Method for adjusting gain of raman amplifier, and storage medium, electronic apparatus and computer program product

Abstract

Provided in the embodiments of the present disclosure is a method for adjusting the gain of a Raman amplifier. The method comprises: on the basis of a first preset adjustment target, adjusting a DRA-P pumping configuration (S202); on the basis of an amplifier performance parameter of a receiving end and a second preset adjustment target for the OSNR of the receiving end, determining a third preset adjustment target at a preset virtual midpoint position (S204); on the basis of the third preset adjustment target, adjusting a transmitting end configuration of a transmitting end (S206); and measuring an actual OSNR of the receiving end, and when the actual OSNR does not meet the second preset adjustment target, performing cyclical fine tuning on the DRA-P pumping configuration and / or the transmitting end configuration until the actual OSNR meets the second preset adjustment target (S208).

Description

A method for adjusting gain of a Raman amplifier, a storage medium, an electronic device and a computer program product

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on Chinese Patent Application No. CN202410845491.3 entitled “A method for adjusting gain of a Raman amplifier, a storage medium, an electronic device and a computer program product” filed on June 27, 2024, and claiming priority to the same, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the field of communications, and in particular, to a method for adjusting gain of a Raman amplifier, a storage medium, an electronic device and a computer program product. BACKGROUND

[0004] In the field of optical transmission, with the rapid development of emerging businesses and applications such as 5G, AR / VR, computing power, the demand for network traffic has been growing at a high speed, and therefore, higher and higher requirements have been put forward for the transmission capacity of the transmission network. Restricted by the Shannon limit, the single-wavelength rate of Dense Wavelength Division Multiplexing (DWDM) systems is continuously developing from 100 Gb / s to 200 Gb / s, 400 Gb / s and 800 Gb / s and the like at a high speed, but under the condition of ensuring similar transmission performance, the spectral efficiency of Wavelength Division Multiplexing (WDM) systems cannot grow in proportion. In order to further improve the single-fiber transmission capacity, the industry uses C+L band systems to increase the spectral width and the number of channels of the available transmission band. The Raman amplifier is a key module for implementing the C+L band optical system, especially for the application scenarios of ultra-long distance and large span. The Raman amplifier improves the transmission distance of the optical link through distributed amplification, and on the other hand, its low noise coefficient in the L band helps to improve the post-transmission optical signal noise ratio (OSNR) of the L band service light. However, it should be noted that in the C+L system, there is a stimulated Raman scattering (SRS) effect between the pump wavelengths of the Raman amplifier and between the service lights of the C band and the L band. The above complex physical processes comprehensively affect the overall OSNR performance of the C+L system.

[0005] In summary, there is no good solution to the above problems. SUMMARY

[0006] The embodiment of the present disclosure provides a Raman amplifier gain adjustment method, a storage medium, an electronic device and a computer program product, so as to at least solve the problem that the stimulated Raman scattering effect exists between the pump wavelengths of the Raman amplifier in the C+L system and between the service lights of the C band and the L band, which affects the overall optical signal-to-noise ratio performance of the C+L system.

[0007] According to one embodiment of the present disclosure, a Raman amplifier gain adjustment method is provided, which is applied to a C+L system, wherein the C+L system comprises a transmitting end, an optical fiber and a receiving end, the receiving end comprises a backward Raman amplifier DRA-P, and the method comprises: adjusting a DRA-P pump configuration according to a first preset adjustment target; determining a third preset adjustment target of a preset virtual intermediate point position according to a second preset adjustment target of an amplifier performance parameter of the receiving end and an optical signal-to-noise ratio OSNR of the receiving end, wherein the virtual intermediate point is located between the transmitting end and the receiving end; adjusting a transmitting end configuration of the transmitting end according to the third preset adjustment target; detecting an actual OSNR of the receiving end, and in the case that the actual OSNR does not meet the second preset adjustment target, repeatedly fine-tuning the DRA-P pump configuration and / or the transmitting end configuration until the actual OSNR meets the second preset adjustment target.

[0008] According to another embodiment of the present disclosure, a computer-readable storage medium is also provided, and the storage medium stores a computer program, wherein the computer program is run by a processor to execute the steps in any of the above method embodiments.

