A power adjustment method and apparatus, an electronic device, and a storage medium

Abstract

The application discloses a power adjustment method and device, electronic equipment and storage medium, relates to the field of communication technology, and is used for improving the problem of poor receiving power flatness of a wavelength division system caused by stimulated Raman scattering (SRS). The method comprises the following steps: acquiring an optical signal transmitted in an optical transmission link; starting from the last span of the optical transmission link, acquiring, for each span, input power of the optical signal without being affected by SRS and taking the input power as output power of the previous span under the influence of SRS; thereafter, for the case under the influence of SRS: obtaining input power of the previous span according to a first preset algorithm and the output power of the previous span; adjusting an erbium-doped optical transmission link amplifier (EDFA) optical launch parameter of the span, and adjusting the input power of the span to be the output power of the previous span; adjusting the EDFA optical launch parameter until the optical signal-to-noise ratio of each span is adjusted to a corresponding preset signal-to-noise ratio; and acquiring the input power of the first span and taking the input power as target transmitting optical power.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a power regulation method, apparatus, electronic device and storage medium. Background Technology

[0002] Before a wavelength division multiplexing (WDM) system can be commercially deployed, it is necessary to plan and design the WDM system, such as debugging the operating environment of the WDM system, which is called commissioning.

[0003] During the initial setup, the unevenness of the received power caused by stimulated Raman scattering (SRS) can be compensated by directly adjusting the target transmitted light power and the gain of the erbium-doped fiber amplifier (EDFA).

[0004] However, for C+L band wavelength division multiplexing systems, a maximum of 192 channels can be achieved, and the configuration process is very complex. This method is inefficient in adjusting the target transmit optical power and the optical amplifier parameters of the EDFA, which increases the difficulty of operation and maintenance. Summary of the Invention

[0005] This application provides a power regulation method, apparatus, electronic device, and storage medium for improving the poor power flatness of the received power at the receiver of a wavelength division multiplexing (WDM) system caused by the SRS effect.

[0006] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a power adjustment method, comprising: acquiring an optical signal transmitted in an optical transmission link; the optical transmission link comprising at least one segment; starting from the last segment of the at least one segment, for each segment, acquiring the input power of the optical signal transmitted in the segment before being affected by the stimulated Raman scattering (SRS) effect, and using the input power as the output power of the optical signal transmitted in the preceding segment under the influence of the SRS effect; obtaining the input power of the optical signal under the influence of the SRS effect when it is transmitted in the preceding segment, based on a first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it is transmitted in the preceding segment; and adjusting the power of the corresponding segment under the influence of the SRS effect. The optical amplifier parameters of the erbium-doped fiber amplifier (EDFA) are adjusted to the output power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the previous span, based on the input power of the optical signal under the influence of the SRS effect during transmission in each span. The optical signal-to-noise ratio (SNR) corresponding to the input power of the optical signal under the influence of the SRS effect during transmission in each span is obtained. The optical amplifier parameters of the EDFA corresponding to each span in at least one span are adjusted to the corresponding preset SNR for each span. The input power of the optical signal under the influence of the SRS effect during transmission in the first span is obtained and used as the target transmitted optical power.

[0007] Optionally, for each segment, the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in the segment is obtained; according to the second preset algorithm and the optical SNR corresponding to each segment, the preset SNR corresponding to each segment is obtained; the minimum value of the sum of the preset SNR corresponding to each segment is greater than the preset power threshold, and the difference between the maximum value and the minimum value of the sum of the preset SNR corresponding to each segment is less than the preset difference.

[0008] Optional optical amplifier parameters for the EDFA include: the gain and / or gain slope of the EDFA.

[0009] Optionally, the first preset algorithm is the SRS inversion formula, and the second preset algorithm is the gradient ascent algorithm.

[0010] Secondly, this application provides a power regulation device, comprising: An acquisition module is used to acquire the optical signal transmitted in the optical transmission link; the optical transmission link includes at least one span; starting from the last span in the at least one span, for each span, the input power of the optical signal transmitted in the span without the influence of stimulated Raman scattering (SRS) effect is acquired, and the input power is used as the output power of the optical signal transmitted in the previous span under the influence of the SRS effect; according to a first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it was transmitted in the previous span, the input power of the optical signal under the influence of the SRS effect when it was transmitted in the previous span is obtained.

