accurate, which helps to improve the reliability of service transmission and avoid service interruption.

[0111] In the second possible implementation, the error performance parameter is the pre-correction error performance parameter.

[0112] In this embodiment, step 303 may have the following possible scenarios:

[0113] The first method involves maintaining the optical power of the detected optical signal unchanged when the pre-correction error performance parameter is greater than the first pre-correction error threshold and less than the second pre-correction error threshold.

[0114] In this first case, the error correction performance parameters are within a suitable range, indicating that the data transmission performance of the service optical signal is good, and the impact of the detection optical signal on the service optical signal does not affect the normal transmission of service data.

[0115] The second approach is to increase the optical power of the detected optical signal when the pre-correction error performance parameter is less than the first pre-correction error threshold.

[0116] In this case, the transmission performance of the service optical signal is very good, indicating that it can tolerate more of the influence of the detection optical signal. Therefore, the peak optical power of the detection optical signal can be increased to improve the detection performance of the detection optical signal.

[0117] The third approach is to reduce the optical power of the detected optical signal when the pre-correction error performance parameter is greater than the second pre-correction error threshold.

[0118] The fourth pre-correction error threshold is related to the system OSNR and can be obtained through testing. The testing method for the fourth pre-correction error threshold is the same as that for the second pre-correction error threshold. In implementation, the fourth pre-correction error threshold can be lower than the second pre-correction error threshold to ensure that the service optical signal can tolerate a certain amount of interference and improve the reliability of service data transmission.

[0119] In this second possible implementation, the third pre-correction error threshold is less than the fourth pre-correction error threshold. In practice, the third pre-correction error threshold is slightly lower than the fourth pre-correction error threshold. For example, the third pre-correction error threshold is W times the fourth pre-correction error threshold; for instance, W is greater than or equal to 0.9 and less than or equal to 0.98.

[0120] In this second possible embodiment, adjusting the detection optical signal based on the pre-correction error performance parameters requires less statistical data and is simpler to implement.

[0121] In the third possible implementation, the error performance parameter is the corrected error performance parameter.

[0122] In this embodiment, step 303 may have the following possible scenarios:

[0123] The first method involves keeping the optical power of the detected optical signal constant when the post-correction error performance parameter is greater than the third post-correction error threshold but less than the fourth post-correction error threshold.

[0124] In this first case, the error correction performance parameter is within a suitable range, indicating that the data transmission performance of the service optical signal is good, and the influence of the detection optical signal on the service optical signal does not affect the normal transmission of service data.

[0125] The second approach is to increase the optical power of the detected optical signal when the post-correction error performance parameter is less than the first post-correction error threshold.

[0126] In this case, the transmission performance of the service optical signal is very good, indicating that it can tolerate more of the influence of the detection optical signal. Therefore, the peak optical power of the detection optical signal can be increased to improve the detection performance of the detection optical signal.

[0127] The third approach is to reduce the optical power of the detected optical signal when the post-correction error performance parameter is greater than the second post-correction error threshold.

[0128] The fourth post-correction error threshold can be related to the error correction capability of the optical module. For example, for optical modules with strong error correction capabilities, the fourth post-correction error threshold is larger; for optical modules with weak error correction capabilities, the fourth post-correction error threshold is smaller. For instance, this fourth post-correction error threshold can be smaller than the aforementioned second post-correction error threshold to ensure that the service optical signal can tolerate a certain amount of interference and improve the reliability of service data transmission.

[0129] In this third possible implementation, the third post-correction error threshold is less than the fourth post-correction error threshold. In practice, the third post-correction error threshold is slightly lower than the fourth post-correction error threshold. For example, the third post-correction error threshold is Z times the fourth post-correction error threshold; for instance, Z is greater than or equal to 0.9 and less than or equal to 0.98.

[0130] In this third possible embodiment, since the post-correction error performance parameter can intuitively reflect the service transmission performance of the service optical signal, the detection optical signal can also be adjusted solely based on the post-correction error performance parameter. Furthermore, adjusting the detection optical signal based on the post-correction error performance parameter requires less statistical data and is simpler to implement.