[0009] According to another embodiment of the present disclosure, an electronic device is also provided, which comprises a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any of the above method embodiments.

[0010] According to another embodiment of the present disclosure, a computer program product is also provided, which comprises a computer program, and the computer program is run by a processor to execute the steps in any of the above method embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0011] FIG. 1 is a hardware structure block diagram of a Raman amplifier gain adjustment method according to an embodiment of the present disclosure;

[0012] FIG. 2 is a flowchart of a Raman amplifier gain adjustment method according to an embodiment of the present disclosure;

[0013] FIG. 3 is a schematic diagram of a C+L band single-span ultra-long distance system according to an embodiment of the present disclosure;

[0014] FIG. 4 is a schematic diagram of a C+L system after decoupling according to an embodiment of the present disclosure;

[0015] FIG. 5 is a flowchart of a gain adjustment method of a C+L band Raman amplifier according to an embodiment of the present disclosure;

[0016] FIG. 6 is a schematic diagram of a tuning target of a virtual intermediate point according to an embodiment of the present disclosure;

[0017] FIG. 7 is a flowchart of partial tuning of a transmitter without a DRA-B according to an embodiment of the present disclosure;

[0018] FIG. 8 is a flowchart of partial tuning of a transmitter with a DRA-B according to an embodiment of the present disclosure;

[0019] FIG. 9 is a flowchart of global tuning of a C+L system according to an embodiment of the present disclosure;

[0020] FIG. 10 is a schematic diagram of power and received OSNR after gain adjustment according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in conjunction with embodiments.

[0022] It should be noted that the terms "first", "second", and the like in the specification and claims of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence.

[0023] Embodiments of the present disclosure are applied to a C+L system, which refers to a system that simultaneously uses a C band and an L band in optical fiber communication. The C band has a smaller wavelength and lower fiber loss, and is suitable for long-distance transmission. The L band has a larger wavelength and slightly higher fiber loss, but can provide additional bandwidth in some cases. The wavelength ranges of the C band and the L band can refer to the provisions of the traditional C+L band or extended C+L band in the Telecommunication Line Standard, and the present disclosure does not limit this.

[0024] A Raman amplifier is a key module for implementing a C+L band optical system. The Raman amplifier uses the stimulated Raman scattering (SRS) effect to transfer the energy of strong pump light to signal light, thereby achieving the purpose of amplifying the optical signal. Its main advantages include: (1) the gain medium is the transmission fiber itself, which is compatible with existing optical communication systems; (2) by selecting the pump light wavelength, theoretically, flexible optical amplification configuration can be achieved for any wavelength of signal light; (3) the optical power of the signal light is distributed smoothly along the optical fiber, and the equivalent noise coefficient is low.

[0025] Unlike the gain spectrum shaping scheme based on gain flattening filters (GFF), limited by its distributed optical amplification mechanism, the multi-pump Raman amplifier is usually based on different algorithms, such as extended Kalman filter algorithm, neural network model, etc., to calculate the wavelength offset and pump power offset of different pumps respectively, and to make the entire Raman amplification gain spectrum flat within the transmission bandwidth by controlling the power of different wavelength pump lights. The main purpose is to pursue the gain flatness of the Raman amplifier.

[0026] With the commercialization of 400G systems and the rapid development of higher-rate dense wavelength division multiplexing (DWDM) systems, the application of C+L systems is inevitable, and the expansion of the C band to the C+L band also brings new challenges to the use of Raman amplifiers. The number of pumps of the C+L band Raman amplifier increases from 4 in the C band to 6, and the new pump wavelengths are usually around 1480nm and 1510nm, which leads to the SRS effect between the new wavelength and the shortest pump wavelength (such as 1420nm) becoming a factor that must be considered to affect the actual gain of the Raman amplifier and the system performance. In addition, the C-band service signal optical power will also be transferred to the L-band through the SRS effect, thereby affecting the OSNR performance of the entire system.