[0011] The adjustment module is used to adjust the optical amplifier parameters of the erbium-doped fiber amplifier (EDFA) corresponding to each span under the influence of the SRS effect, adjusting the input power of the optical signal transmitted in the span under the influence of the SRS effect to the output power of the optical signal transmitted in the previous span under the influence of the SRS effect; acquiring the optical signal-to-noise ratio (SNR) corresponding to the input power of the optical signal transmitted in each span under the influence of the SRS effect; adjusting the optical amplifier parameters of the EDFA corresponding to each span in at least one span, adjusting the optical SNR of each span to the corresponding preset SNR; acquiring the input power of the optical signal transmitted in the first span under the influence of the SRS effect, and using the input power of the optical signal transmitted in the first span under the influence of the SRS effect as the target transmitted optical power.

[0012] Optionally, the adjustment module is further configured to, for each of the segments, obtain the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in the segment; obtain a preset SNR corresponding to each segment according to the second preset algorithm and the optical SNR corresponding to each segment; the minimum value of the sum of the preset SNRs corresponding to each segment is greater than a preset power threshold, and the difference between the maximum and minimum values ​​of the sum of the preset SNRs corresponding to each segment is less than a preset difference.

[0013] Thirdly, an electronic device is provided, comprising: a memory and a processor; the memory is used to store computer-executed instructions; when the electronic device is in operation, the processor executes the computer-executed instructions stored in the memory to cause the electronic device to perform the power regulation method as described in the first aspect and any of its implementations.

[0014] Fourthly, a computer-readable storage medium is provided, comprising: computer-executable instructions that, when executed on a computer, cause the computer to perform a power regulation method as described in the first aspect and any of its implementations.

[0015] For a detailed description of the second to fourth aspects and their various implementations in this application, please refer to the detailed description in the first aspect and its various implementations; and for a detailed description of the beneficial effects of the second to fourth aspects and their various implementations, please refer to the beneficial effect analysis in the first aspect and its various implementations, which will not be repeated here.

[0016] These or other aspects of this application will become more readily apparent in the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a wavelength division multiplexing (WDM) system provided in an embodiment of this application; Figure 2 A schematic flowchart of a power regulation method provided in an embodiment of this application; Figure 3 A schematic diagram of a power spectrum unaffected by stimulated Raman scattering, provided for an embodiment of this application; Figure 4 A schematic diagram of a power spectrum affected by stimulated Raman scattering, provided for an embodiment of this application; Figure 5 This application provides an illustration of a power regulation method. Figure 1 ; Figure 6 A schematic diagram of a power regulation method provided in this application embodiment. Figure 2 ; Figure 7 This is a schematic diagram of the structure of a power regulation device provided in an embodiment of this application; Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The words "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences. It should be noted that in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations.

[0021] It should be noted that any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0022] Commonly used optical bands in fiber optic communication include the C-band and L-band. The C-band typically transmits optical wavelengths from 1530nm to 1565nm. Due to its lower signal loss, the C-band is the most commonly used band and is widely used in metropolitan area networks, long-distance and ultra-long-distance transmissions, as well as submarine optical cable systems.

[0023] Band extension technology, based on dense wavelength division multiplexing (DWDM) technology, expands the available transmission bandwidth beyond the C-band spectrum, increasing the number of channels for co-fiber transmission and thus improving single-fiber transmission capacity. Furthermore, building upon C-band DWDM, in the past two years, Chinese equipment manufacturers and operators have spearheaded the extension of the Super C-band (C6T). The Super C-band bandwidth can reach 6THz, and it has been successfully implemented with an 80-wavelength, 75GHz spacing 200GQPSK solution.

[0024] A wavelength division multiplexing (WDM) system is a long-distance optical transmission link communication system that utilizes DWDM technology. It includes a transmitter, an optical transmission link, and a receiver. In a C-band WDM system, the original signal is modulated at the transmitter and transmitted via C-band optical signals, with the original signal recovered at the receiver. In C+L band WDM systems, the short-wavelength relative stability (SRS) effect causes optical power to shift from shortwave to longwavelength, affecting the received power at the receiver and disrupting the flatness of the optical signal-to-noise ratio (OSNR). Without power adjustment, the strong power shift caused by the SRS effect severely degrades the single-wavelength power flatness at the receiver, failing to meet application requirements. Furthermore, the power shift phenomenon caused by the SRS effect becomes increasingly significant with increased channel bandwidth, higher transmit power, and longer transmission bands.