[0131] In this embodiment, the optical power of the detected optical signal is the peak optical power. The peak optical power can be adjusted by changing the driving current of the laser in the monitoring device. The larger the driving current, the larger the peak optical power; the smaller the driving current, the smaller the peak optical power, which is convenient to implement.

[0132] The methods for increasing and decreasing the optical power of the detected optical signal are explained below.

[0133] Ways to increase the optical power of the detected optical signal:

[0134] Method 1: Increase the optical power of the detection optical signal based on the slope of the rising or falling edge of the detection optical signal.

[0135] In this first method, if the slope of the rising edge of the detected optical signal is too large or the slope of the falling edge of the detected optical signal is too small, it indicates that the rising and falling edges are steep, which will affect the transmission performance of the service optical signal. Therefore, a slope threshold can be set. When the slope of the rising edge of the detected optical signal is less than or equal to the slope threshold, the service optical signal can transmit service data normally.

[0136] The slope threshold can be obtained through testing. For example, the testing process is as follows: The monitoring device outputs multiple pulsed light beams so that these pulsed light beams are transmitted along the same fiber as the service optical signal. Simultaneously, the monitoring device controls the slope of the rising edge of the pulsed light beams to increase sequentially. For example, the slope of the pulsed light output in the first time period is the first slope, and the slope of the pulsed light output in the second time period is the second slope. The first slope is less than the second slope, and the second time period is the time period following the first time period. During this process, the change in the post-correction bit error rate of the service optical signal is monitored, and the slope threshold is determined based on the slope corresponding to when the post-correction bit error rate of the service optical signal reaches a set value. Optionally, the slope threshold is less than or equal to the slope corresponding to when the post-correction bit error rate of the service optical signal reaches the set value.

[0137] For example, when the optical power is the peak optical power, this increase is equal to the product of the rising edge duration of the detected optical signal and the slope threshold, minus the optical power of the detected optical signal. In practice, the absolute values ​​of the rising edge slope and the falling edge slope are usually equal; therefore, this increase can be determined in a similar manner based on the slope of the falling edge of the detected optical signal. Using this method to determine the increase in the optical power of the detected optical signal allows for rapid adjustment of the detected optical signal, improving efficiency.

[0138] Method 2: Following the steps in step 1, increase the optical power of the detected optical signal.

[0139] In this second method, the first step length is used as the increase value of the optical power of the detected optical signal. The adjustment method is simple and easy to implement.

[0140] In some examples, the first step length can be a fixed value. For example, the fixed value can range from 0.1dB to 1dB. For instance, the fixed values ​​are 0.1dB, 0.2dB, 0.5dB, etc.

[0141] In other examples, the first step length can be the product of the optical power of the detected optical signal and a set ratio. The set ratio can be set according to actual needs, and it is greater than 0 and less than 50%. For example, it can be 5%, 10%, etc.

[0142] Ways to reduce the optical power of the detected optical signal:

[0143] Method 1: Reduce the optical power of the detection optical signal based on the slope of the rising or falling edge of the detection optical signal.

[0144] For example, when the optical power is the peak optical power, the reduction value is equal to the optical power of the detected optical signal minus the product of the rising edge duration and the slope threshold of the detected optical signal. In implementation, the absolute values ​​of the rising edge slope and the falling edge slope are usually equal; therefore, the increase value can be determined based on the slope of the falling edge of the detected optical signal in a similar manner. Using this method to determine the increase value of the optical power of the detected optical signal allows for rapid adjustment of the detected optical signal, improving efficiency.

[0145] Method 2: Following the second step, reduce the optical power of the detected optical signal.

[0146] In this second method, the second step size is used as the reduction value of the optical power of the detected optical signal. The adjustment method is simple and easy to implement.

[0147] In some examples, the second step size can be a fixed value, which, for example, can range from 0.1 dB to 1 dB. For instance, the fixed value could be 0.1 dB, 0.2 dB, 0.5 dB, etc.

[0148] In other examples, the second step size can be the product of the optical power of the detected optical signal and a set ratio. The set ratio can be set according to actual needs, and it is greater than 0 and less than 50%. For example, it can be 5%, 10%, etc.

[0149] Optionally, the second step length may be equal to or different from the first step length.