[0027] Therefore, in the embodiments of the present disclosure, a Raman amplifier gain adjustment method is proposed, which adopts a segmented decoupling-local optimization-global optimization adjustment method to comprehensively adjust the gain or slope of the C-band / L-band transmitter OBA and the pump power configuration of the forward / backward distributed Raman amplifier (DRA) in the system, and efficiently solves the problem of uneven received OSNR caused by the SRS effect between the Raman amplifier pumps and the C+L band service signals, thereby realizing the overall improvement of the transmission performance of the C+L optical system.

[0028] The method embodiments provided in the embodiments of the present disclosure can be executed in a mobile terminal, a computer terminal or similar computing device. Taking the case of running on a computer terminal, Fig. 1 is a hardware structure block diagram of the Raman amplifier gain adjustment method of the embodiments of the present disclosure, as shown in Fig. 1, the hardware single board can include one or more (only one is shown in Fig. 1) processors 12 (the processor 12 can include but is not limited to a processing device such as a microprocessor (Micro Processor Unit, MPU) or a programmable logic device) and a memory 14 for storing data, wherein the above computer terminal can also include a transmission device 16 for communication function and an input and output device 18. Those skilled in the art can understand that the structure shown in Fig. 1 is only schematic, which does not limit the structure of the above computer terminal. For example, the computer terminal can also include more or less components than those shown in Fig. 1, or have a different configuration from that shown in Fig. 1.

[0029] The memory 14 can be used to store computer programs, for example, software programs of application software and modules, such as the computer program corresponding to the Raman amplifier gain adjustment method in the embodiments of the present disclosure, and the processor 12 executes various functional applications and the Raman amplifier gain adjustment method by running the computer program stored in the memory 14, that is, realizes the above method. The memory 14 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid state memories. In some examples, the memory 14 can further include a memory remotely arranged with respect to the processor 12, which can be connected to the computer terminal through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0030] The transmission device 16 is used to receive or send data via a network. The specific examples of the above network can include a wireless network provided by a communication provider. In one example, the transmission device 16 includes a network adapter (Network Interface Controller, NIC) which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 16 can be a radio frequency (Radio Frequency, RF) module which is used to communicate with the Internet in a wireless manner.

[0031] A method for adjusting gain of a Raman amplifier is provided in an embodiment of the present disclosure and applied to a C+L system, wherein the C+L system comprises a transmitting end, an optical fiber and a receiving end, and the receiving end comprises a Distributed Raman Amplifier-Pre (DRA-P). The "backward" in the DRA-P refers to the transmission direction of the pump light being opposite to that of the signal light, but the DRA-P is located before the receiving end in the system.

[0032] FIG. 2 is a flow chart of the method for adjusting gain of the Raman amplifier according to an embodiment of the present disclosure, as shown in FIG. 2, the flow comprises the following steps:

[0033] In step S202, the DRA-P pump configuration is adjusted according to a first preset adjustment target;

[0034] In step S204, a third preset adjustment target of a preset virtual intermediate point position is determined according to a second preset adjustment target of an amplifier performance parameter of the receiving end and an optical signal-to-noise ratio (OSNR) of the receiving end, wherein the virtual intermediate point is located between the transmitting end and the receiving end;

[0035] In step S206, the transmitting end configuration of the transmitting end is adjusted according to the third preset adjustment target;

[0036] In step S208, an actual OSNR of the receiving end is detected, and in a case that the actual OSNR does not satisfy the second preset adjustment target, the DRA-P pump configuration and / or the transmitting end configuration is adjusted in a loop until the actual OSNR satisfies the second preset adjustment target.

[0037] In the embodiment, the parameters contained in the DRA-P pump configuration and the adjustment range of the parameters in step S202 can be set according to industry standards or enterprise standards. Exemplarily, the DRA-P pump configuration can comprise pump wavelength, pump power, Raman gain, etc., and the present disclosure does not limit this.

[0038] In the embodiment, the virtual intermediate point in step S204 is preset and used to decouple the gain adjustment of the Raman amplifier into two parts of the gain adjustment of the receiving end and the gain adjustment of the transmitting end. Exemplarily, the virtual intermediate point can be set according to the effective action distance of the DRA-P.