[0025] In related technologies, the target transmit optical power of C-band and L-band and the optical amplifier parameters of EDFA can be manually configured, thereby alleviating the problem of OSNR degradation at the receiver caused by C+L band wavelength division multiplexing system during transmission due to C-band optical power loss caused by SRS effect.

[0026] However, since the number of channels increases after the wavelength division multiplexing (WDM) system is extended from the C-band to the C+L-band, it can reach up to 192 channels with a channel frequency interval of 50 GHz. The configuration process is very complicated, which increases the difficulty of manual configuration and maintenance.

[0027] To address the aforementioned problems, this application provides a power adjustment method. The method involves acquiring an optical signal transmitted in an optical transmission link; the optical transmission link includes at least one span; starting from the last span in the at least one span, for each span, acquiring the input power of the optical signal transmitted in that span before the influence of stimulated Raman scattering (SRS) effect, and using this input power as the output power of the optical signal transmitted in the preceding span under the influence of the SRS effect; obtaining the input power of the optical signal under the influence of the SRS effect when transmitted in the preceding span, based on a first preset algorithm and the output power of the optical signal under the influence of the SRS effect during transmission in the preceding span; and under the influence of the SRS effect... The EDFA optical amplifier parameters corresponding to each span are adjusted to adjust the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the span to the output power under the influence of the SRS effect when the optical signal is transmitted in the previous span. The optical signal-to-noise ratio (SNR) corresponding to the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in each span is obtained. The optical amplifier parameters of the EDFA corresponding to each span in at least one span are adjusted to adjust the optical SNR of each span to the corresponding preset SNR. The input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the first span is obtained, and the input power of the optical signal under the influence of the SRS when the optical signal is transmitted in the first span is used as the target transmitted optical power.

[0028] As can be seen from the above, in the scheme of this application embodiment, the input power of each segment is adjusted sequentially starting from the last segment in the optical transmission link. By adjusting the optical amplifier parameters of the EDFA corresponding to each segment, a flat optical signal-to-noise ratio and target transmitted optical power are finally obtained. This improves the efficiency of adjusting the target transmitted optical power while alleviating the poor flatness of the received power at the receiver of the C+L band wavelength division system caused by the SRS effect.

[0029] The method provided in this application embodiment can be applied to, for example, Figure 1 The wavelength division multiplexing (WDM) system shown includes a WDM platform 101 and a power conditioning device 102, which are connected via a logic interface.

[0030] The wavelength division multiplexing (WDM) platform 101 operates in the C+L band and includes a transmitter, an optical transmission link, and a receiver.

[0031] The transmitting end is used to combine at least two different wavelength optical carrier signals together via a multiplexer and couple them into a single optical fiber for transmission. The receiving end is used to separate the mixed wavelength optical carriers via a demultiplexer, and then the optical receiver performs further processing to recover the original signal.

[0032] The optical fiber transmission link includes at least one span, each span including optical fiber and EDFA. The first span in the at least one span is connected to the transmitting end at one end, and the last span in the at least one span is connected to the receiving end at one end. The other spans in the at least one span, except for the first and last spans, connect two intermediate stations in the optical transmission link. The intermediate stations are devices that act as relays in the optical transmission link.

[0033] In some embodiments, the power adjustment device 102 may be a device for adjusting the target transmitted optical power at the transmitting end of the wavelength division platform 101.

[0034] The power adjustment device 102 can start from the last segment of the optical transmission link, and for each segment, obtain the input power of the optical signal transmitted in the segment before the influence of the stimulated Raman scattering (SRS) effect, and use the input power as the output power of the optical signal transmitted in the previous segment under the influence of the SRS effect; according to the first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it was transmitted in the previous segment, obtain the input power of the optical signal under the influence of the SRS effect when it was transmitted in the previous segment; under the influence of the SRS effect, adjust the optical amplifier parameters of the EDFA corresponding to the segment to adjust the input power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment. During transmission, the input power under the influence of the SRS effect is adjusted to the output power under the influence of the SRS effect when the optical signal is transmitted in the previous segment. The optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in each segment is obtained. The optical amplifier parameters of the EDFA corresponding to each segment in at least one segment are adjusted to adjust the optical SNR corresponding to each segment to the corresponding preset SNR. The input power under the influence of the SRS effect when the optical signal is transmitted in the first segment is obtained, and the input power under the influence of the SRS effect when the optical signal is transmitted in the first segment is used as the target transmitted optical power.