[0150] Optionally, if the bit error rate performance parameters still fail to meet the requirements after adjusting the optical power of the detection optical signal according to the aforementioned increase or decrease values, the optical power of the detection optical signal can be adjusted in steps until the bit error rate performance parameters meet the requirements.

[0151] For example, in the first possible implementation described above, after adjusting the optical power of the detection optical signal according to the aforementioned increase value, if the first condition is met, it indicates that the bit error rate performance parameter meets the requirements; if the second condition is met, the power of the detection optical signal is increased by the first step length; if the third or fourth condition is met, the power of the detection optical signal is decreased by the second step length.

[0152] For example, in the second possible implementation described above, after adjusting the optical power of the detection optical signal according to the aforementioned increase value, if the first condition is met, it means that the bit error rate performance parameter meets the requirements; if the second condition is met, the power of the detection optical signal is increased according to the first step length; if the third condition is met, the power of the detection optical signal is decreased according to the second step length.

[0153] For example, in the third possible implementation described above, after adjusting the optical power of the detection optical signal according to the aforementioned increase value, if the first condition is met, it means that the bit error rate performance parameter meets the requirements; if the second condition is met, the power of the detection optical signal is increased according to the first step length; if the third condition is met, the power of the detection optical signal is decreased according to the second step length.

[0154] In the embodiments of this application, the slope of the rising edge is equal to the peak optical power divided by the duration of the rising edge. When the duration of the rising edge remains unchanged, an increase in the peak optical power means an increase in the slope of the rising edge, and a decrease in the peak optical power means a decrease in the slope of the rising edge.

[0155] It should be noted that in the aforementioned possible implementations, the optical power refers to the peak optical power. In other embodiments, the optical power can also be the average optical power. For pulsed optical signals, the average optical power can be calculated based on the peak optical power, pulse width, and pulse period. For example, the average optical power is equal to the product of the peak optical power and the pulse width divided by the pulse period. The length of the pulse period is equal to the sum of the pulse width and the interval between two adjacent pulses. Therefore, the average optical power can also be adjusted.

[0156] Optionally, the method further includes: determining the initial parameters of the detection optical signal based on the wavelength relationship between the service optical signal and the detection optical signal.

[0157] For example, the monitoring device may pre-set two sets of initial parameters. The two sets contain parameters of the same type, but at least two parameters of the same type have different values. For instance, both sets may include initial optical power and pulse width, but the initial optical power in the two sets may differ. Optionally, the initial optical power may be either peak optical power or average optical power.

[0158] Assume two sets of initial parameters: a first set and a second set. When the wavelength of the detected optical signal is less than the maximum wavelength of the service optical signal, the first set of initial parameters is used; when the wavelength of the detected optical signal is greater than the maximum wavelength of the service optical signal, the second set of initial parameters is used.

[0159] Due to the effect of stimulated Raman scattering (SRS), when the wavelength of the detection optical signal is greater than the maximum wavelength of the service optical signal, some energy of the service optical signal will be transferred to the detection optical signal during co-fiber transmission. Conversely, when the wavelength of the detection optical signal is less than the minimum wavelength of the service optical signal, some energy of the detection optical signal will be transferred to the service optical signal during co-fiber transmission. Therefore, the initial optical power in the first set of initial parameters is greater than the initial optical power in the second set of initial parameters to ensure that the detection distance of the detection optical signal is comparable under the initial configuration.

[0160] For example, the initial optical power can be determined based on a reference optical power, where the reference optical power is the optical power that can cover the detection distance when the detection optical signal is transmitted alone in the optical fiber link. The detection distance can be set according to actual needs; for example, in a metropolitan area data center interconnection scenario, the detection distance can be 80km-120km.

[0161] Optionally, the initial optical power in the first set of initial parameters is equal to the reference optical power minus a compensation value, which is used to offset the energy transferred from the service optical signal to the detection optical signal. The initial optical power in the second set of initial parameters is equal to the reference optical power plus a compensation value, which is also used to offset the energy transferred from the detection optical signal to the service optical signal. This compensation value can be determined based on the total power of the service optical signal. In implementation, a mapping relationship between the compensation value and the total power of the service optical signal can be established in advance, and then the initial optical power can be determined using the compensation value corresponding to the current total power of the service optical signal.