[0039] In the embodiment, the amplifier performance parameter in step S204 can be obtained from the amplifier manufacturer according to the amplifier model, and the amplifier performance parameter can comprise noise figure, working frequency range, gain, bandwidth, etc., and the present disclosure does not limit this. In the embodiment, the amplifier performance parameter can comprise the performance parameters of various types of amplifiers in the C+L system, such as the performance parameters of the DRA-P.

[0040] In the embodiment, the specific content of the configuration of the transmitting end in step S206 is determined by the constituent structure of the transmitting end, and can specifically include: a configuration parameter of an optical booster amplifier (OBA) of the C band, and a configuration parameter of an OBA of the L band. In some embodiments, if the transmitting end is provided with a distributed Raman amplifier-Booster (DRA-B), the configuration of the transmitting end can further include a configuration parameter of the DRA-B. The "forward" in the distributed Raman amplifier refers to the same transmission direction of the pump light and the signal light, but the DRA-B is located after the transmitting end in the system.

[0041] In the embodiment of the present disclosure, the complex C+L system can be decoupled into two parts of the receiving end and the transmitting end by setting a virtual intermediate point, wherein step S202 is local optimization of the gain of the receiving end, step S206 is local optimization of the gain of the transmitting end, and step S208 is global optimization of the entire C+L system. Through steps S202 to S208, the problem that the stimulated Raman scattering effect exists between the pump wavelengths of the Raman amplifier and between the service lights of the C band and the L band in the C+L system in the related art, which affects the overall optical signal-to-noise ratio performance of the C+L system, can be solved, the overall performance of the system is optimized, and the efficiency of the gain adjustment of the Raman amplifier in the C+L system is improved.

[0042] In some embodiments, before step S202, the method further includes: step S200, setting a virtual intermediate point.

[0043] Step S200 can include the following steps:

[0044] Step S2002, measuring an attenuation coefficient of the optical fiber, and determining an effective action distance of the DRA-P according to the attenuation coefficient;

[0045] Step S2004, setting the virtual intermediate point between the receiving end and the transmitting end according to the effective action distance of the DRA-P.

[0046] In an exemplary embodiment, step S2002 can be implemented based on the following manner:

[0047]

[0048] Wherein, L eff is the effective action distance of the DRA-P, α p is the fiber attenuation coefficient of the DRA-P pump wavelength, and L is the optical fiber length.

[0049] In the embodiment, the virtual intermediate point can be set to reduce the dimension of the complex amplifier gain adjustment problem, simplify the adjustment variable in the gain adjustment process of the L+C system, and improve the gain adjustment efficiency.

[0050] In some embodiments, step S202 can include the following steps:

[0051] In step S2022, a pump configuration search range of the DRA-P is generated according to a preset safety threshold of the total in-fiber pump power of the DRA-P.

[0052] In step S2024, the pump configuration of the DRA-P is adjusted in the pump configuration search range of the DRA-P, so that the DRA-P meets the first preset adjustment target.

[0053] In the embodiment, the preset safety threshold is generally given by an enterprise standard or an industry standard, mainly to ensure the safety of the DRA during use and prevent harm to the operator and the fiber joint. According to the preset safety threshold, a specific value of the total in-fiber pump power can be determined, and then the pump configuration search range corresponding to the value is determined.

[0054] In an exemplary embodiment, it is assumed that the total in-fiber pump power is 1600 mW, and it is assumed that the signal light in the C band and the L band is expected to obtain equal average gain in the latter half of the optical fiber (i.e., the DRA-P section), such as an average gain difference <0.1 dB. Then, by traversing, a series of pump combinations with a total pump power equal to 1600 mW and a C / L band average gain difference <0.1 dB can be obtained. This series of combinations satisfying the above requirements is the generated “pump configuration search range”. Among these pump combinations, there is a combination (optimal solution) that meets the “first preset adjustment target”.

[0055] In an exemplary embodiment, the first preset adjustment target can include that the average gain of the DRA-P in the C band and the L band is maximum. Further, in the pump configuration search range of the DRA-P, the DRA-P pump configuration with the maximum average gain can be determined by traversing all pump configurations.