[0035] In some embodiments, the power adjustment device 102 can also be a system for dynamically simulating the physical object of the wavelength division platform 101, used to simulate and evaluate the power adjustment method while other parameters are fixed. These other parameters include noise power and bandwidth, fiber length per span, attenuation, and nonlinear coefficient.

[0036] The power adjustment device 102 can simulate the optical transmission link under the conditions affected by the SRS effect and the conditions not affected by the SRS effect. By providing the wavelength division platform 101 with operation and maintenance, system prediction and improvement processes, it can improve the wavelength division platform, shorten the operation and maintenance cycle, and reduce the implementation or maintenance costs.

[0037] In some embodiments, see continue to see Figure 1The power regulation device 102 may include a data module and a regulation module.

[0038] The data module is used to acquire target data from the wavelength division platform 101. The target data includes the input power, output power, optical signal-to-noise ratio, EDFA optical amplifier parameters, noise figure, fiber length, nonlinear coefficient, attenuation, etc. of each segment of the optical transmission link of the wavelength division platform.

[0039] The adjustment module is used to calculate the optical amplifier parameters of the EDFA and the target transmitted optical power. For example, the adjustment module can calculate the optical signal-to-noise ratio of each segment based on the local optimum approximation global optimum algorithm and the gradient ascent algorithm, and calculate the optical amplifier parameters of the EDFA and the target transmitted optical power.

[0040] In some embodiments, the wavelength division multiplexing (WDM) system may also include a display platform for providing a graphical interface to the user and interacting with the user, such as issuing a task start command to the power adjustment device 102 in response to the user's operation, presenting evaluation results to the user, etc.

[0041] As can be seen from the above, in the scheme of this application embodiment, the input power of each segment is adjusted sequentially starting from the last segment in the optical transmission link. By adjusting the optical amplifier parameters of the EDFA corresponding to each segment, a flat optical signal-to-noise ratio and target transmitted optical power are finally obtained. This improves the efficiency of adjusting the target transmitted optical power while alleviating the poor flatness of the received power at the receiver of the C+L band wavelength division system caused by the SRS effect.

[0042] This application provides a power regulation method. This method can be applied to electronic devices with computing and processing capabilities, such as twin platforms, servers, and mainframes. Taking the application of this method to a twin platform as an example, see [link to example]. Figure 2 As shown, the method includes the following steps S201~S206.

[0043] S201. Acquire the optical signal transmitted in the optical transmission link.

[0044] In some embodiments, the power conditioning device acquires the combined wavelength band optical signal transmitted in the optical transmission link from the wavelength division platform. The optical transmission link is used for long-distance unidirectional transmission of the combined wavelength band optical signal, connecting the transmitter and receiver of the wavelength division system; the optical transmission link includes at least one span, with the span connected to the transmitter being the first span and the span connected to the receiver being the last span, and each span including an EDFA and an optical fiber.

[0045] Starting from the last segment of the optical transmission link, calculate the input power of each segment sequentially, and execute steps S202~S204. When the input power of the first segment is calculated, execute step S205.

[0046] S202. Obtain the input power of the optical signal transmitted in the span without the influence of the SRS effect, and take the above input power as the output power of the optical signal transmitted in the previous span under the influence of the SRS effect.

[0047] Among them, stimulated Raman scattering (SRS) is a nonlinear optical effect. When a combined band optical signal is transmitted in an optical transmission link, under the influence of the SRS effect, since the combined band optical signal has a flat power spectrum, after being transmitted through the optical transmission link, the optical power of the short wavelength optical signal is reduced and the optical power of the long wavelength optical signal is amplified. Therefore, a transfer of short wavelength optical power to long wavelength optical power will occur.

[0048] For example, Figure 3 The power spectrum of the optical signal before the SRS effect. Figure 4 The power spectrum of the optical signal under the influence of the SRS effect is shown, where, Figure 3 and Figure 4 The horizontal axis represents frequency f, the vertical axis represents power P, and the bandwidth is f0.