[0162] In this embodiment, the transmission performance parameter is described as an example of the bit error rate performance parameter. In other embodiments, the transmission performance parameter may also be a nonlinear cost, a SOP change rate, or a phase change rate. Exemplarily, the SOP change rate of the service optical signal can be obtained using a polarization state tester or a polarization state analyzer. In some embodiments, the phase information of the service optical signal can be obtained first using a testing device (e.g., a spectrometer or oscilloscope), and then the phase change rate can be calculated based on the obtained phase information. In some embodiments, the phase change rate can be obtained using a circuit module integrated in the optical module of the second optical communication device or the control unit of the second optical communication device. Here, the optical module can be a coherent optical module, which coherently receives the service optical signal to obtain its phase information, and then calculates the phase change rate of the service optical signal based on the phase information.

[0163] When the transmission performance parameters include nonlinear cost, the detection optical signal can be adjusted in the following ways: when the nonlinear cost is less than the first cost threshold, increase the optical power of the detection optical signal; when the nonlinear cost is greater than the first cost threshold but less than the second cost threshold, keep the optical power of the detection optical signal unchanged; when the nonlinear cost is greater than the second cost threshold, decrease the optical power of the detection optical signal.

[0164] When the transmission performance parameters include the SOP change rate, the detection optical signal can be adjusted in the following ways: when the SOP change rate is less than the first rate threshold, increase the optical power of the detection optical signal; when the SOP change rate is greater than the first rate threshold and less than the second rate threshold, keep the optical power of the detection optical signal unchanged; when the SOP change rate is greater than the second rate threshold, decrease the optical power of the detection optical signal.

[0165] The first rate threshold is less than the second rate threshold. The first and second rate thresholds can be set based on system performance, and this application embodiment does not impose any limitations on this.

[0166] When the transmission performance parameters include the phase change rate, the detection optical signal can be adjusted in the following ways: when the phase change rate is less than the third rate threshold, increase the optical power of the detection optical signal; when the phase change rate is greater than the third rate threshold but less than the fourth rate threshold, keep the optical power of the detection optical signal unchanged; when the phase change rate is greater than the fourth rate threshold, decrease the optical power of the detection optical signal.

[0167] The third rate threshold is less than the fourth rate threshold. The third and fourth rate thresholds can be set based on system performance, and this application embodiment does not impose any restrictions on this.

[0168] The aforementioned transmission performance parameters can also be used in combination. For example, transmission performance parameters may include at least two of the following: nonlinear cost, SOP change rate, and phase change rate.

[0169] When the transmission performance parameters include the phase change rate and the SOP change rate, the detection optical signal can be adjusted in the following ways: when the SOP change rate is less than the first rate threshold and the phase change rate is less than the third rate threshold, increase the optical power of the detection optical signal; when the SOP change rate is greater than the first rate threshold and less than the second rate threshold, and the phase change rate is less than the fourth rate threshold, or when the SOP change rate is less than the second rate threshold, the phase change rate is greater than the third rate threshold and less than the fourth rate threshold, keep the optical power of the detection optical signal unchanged; when the SOP change rate is greater than the second rate threshold, or the phase change rate is greater than the fourth rate threshold, decrease the optical power of the detection optical signal.

[0170] Figure 4 This is a schematic diagram of the structure of a light signal detection adjustment device provided in an embodiment of this application. Figure 4 As shown, the adjustment device 400 includes an acquisition module 401 and an adjustment module 402. The acquisition module 401 is used to acquire the transmission performance parameters of the service optical signal; the adjustment module 402 is used to adjust the detection optical signal according to the transmission performance parameters. The detection optical signal and the service optical signal are transmitted in the same optical fiber.

[0171] Optionally, the detected optical signal is a pulsed optical signal, and the adjustment module 402 is used to adjust one or more of the following parameters of the pulsed optical signal: average optical power, peak optical power, pulse period, pulse width, slope of rising edge, and slope of falling edge.

[0172] Optionally, the transmission performance parameters include bit error rate performance parameters, and the adjustment module 402 is used to adjust the detection optical signal according to the bit error rate performance parameters to change the slope of the rising edge and / or the slope of the falling edge of the detection optical signal.