[0056] In some embodiments, the third preset adjustment target includes: a power difference range of the total power of the C band and the total power of the L band at the virtual intermediate point position, a C band slope range at the virtual intermediate point position, and an L band slope range at the virtual intermediate point position.

[0057] In some embodiments, the receiving end further comprises a C-band optical pre-amplifier (OPA) and an L-band OPA; the amplifier performance parameters of the receiving end comprise a noise figure of the DRA-P, a noise figure of the C-band OPA, and a noise figure of the L-band OPA; and the second preset adjustment target comprises a preset flatness range of the receiving end OSNR and a preset lower limit value of the receiving end OSNR.

[0058] In an exemplary embodiment, the preset flatness range of the receiving end OSNR can be set by a flatness threshold, such as a flatness threshold of ±3dB, indicating that the flatness of the receiving end OSNR is required to be less than or equal to ±3dB, but the present disclosure is not limited thereto. The smaller the preset flatness range, the higher the requirement for the flatness of the receiving end OSNR.

[0059] In the present embodiment, the C+L system can be an ultra-long distance system, in order to maintain signal quality over a long distance, the system needs to maintain a high OSNR to reduce the influence of signal attenuation and noise. Therefore, the preset lower limit value can be set as a preset value of the receiving end OSNR required by the system transmission, and the actual OSNR is greater than or equal to the lower limit value, which can ensure the signal transmission quality. For example, when the preset lower limit value is set to 21dB, it indicates that the final result of gain adjustment needs to make the receiving end OSNR greater than or equal to 21dB, and the present disclosure does not limit the specific value of the preset lower limit value. The lower limit values of the receiving end OSNR of the L-band and the C-band can be set respectively.

[0060] In some embodiments, step S204 can comprise determining the third preset adjustment target according to the noise figure of the DRA-P, the noise figure of the C-band OPA, the noise figure of the L-band OPA, and the second preset adjustment target. Specifically, step S204 can comprise the following steps:

[0061] Step S2042, determining the C-band slope range according to the noise figure of the DRA-P, the noise figure of the C-band OPA, and the preset flatness range;

[0062] Step S2044, determining the L-band slope range according to the noise figure of the DRA-P, the noise figure of the L-band OPA, and the preset flatness range;

[0063] Step S2046, determining the power difference range according to the first lower limit value of the C-band and the second lower limit value of the L-band, wherein the preset lower limit value comprises the first lower limit value of the C-band and the second lower limit value of the L-band.

[0064] In an exemplary embodiment, taking the two-stage amplifier of DRA-P (hereinafter referred to as the first-stage amplifier, whose gain and noise figure are denoted as G1 and NF1 respectively) + OP A (hereinafter referred to as the second-stage amplifier, whose gain and noise figure are denoted as G2 and NF2 respectively) as an example, the OSNR at the receiving end can be calculated according to the following manner: OSNR1 = 58 + P in -Loss1 - NF1; OSNR2 = 58 + P in -Loss1 + G1 - Loss2 - NF2;

[0065] wherein P in is the signal power at the virtual intermediate point, Loss1 and Loss2 are the transmission losses of the signal light from the virtual intermediate point to the input end of the first-stage amplifier and from the output end of the first-stage amplifier to the input end of the second-stage amplifier respectively, OSNR1 and OSNR2 are the respective OSNRs of the first-stage amplifier and the second-stage amplifier after transmission calculated by the 58 formula (i.e. the OSNR calculation formula), and the total OSNR value at the receiving end can be calculated by the two values.

[0066] Further, according to the above OSNR calculation formula, in step S2042 or step S2044, the signal power P in corresponding to the signal light of different frequencies (C band or L band) at the virtual intermediate point can be reversely calculated according to the flatness requirement of the OSNR at the receiving end, so as to form the C band slope range, the L band slope range and the power difference range of the C band and the L band at the virtual intermediate point.

[0067] In some embodiments, the transmitting end comprises: a C band post-amplifier OBA and an L band OBA; and the configuration of the transmitting end comprises: a C band total in-fiber power, an L band total in-fiber power, a C band OBA slope and an L band OBA slope.