[0049] For example, it can begin from the last segment in the optical transmission link, that is, from the segment connected to the receiver of the wavelength division system, see [reference]. Figure 5 As shown, starting from segment n, the input power Pin_n of the optical signal transmitted in segment n without the influence of stimulated Raman scattering (SRS) effect is obtained, and Pin_n is taken as the output power Psrs_out_n-1 of the optical signal transmitted in segment n-1 under the influence of SRS effect.

[0050] Optionally, the wavelength division multiplexing (WDM) platform provides target data for scenarios without SRS effects and scenarios with SRS effects, respectively. The power conditioning device collects the input and output power for each segment corresponding to these two scenarios. The target data, except for the input power, output power, EDFA optical amplifier coefficient, and OSNR for each segment, is fixed. The target data includes the input power, output power, optical signal-to-noise ratio, EDFA optical amplifier parameters, noise figure, optical transmission link length, nonlinearity coefficient, and attenuation for each segment of the WDM platform's optical transmission link.

[0051] S203. Based on the first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment, the input power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment is obtained.

[0052] For example, see Figure 5When the optical signal is transmitted in the previous segment, the output power under the influence of the SRS effect can be Psrs_out_n-1. Based on Psrs_out_n-1, the input power Psrs_in_n-1 of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment can be obtained.

[0053] In some embodiments, the first preset algorithm can be the SRS inversion formula shown in formula (1).

[0054] (1) In the above formula (1), z is the transmission distance of the optical signal in the optical transmission link, and n is the channel number. Let n be the frequency of the optical signal corresponding to channel n. Let m be the frequency of the optical signal corresponding to channel m. The effective cross-sectional area of ​​the optical fiber in the optical transmission link. This is the attenuation coefficient of the optical fiber in the optical transmission link. is the Raman gain coefficient. This represents the output power of the optical signal corresponding to channel n through an optical fiber of length z under the influence of the SRS effect. Therefore, the output power is the power corresponding to z=0. Let be the input power of the optical signal before it passes through the optical fiber of length z in the optical transmission link.

[0055] S204. Under the influence of the SRS effect, adjust the optical amplifier parameters of the EDFA corresponding to the span, so that the input power of the optical signal under the influence of the SRS effect when it is transmitted in the span is adjusted to the output power under the influence of the SRS effect when the optical signal is transmitted in the previous span.

[0056] For example, see [link to previous article] Figure 5 Segment n is the segment closest to the receiver. Under the influence of the SRS effect, when the optical signal is transmitted in segment n, by adjusting the optical amplifier parameters of the EDFA corresponding to segment n, the input power Psrs_in_n of the optical signal under the influence of the SRS effect can be adjusted to the value of the input power Psrs_out_n-1 of the optical signal under the influence of the SRS effect when it is transmitted in segment n-1.

[0057] Furthermore, in order to ensure the continuity of input power and output power between adjacent segments in the optical transmission link, the input power Psrs_in_n of the optical signal under the influence of the SRS effect can be adjusted to the value of the input power Psrs_out_n-1 of the optical signal under the influence of the SRS effect when it is transmitted in segment n-1.

[0058] Next, the input power Psrs_in_n-2 of the preceding segment n-2 can be adjusted. Steps S202-S204 are repeated, adjusting the input power of each segment sequentially from back to front in the optical transmission link. This continues until segment 2 is calculated, at which point the input power Pin_2 of the optical signal transmitted in segment 2, excluding the influence of stimulated Raman scattering (SRS). Segment 2 is the next segment after segment 1, and segment 1 is the segment closest to the transmitter. The value of Pin_2 is taken as the output power Psrs_out_1 of the optical signal transmitted in segment 1 under the influence of SRS. Based on Psrs_out_1 and the first preset algorithm, the input power Psrs_in_1 of the optical signal under the influence of SRS is obtained, thus acquiring the input power of the optical signal under the influence of SRS when transmitted in each segment.

[0059] S205. Obtain the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in each span; adjust the optical amplifier parameters of the EDFA corresponding to each span in at least one span, and adjust the optical SNR corresponding to each span to the corresponding preset SNR.

[0060] In some embodiments, the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect is obtained when the optical signal is transmitted in each segment. The corresponding output power can be changed by adjusting the gain and / or gain slope of the EDFA corresponding to each segment, thereby adjusting the optical SNR corresponding to each segment to the corresponding preset SNR.