[0173] In one possible implementation, the bit error performance parameters include pre-correction bit error performance parameters and post-correction bit error performance parameters. The adjustment module 402 is configured to: increase the optical power of the detected optical signal when the pre-correction bit error performance parameter is less than a first pre-correction bit error threshold and the post-correction bit error performance parameter is less than the first post-correction bit error threshold; or maintain the optical power of the detected optical signal unchanged when the pre-correction bit error performance parameter is greater than the first pre-correction bit error threshold and less than a second pre-correction bit error threshold, and the post-correction bit error performance parameter is greater than the first post-correction bit error threshold and less than the second post-correction bit error threshold; or decrease the optical power of the detected optical signal when the pre-correction bit error performance parameter is greater than the second pre-correction bit error threshold and the post-correction bit error performance parameter is greater than the second post-correction bit error threshold; or decrease the optical power of the detected optical signal when the pre-correction bit error performance parameter is greater than the second pre-correction bit error threshold and the post-correction bit error performance parameter is less than the second post-correction bit error threshold.

[0174] In another possible implementation, the bit error rate performance parameter is a post-correction bit error rate performance parameter. The adjustment module 402 is configured to increase the optical power of the detected optical signal when the post-correction bit error rate performance parameter is less than a third post-correction bit error rate threshold; or, when the post-correction bit error rate performance parameter is greater than the third post-correction bit error rate threshold and less than a fourth post-correction bit error rate threshold, maintain the optical power of the detected optical signal unchanged; or, when the post-correction bit error rate performance parameter is greater than the fourth post-correction bit error rate threshold, decrease the optical power of the detected optical signal.

[0175] Optionally, the adjustment module 402 is used to increase the optical power of the detection optical signal in the following ways: increasing the optical power of the detection optical signal according to the slope of the rising edge or the slope of the falling edge of the detection optical signal; or, increasing the optical power of the detection optical signal according to the first step length.

[0176] Optionally, the adjustment module 402 is used to reduce the optical power of the detection optical signal in the following manner: reducing the optical power of the detection optical signal according to the slope of the rising edge or the slope of the falling edge of the detection optical signal; or, reducing the optical power of the detection optical signal according to a second step size.

[0177] Optionally, the device further includes a monitoring module 403. The monitoring module 403 is used to monitor changes in the configuration of the service optical signal. The acquisition module 401 is used to acquire the transmission performance parameters of the service optical signal when the monitoring module 403 detects a change in the configuration of the service optical signal.

[0178] It should be noted that the above embodiments of the optical signal adjustment device are only illustrated by the division of the functional modules described above. In practical applications, the functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. Furthermore, the optical signal adjustment device and the optical signal adjustment method embodiments provided above belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0179] The descriptions of the processes corresponding to the above-mentioned figures each have their own emphasis. For parts of a process that are not described in detail, please refer to the relevant descriptions of other processes.

[0180] This application also provides a computer device 500. For example... Figure 5 As shown, the computer device 500 includes a bus 502, a processor 504, a memory 506, and a communication interface 508. The processor 504, the memory 506, and the communication interface 508 communicate with each other via the bus 502. It should be understood that this application does not limit the number of processors and memories in the computer device 500.

[0181] Bus 502 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 The bus 502 may be represented by a single line, but this does not mean that there is only one bus or one type of bus. The bus 502 may include a path for transmitting information between various components of the computer device 500 (e.g., memory 506, processor 504, communication interface 508).

[0182] Processor 504 may include any one or more processors such as a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0183] Memory 506 may include volatile memory, such as random access memory (RAM). Processor 504 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0184] The memory 506 stores executable program code, and the processor 504 executes this executable program code to implement the functions of the aforementioned modules, thereby realizing the method for regulating the detected optical signal. That is, the memory 506 stores instructions for executing the method for regulating the detected optical signal.

[0185] The communication interface 508 uses transceiver modules, such as, but not limited to, network interface cards and transceivers, to enable communication between the computer device 500 and other devices or communication networks.