[0068] In some embodiments, step S206 can comprise the following steps:

[0069] Step S2062, determining and adjusting the C band OBA slope according to the preset C band total in-fiber power;

[0070] Step S2064, adjusting the L band total in-fiber power so that the power difference at the virtual intermediate point is within the power difference range and the C band slope at the virtual intermediate point is within the C band slope range;

[0071] Step S2066, adjusting the L band OBA slope so that the L band slope at the virtual intermediate point is within the L band slope range;

[0072] Step S2068, judging whether the power difference value of the virtual intermediate point position is still in the power difference value range, and in the case of no, fine-tuning the L-band total fiber-coupled power to make the power difference value of the virtual intermediate point position return to the power difference value range.

[0073] In the embodiment, the C-band total fiber-coupled power in step S2062 can be directly set to a value meeting the amplifier gain adjustment requirement, and only the L-band total fiber-coupled power needs to be adjusted in the subsequent optimization process, and the C-band total fiber-coupled power is no longer adjusted.

[0074] In some embodiments, step S2062 can determine the C-band OBA slope corresponding to the C-band total fiber-coupled power through a preset lookup table. The lookup table between the C-band total fiber-coupled power and the C-band OBA slope can be obtained by batch simulation according to the slope requirement (C-band slope range) of the C band in the third preset adjustment target.

[0075] In some embodiments, the transmitting end further comprises a forward Raman amplifier DRA-B.

[0076] In some embodiments, step S2064 can further comprise:

[0077] Step S2064-2, generating a pump configuration search range of the DRA-B according to a preset safety threshold of the total fiber-coupled pump power of the DRA-B;

[0078] Step S2064-4, adjusting the pump configuration of the DRA-B in the pump configuration search range of the DRA-B, and adjusting the L-band total fiber-coupled power, so that the power difference value of the virtual intermediate point position is in the power difference value range and the C-band slope of the virtual intermediate point position is in the C-band slope range.

[0079] In the embodiment, the transmitting end is further provided with the DRA-B, so the pump configuration of the DRA-B also needs to be adjusted. The adjustment process of the pump configuration of the DRA-B is similar to the adjustment method of the pump configuration of the DRA-P. A specific value of the total fiber-coupled pump power can be first determined according to the preset safety threshold, and then the pump configuration search range (containing multiple pump configurations) corresponding to the value is determined through the traversal method, and finally an optimal solution is determined from the pump configuration search range. The difference is that the pump configuration of the DRA-B also needs to be adjusted in combination with the adjustment of the L-band total fiber-coupled power.

[0080] In some embodiments, the second preset adjustment target comprises: a preset flatness range of the receiving end OSNR and a preset lower limit value of the receiving end OSNR; the transmitting end comprises: a C-band OBA and an L-band OBA; and the transmitting end configuration comprises: a C-band total fiber-coupled power, an L-band total fiber-coupled power, a C-band OBA slope, and an L-band OBA slope.

[0081] In an exemplary embodiment, the actual OSNR of the receiving end in step S208 can be directly detected, or the signal optical power and the noise optical power can be detected first, and then the actual OSNR of the receiving end is determined according to the signal optical power and the noise optical power by the following method: OSNR = 10 log 10 (P signal / P noise(0.1nm) );

[0082] wherein, OSNR is the actual OSNR of the receiving end, P signal is the total signal optical power in the channel, and P noise(0.1nm) is the total noise power in a 0.1 nm bandwidth.

[0083] In the present embodiment, the signal light and the noise light can be L-band or C-band, and the receiving end OSNR of the L-band and the receiving end OSNR of the C-band can also be detected respectively.