[0061] In some embodiments, the preset signal-to-noise ratio can be obtained by the following method: For each segment, the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect during optical signal transmission within the segment is obtained. Based on the second preset algorithm and the SNR corresponding to each segment, the current SNR corresponding to the input power under the SRS effect is used as the initial value, and then iteratively performed until the output SNR of the optical transmission link reaches its maximum, obtaining the preset SNR corresponding to each segment. Furthermore, the minimum sum of the preset SNRs corresponding to each segment is greater than a preset power threshold, and the difference between the maximum and minimum sum of the preset SNRs corresponding to each segment is less than a preset difference. The second preset algorithm can be a gradient ascent algorithm.

[0062] In the above embodiments, target data is obtained from the wavelength division multiplexing (WDM) system. The target data includes the transmission length of each segment, optical transmission link attenuation and nonlinear coefficient, reference power, total transmission bandwidth, noise figure, etc. By adjusting the EDFA optical amplifier parameters corresponding to each segment, the beneficial effect of making the output signal-to-noise ratio of each segment optimal can be achieved. Since the output signal-to-noise ratio of the optical transmission link is the sum of the signal-to-noise ratios of each segment, the output signal-to-noise ratio of the optical transmission link is close to the optimal value.

[0063] Furthermore, due to the SRS effect, for each span, the output power undergoes a power transfer from a shorter wavelength to a longer wavelength compared to the input power, and this power transfer has a cumulative effect across spans. In the embodiments of the present invention, see... Figure 6 As shown, for each span, the slope of the output power spectrum of each span is adjusted by regulating the optical amplifier parameters of the corresponding EDFA. This flattens the power spectrum line that was tilted under the influence of the SRS effect, thus improving the output power flatness of each span compared to before power adjustment. Furthermore, since the optical signal-to-noise ratio (SNR) is positively correlated with the output power, the flatness of the SNR is also improved even when the target data for each span remains unchanged. Therefore, the flatness of the output SNR of the optical transmission link is optimized, i.e., the flatness of the receiver SNR of the wavelength division multiplexing (WDM) system is optimized. The target data includes the transmission length, fiber attenuation, nonlinear coefficient, noise reference power, total transmission bandwidth, and noise figure of each span.

[0064] S206. Obtain the input power of the optical signal under the influence of SRS when it is transmitted in the first span, and use the input power of the optical signal under the influence of SRS when it is transmitted in the first span as the target transmitted optical power.

[0065] In some embodiments, the input power of the optical signal under the influence of the SRS effect when it is transmitted in the first span is obtained, and the value of the input power is the target transmitted optical power of the wavelength division system.

[0066] As can be seen from the above, in the scheme of this application embodiment, the input power of each segment is adjusted sequentially starting from the last segment in the optical transmission link. By adjusting the optical amplifier parameters of the EDFA corresponding to each segment, a flat optical signal-to-noise ratio and target transmitted optical power are finally obtained. This improves the efficiency of adjusting the target transmitted optical power while alleviating the poor flatness of the received power at the receiver of the C+L band wavelength division system caused by the SRS effect.

[0067] Based on the Local Optimum Approximation Global Optimum (LOGO) algorithm, and considering the SRS effect, this method uses the transmission length, reference input power, total transmission bandwidth, and noise figure spectrum of each segment as inputs. By configuring the optical amplifier gain and gain slope of each segment in the link, the input power spectrum of each segment is changed, thereby optimizing the OSNR at the receiver and making the OSNR as flat as possible, enabling fast and accurate power adjustment. On the one hand, it uses feasible modeling methods to ensure power balance among channels in the C-band and L-band; on the other hand, it can quickly and accurately provide the configuration scheme that optimizes the performance of the wavelength division multiplexing (WDM) system, ensuring system stability and simplifying operation and maintenance. This can be used for optical transmission technology with band extension, which is of great significance for the network construction of WDM platforms and can also provide effective guidance in the application of long-distance high-speed transmission systems.

[0068] This application also provides a power regulation device, and a schematic diagram of the power regulation device is shown below. Figure 7 As shown, the power regulation device includes an acquisition module 701 and an regulation module 702.