[0186] This application also provides a computer program product containing instructions. The computer program product may be software or program products containing instructions, capable of running on a computer device or stored on any usable medium. When the computer program product is run on at least one computer device, it causes the at least one computer device to perform the aforementioned method for regulating the detection of optical signals.

[0187] This application also provides a computer-readable storage medium. The computer-readable storage medium can be any available medium that a computer device can store, or a data storage device such as a data center containing one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive). The computer-readable storage medium includes instructions that instruct a computer device to perform the aforementioned method for regulating the detection of optical signals.

[0188] This application also provides a chip. The chip includes a processor and a communication interface, the communication interface being connected to the processor; the processor is used to execute instructions to cause the chip to perform the aforementioned method for regulating the detection optical signal.

[0189] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The “multiple” mentioned in the embodiments of this application refers to two or more. A and / or B indicate three possibilities: A; B; and A and B.

[0190] The above is merely one embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for regulating the detection of optical signals, characterized in that, The method includes: Obtain the transmission performance parameters of the service optical signal; The detection optical signal is adjusted according to the transmission performance parameters, wherein the detection optical signal and the service optical signal are transmitted in the same optical fiber.

2. The method according to claim 1, characterized in that, The detection optical signal is a pulsed optical signal, and the adjustment of the detection optical signal includes: One or more of the following parameters of the pulsed optical signal are adjusted: average optical power, peak optical power, pulse period, pulse width, rising edge slope, and falling edge slope.

3. The method according to claim 1 or 2, characterized in that, The transmission performance parameters include one or more of the following: bit error rate performance parameters, polarization state change rate of the service optical signal, phase change rate, and nonlinear cost.

4. The method according to any one of claims 1 to 3, characterized in that, The transmission performance parameters include error rate performance parameters. The step of adjusting the detection optical signal according to the transmission performance parameters includes: Based on the bit error rate performance parameters, the detection optical signal is adjusted to change the slope of the rising edge and / or the slope of the falling edge of the detection optical signal.

5. The method according to claim 4, characterized in that, The error performance parameters include pre-correction error performance parameters and post-correction error performance parameters; The step of adjusting the optical power of the detected optical signal according to the bit error rate performance parameters includes: When the pre-correction error performance parameter is less than the first pre-correction error threshold, and the post-correction error performance parameter is less than the first post-correction error threshold, increase the optical power of the detected optical signal; or, When the pre-correction error performance parameter is greater than the first pre-correction error threshold and less than the second pre-correction error threshold, and the post-correction error performance parameter is greater than the first post-correction error threshold and less than the second post-correction error threshold, the optical power of the detected optical signal remains unchanged. or, When the pre-correction error performance parameter is greater than the second pre-correction error threshold, and the post-correction error performance parameter is greater than the second post-correction error threshold, the optical power of the detected optical signal is reduced; or, When the pre-correction error performance parameter is greater than the second pre-correction error threshold and the post-correction error performance parameter is less than the second post-correction error threshold, the optical power of the detected optical signal is reduced.

6. The method according to claim 4, characterized in that, The error performance parameter is the post-correction error performance parameter; The step of adjusting the optical power of the detected optical signal according to the bit error rate performance parameters includes: When the post-correction error performance parameter is less than the third post-correction error threshold, increase the optical power of the detected optical signal; or... When the post-correction error performance parameter is greater than the third post-correction error threshold and less than the fourth post-correction error threshold, the optical power of the detected optical signal remains unchanged; or... When the post-correction error performance parameter is greater than the fourth post-correction error threshold, the optical power of the detected optical signal is reduced.

7. The method according to claim 5 or 6, characterized in that, Increasing the optical power of the detected optical signal includes: Increase the optical power of the detection optical signal based on the slope of its rising edge or falling edge; or, Following the first step, increase the optical power of the detected optical signal.

8. The method according to claim 5 or 6, characterized in that, The reduction of the optical power of the detected optical signal includes: The optical power of the detected optical signal is reduced based on the slope of its rising or falling edge; or, According to the second step, reduce the optical power of the detected optical signal.

9. The method according to any one of claims 1 to 8, characterized in that, The method further includes: Monitor changes in the configuration of the service optical signals; The acquisition of transmission performance parameters for the service optical signal includes: When the configuration of the service optical signal changes, the transmission performance parameters of the service optical signal are obtained.