[0084] In some embodiments, in the case that the actual OSNR does not meet the second preset adjustment target in step S208, the DRA-P pump configuration and / or the transmitting end configuration is cyclically fine-tuned until the actual OSNR meets the second preset adjustment target, which can comprise the following steps:

[0085] Step S2082, in the case that the flatness of the actual OSNR is outside the preset flatness range, and the C-band OBA slope or the L-band OBA slope has an adjustment margin, the C-band OBA slope or the L-band OBA slope with the adjustment margin is adjusted;

[0086] Step S2084, in the case that the flatness of the actual OSNR is outside the preset flatness range, and the C-band OBA slope and the L-band OBA slope both do not have an adjustment margin, the DRA-P pump configuration is adjusted;

[0087] Step S2086, in the case that the flatness of the actual OSNR is within the preset flatness range, and the actual OSNR is less than the preset lower limit value, the L-band total fiber-coupled power is adjusted;

[0088] Step S2088, in the case that the flatness of the actual OSNR is within the preset flatness range, and the value of the actual OSNR is greater than or equal to the preset lower limit value, stop adjusting.

[0089] In the embodiment, the cyclic fine tuning refers to repeatedly performing the steps S2082 to S2086 multiple times, each time adjusting the corresponding DRA-P pump configuration and / or the transmitter configuration according to the current actual ONSR, and re-detecting the actual ONSR after each adjustment until the actual OSNR meets the second preset adjustment target, and stop adjusting, i.e., step S2088.

[0090] In an exemplary embodiment, in step S2086, if the actual OSNR of the C band is less than the preset lower limit value, the L band fiber input power is reduced; if the actual OSNR of the L band is less than the lower limit value, the L band fiber input power is increased.

[0091] In the embodiment, the DRA-P pump configuration in step S2084 is also adjusted within the pump configuration search range. Exemplarily, all DRA-P pump configuration parameters in the search range can be sorted in descending order of average gain, and adjusted in turn. In some embodiments, the average gain of each group of parameters in the pump configuration search range can be determined in advance by traversal. In the global tuning process, if the DRA-P pump configuration needs to be adjusted, the second suboptimal solution, i.e., the DRA-P pump configuration with the second largest average gain, can be directly determined from the pump configuration search range.

[0092] In the embodiment, through the steps S2082 to S2084, global adjustment of the system can be achieved, the flatness requirement of the receiver OSNR and the value requirement of the system transmission OSNR can be met, and the overall transmission performance of the C+L system can be improved.

[0093] The Raman amplifier gain adjustment method in the embodiment of the disclosure adopts the adjustment method of segmented decoupling-local optimization-global optimization to comprehensively adjust the gain or slope of the C band / L band transmitter OBA and the pump power configuration of the forward / backward Raman amplifier D in the system, efficiently solves the problem of non-flat receiver OSNR caused by the SRS effect between the Raman amplifier pumps and the C+L band service signals, and improves the overall transmission performance of the C+L optical system.

[0094] Each method embodiment in the disclosure can be applied to a single-span C+L system, or a multi-span C+L system. The multi-span system can be understood as a plurality of single-span systems, and the gain adjustment can be performed in each single-span system based on the order of segmented decoupling-local optimization-global optimization and according to the steps in any method embodiment of the disclosure.

[0095] Figure 3 is a schematic diagram of a C+L band single-span ultra-long distance system in an embodiment of the present disclosure. As shown in Figure 3, the system comprises the following structure:

[0096] a transmitting end 31, an optical fiber 32, and a receiving end 33.

[0097] The transmitting end 31 comprises a C band post optical booster amplifier OBA(C) and an L band post optical booster amplifier OBA(L).

[0098] The transmitting end 31 can further comprise a forward Raman amplifier DRA-B (optional).

[0099] The receiving end 33 comprises a backward Raman amplifier DRA-P, a C band pre optical amplifier OPA(C), and an L band pre optical amplifier OPA(L).

[0100] In the embodiment, the pre optical amplifier OBA and the post optical amplifier OPA can adopt the same type of optical amplifier. The “post” in the post optical amplifier refers to its position in the signal processing of the transmitting end. The “pre” in the pre optical amplifier refers to its position in the signal processing of the receiving end.

[0101] In the embodiment, the optical fiber 32 is connected between the transmitting end 31 and the receiving end 33 for optical signal transmission therebetween.

[0102] Due to the large number of core devices involved in the DRA-containing C+L system and the multiple parameter adjustment dimensions, directly adjusting the entire C+L system will make the adjustment process extremely complex. The present disclosure can achieve dimension reduction of the complex adjustment problem by setting a virtual intermediate point to segmentally decouple the C+L system, thereby simplifying the system adjustment variables and improving the adjustment efficiency.