[0069] The acquisition module 701 is used to acquire the optical signal transmitted in the optical transmission link; the optical transmission link includes at least one span; starting from the last span in the at least one span, for each span, the input power of the optical signal transmitted in the span without the influence of stimulated Raman scattering (SRS) effect is acquired, and the input power is used as the output power of the optical signal transmitted in the previous span under the influence of the SRS effect; according to the first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it was transmitted in the previous span, the input power of the optical signal under the influence of the SRS effect when it was transmitted in the previous span is obtained.

[0070] The adjustment module 702 is used to adjust the optical amplifier parameters of the EDFA corresponding to the span under the influence of the SRS effect, so that the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the span is adjusted to the output power under the influence of the SRS effect when the optical signal is transmitted in the previous span; to obtain the optical signal-to-noise ratio corresponding to the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in each span; to adjust the optical amplifier parameters of the EDFA corresponding to each span in at least one span, so that the optical signal-to-noise ratio corresponding to each span is adjusted to the corresponding preset signal-to-noise ratio; to obtain the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the first span, and to use the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the first span as the target transmitted optical power.

[0071] The adjustment module 702 is further configured to, for each of the segments, obtain the optical signal-to-noise ratio corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in the segment; obtain a preset signal-to-noise ratio corresponding to each segment according to the second preset algorithm and the optical signal-to-noise ratio corresponding to each segment respectively; the minimum value of the sum of the preset signal-to-noise ratios corresponding to each segment is greater than a preset power threshold, and the difference between the maximum value and the minimum value of the sum of the preset signal-to-noise ratios corresponding to each segment is less than a preset difference.

[0072] When implementing the power adjustment method in this application embodiment, on the one hand, it improves the power transfer problem caused by the SRS effect in the C+L band wavelength division multiplexing system. By adjusting the optical amplifier parameters of the EDFA corresponding to each segment multiple times, the received power flatness at the receiver is improved. Since the wavelength range of the C band is 1530~1565nm and the wavelength range of the L band is 1565nm~1625nm, the C band is more severely affected by the SRS effect than the L band. The effect of this application embodiment on the transmission of C-band and L-band optical signals in the wavelength division multiplexing system is different: for the C band, since OSNR is positively correlated with received power, the OSNR at short wavelengths in the C band is also improved; for the L band, under the premise that the OSNR at the receiver is basically unaffected, the target transmitted optical power can be significantly reduced, thereby keeping the nonlinear cost at a small level. In summary, the embodiments of this application improve the poor received power flatness and poor OSNR flatness caused by the SRS effect in C+L band wavelength division multiplexing systems by optimizing the target transmitted optical power, providing effective guidance for the application of band-extended optical transmission technology in long-distance high-speed systems.

[0073] On the other hand, since the C+L band wavelength division system can have up to 192 channels, the efficiency of adjusting the target transmitted optical power and the optical amplifier parameters of the EDFA is low and the configuration process is very complicated. Compared with the traditional method of adjusting the optical power of all channels contained in the optical signal, the scheme given in this application embodiment is more efficient in adjusting the target transmitted optical power.

[0074] The foregoing mainly describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, it includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0075] This application embodiment can divide the communication device into functional modules according to the above method example. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. Optionally, the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0076] Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application, such as... Figure 8As shown, the electronic device includes a processor 801 and a memory 802. Optionally, the electronic device may also include a bus 804; alternatively, the electronic device may also include a communication interface 803. The processor 801 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 801 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor 801 may also be a combination that implements computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc. The communication interface 803 is used to connect with other devices through a communication network. The communication network may be Ethernet, a wireless access network, a wireless local area network (WLAN), etc. The memory 802 can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or it can be an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. As one possible implementation, the memory 802 can exist independently of the processor 801. The memory 802 can be connected to the processor 801 via a bus 804 for storing instructions or program code. When the processor 801 calls and executes the instructions or program code stored in the memory 802, it can implement the power regulation method provided in this application embodiment. In another possible implementation, the memory 802 can also be integrated with the processor 801. The bus 804 can be an extended industry standard architecture (EISA) bus, etc. The 804 bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 8 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0077] Some embodiments of this application provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform the method as described in any of the above embodiments.