10. A modulation device for detecting optical signals, characterized in that, include: The acquisition module is used to acquire the transmission performance parameters of the service optical signal; An adjustment module is used to adjust the detection optical signal according to the transmission performance parameters, wherein the detection optical signal and the service optical signal are transmitted in the same optical fiber.

11. The apparatus according to claim 10, characterized in that, The detected optical signal is a pulsed optical signal, and the adjustment module is used to adjust one or more of the following parameters of the pulsed optical signal: average optical power, peak optical power, pulse period, pulse width, rising edge slope, and falling edge slope.

12. The apparatus according to claim 10 or 11, characterized in that, The transmission performance parameters include one or more of the following: bit error rate performance parameters, polarization state change rate of the service optical signal, phase change rate, and nonlinear cost.

13. The apparatus according to any one of claims 10 to 12, characterized in that, The transmission performance parameters include bit error rate performance parameters. The adjustment module is used to adjust the detection optical signal according to the bit error rate performance parameters to change the slope of the rising edge and / or the slope of the falling edge of the detection optical signal.

14. The apparatus according to claim 13, characterized in that, The bit error performance parameters include pre-correction bit error performance parameters and post-correction bit error performance parameters; the adjustment module is used to, When the pre-correction error performance parameter is less than the first pre-correction error threshold, and the post-correction error performance parameter is less than the first post-correction error threshold, increase the optical power of the detected optical signal; or, When the pre-correction error performance parameter is greater than the first pre-correction error threshold and less than the second pre-correction error threshold, and the post-correction error performance parameter is greater than the first post-correction error threshold and less than the second post-correction error threshold, the optical power of the detected optical signal remains unchanged. or, When the pre-correction error performance parameter is greater than the second pre-correction error threshold, and the post-correction error performance parameter is greater than the second post-correction error threshold, the optical power of the detected optical signal is reduced; or, When the pre-correction error performance parameter is greater than the second pre-correction error threshold and the post-correction error performance parameter is less than the second post-correction error threshold, the optical power of the detected optical signal is reduced.

15. The apparatus according to claim 13, characterized in that, The bit error performance parameters include post-correction bit error performance parameters; the adjustment module is used for, When the post-correction error performance parameter is less than the third post-correction error threshold, increase the optical power of the detected optical signal; or... When the post-correction error performance parameter is greater than the third post-correction error threshold and less than the fourth post-correction error threshold, the optical power of the detected optical signal remains unchanged; or, When the post-correction error performance parameter is greater than the fourth post-correction error threshold, the optical power of the detected optical signal is reduced.

16. The apparatus according to claim 14 or 15, characterized in that, The adjustment module is used to increase the optical power of the detected optical signal in the following manner: Increase the optical power of the detection optical signal based on the slope of its rising edge or falling edge; or, Following the first step, increase the optical power of the detected optical signal.

17. The apparatus according to claim 14 or 15, characterized in that, The adjustment module is used to reduce the optical power of the detected optical signal in the following manner: The optical power of the detected optical signal is reduced based on the slope of its rising or falling edge; or, According to the second step, reduce the optical power of the detected optical signal.

18. The apparatus according to any one of claims 10 to 17, characterized in that, The device further includes: A monitoring module is used to monitor changes in the configuration of the service optical signal; The acquisition module is used to acquire the transmission performance parameters of the service optical signal when the configuration of the service optical signal changes.

19. An optical communication system, characterized in that, include: The system comprises a first optical communication device, a second optical communication device, and a monitoring device, wherein the first optical communication device and the second optical communication device are connected via an optical fiber link, the first optical communication device is used to send service optical signals to the second optical communication device through the optical fiber link, and the monitoring device is used to transmit detection optical signals through the optical fiber link. The monitoring device, the first optical communication device, or the second optical communication device is used to implement the method as described in any one of claims 1 to 9.

20. A computer device, characterized in that, The method includes a processor and a memory, wherein the memory stores program code; the processor is configured to read and execute the program code stored in the memory to implement the method as described in any one of claims 1 to 9.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a software program that, when read and executed by one or more processors, can implement the method as described in any one of claims 1 to 9.

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