[0078] Exemplary examples of computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., electrically erasable programmable read-only memory (EEPROM), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0079] This application provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the method of any of the above embodiments.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power regulation method, characterized in that, The method includes: Acquire optical signals transmitted in an optical transmission link; the optical transmission link includes at least one span; Starting from the last segment of the at least one segment, the input power of each segment is adjusted sequentially from back to front. For each segment, the input power of the optical signal transmitted in the segment without the influence of stimulated Raman scattering (SRS) effect is obtained, and the input power is used as the output power of the optical signal transmitted in the previous segment under the influence of the SRS effect. Based on the first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment, the input power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment is obtained; Under the influence of the SRS effect, the optical amplifier parameters of the erbium-doped fiber amplifier (EDFA) corresponding to the span are adjusted so that the input power of the optical signal under the influence of the SRS effect when it is transmitted in the span is adjusted to the output power under the influence of the SRS effect when the optical signal is transmitted in the previous span of the span. The optical signal-to-noise ratio corresponding to the input power under the influence of the SRS effect is obtained when the optical signal is transmitted in each span. Adjust the optical amplifier parameters of the EDFA corresponding to each of the at least one spans, and adjust the optical signal-to-noise ratio of each span to the corresponding preset signal-to-noise ratio; For each of the aforementioned segments, the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect is obtained when the optical signal is transmitted in the segment; based on the second preset algorithm and the optical SNR corresponding to each of the aforementioned segments, a preset SNR corresponding to each segment is obtained; the minimum value of the sum of the preset SNRs corresponding to each of the aforementioned segments is greater than a preset power threshold, and the difference between the maximum value and the minimum value of the sum of the preset SNRs corresponding to each of the aforementioned segments is less than a preset difference; The input power of the optical signal under the influence of the SRS effect when it is transmitted in the first segment is obtained, and the input power of the optical signal under the influence of the SRS when it is transmitted in the first segment is taken as the target transmitted optical power.

2. The method according to claim 1, characterized in that, The optical amplifier parameters of the erbium-doped fiber amplifier (EDFA) include: the gain and / or gain slope of the EDFA.

3. The method according to claim 1, characterized in that, The first preset algorithm is the SRS inversion formula, and the second preset algorithm is the gradient ascent algorithm.

4. A power regulation device, characterized in that, include: An acquisition module is used to acquire optical signals transmitted in an optical transmission link; the optical transmission link includes at least one span. Starting from the last segment of the at least one segment, the input power of each segment is adjusted sequentially from back to front. For each segment, the input power of the optical signal transmitted in the segment without the influence of stimulated Raman scattering (SRS) is obtained, and the input power is used as the output power of the optical signal transmitted in the previous segment under the influence of the SRS effect. Based on the first preset algorithm and the output power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment, the input power of the optical signal under the influence of the SRS effect when it is transmitted in the previous segment is obtained. An adjustment module is configured to, under the influence of the SRS effect, adjust the optical amplifier parameters of the erbium-doped fiber amplifier (EDFA) corresponding to the span, adjust the input power of the optical signal transmitted in the span under the influence of the SRS effect to the output power of the optical signal transmitted in the previous span under the influence of the SRS effect; obtain the optical signal-to-noise ratio (SNR) corresponding to the input power of the optical signal transmitted in each span under the influence of the SRS effect; and adjust the optical amplifier parameters of the EDFA corresponding to each of the at least one spans, adjusting the optical SNR of each span to a corresponding preset SNR. The adjustment module is further configured to, for each segment, obtain the optical signal-to-noise ratio (SNR) corresponding to the input power under the influence of the SRS effect when the optical signal is transmitted in the segment; obtain a preset SNR corresponding to each segment according to the second preset algorithm and the optical SNR corresponding to each segment; the minimum value of the sum of the preset SNRs corresponding to each segment is greater than a preset power threshold, and the difference between the maximum value and the minimum value of the sum of the preset SNRs corresponding to each segment is less than a preset difference. The adjustment module is also used to obtain the input power of the optical signal under the influence of the SRS effect when the optical signal is transmitted in the first segment, and to use the input power of the optical signal under the influence of the SRS when the optical signal is transmitted in the first segment as the target transmitted optical power.

5. An electronic device, characterized in that, It includes a memory and a processor; the memory is used to store computer execution instructions; when the electronic device is running, the processor executes the computer execution instructions stored in the memory to cause the electronic device to perform the power regulation method as described in any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the power regulation method according to any one of claims 1-3.

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