[0103] Figure 4 is a schematic diagram of the C+L system after segmental decoupling in an embodiment of the present disclosure. As shown in Figure 4, the virtual intermediate point can be set at a certain position on the optical fiber 32 according to the effective action distance of the DRA-P.

[0104] In the embodiment, with the virtual intermediate point as the connection, the C+L system with a total length of L can be divided into two relatively independent and closely related parts, i.e., a front half with a length of L1 and a rear half with a length of L2.

[0105] In the embodiment, based on the segmental decoupling, the gain adjustment process of the entire system can be divided into two major steps, i.e., local optimization and global optimization.

[0106] In the local optimization step, the pump configuration of the receiving end DRA-P is first adjusted, and the power / slope requirement at the virtual intermediate point is obtained according to the specific performance of the OPA and the OSNR requirement of the receiving end; the requirement is used as the connection of the L1 segment and the L2 segment to complete the configuration adjustment of the transmitting end (which can include DRA-B).

[0107] In the global optimization step, the optimization result of the local optimization is used as the initial value, and the power / slope of the C / L band is cyclically fine-tuned in combination with the OSNR performance of the receiving end of the entire system, and then the optimization of the overall configuration of the system is completed.

[0108] It should be noted that, since the system after the segmented decoupling is optimized in the order of "receiving end (including DRA-P)-transmitting end (which can include DRA-B)-overall", the two steps of local optimization and global optimization also need to be performed in sequence.

[0109] In some embodiments, when the fiber attenuation coefficient changes, the effective action distance of DRA-P and the corresponding generated L2 absolute value will change, but this change does not affect the selection method of the virtual intermediate point and the subsequent optimization scheme.

[0110] FIG. 5 is a whole flowchart of the gain adjustment method of the C+L band Raman amplifier in an embodiment of the present disclosure. As shown in FIG. 5, the flowchart includes the following steps:

[0111] Step S1, setting a virtual intermediate point to segmentally decouple the C+L system;

[0112] Step S2, locally optimizing the receiving end;

[0113] Step S3, locally optimizing the transmitting end;

[0114] Step S4, globally optimizing the C+L system.

[0115] In the present embodiment, step S1 sets a virtual intermediate point in a single span of the C+L system as the basis for system optimization. Specifically, according to the actual fiber attenuation coefficient of the transmission fiber, the effective action distance of DRA-P can be obtained, and then the virtual intermediate point is set in the fiber according to the effective action distance of DRA-P.

[0116] In the present embodiment, before step S2 locally optimizes the receiving end, the adjustment range of the receiving end configuration parameters needs to be determined. Specifically, the pump configuration search range of DRA-P can be generated according to the total in-fiber pump power safety threshold requirement.

[0117] In the embodiment, the step S2 can specifically include: adjusting the pump configuration of the DRA-P within a pump configuration search range of the DRA-P to maximize the average gain of the DRA-P, thereby completing the local optimization of the receiving end.

[0118] In the embodiment, before the local optimization of the transmitting end in the step S3, an optimization target of the intermediate point position needs to be generated according to the noise coefficients of the DRA-P and the receiving end OPA, with the target of the OSNR flatness of the receiving end. The optimization target can specifically include the power difference range of the C band and the L band, the slope range of the C band, and the slope range of the L band.

[0119] In the embodiment, the step S3 is the local optimization of the transmitting end configuration based on the optimization target of the intermediate point position.

[0120] In the embodiment, the step S4 is the global optimization of the overall performance of the C+L system based on the value and flatness requirement of the OSNR of the C+L system as a whole.

[0121] Through the embodiments of the present disclosure, the complexity of the Raman amplifier gain adjustment in the C+L system can be reduced, the parameter change to be adjusted in the C+L system can be simplified, the gain adjustment efficiency can be improved, and the overall transmission performance of the C+L system can be improved.

[0122] FIG. 6 is a schematic diagram of the optimization target of the virtual intermediate point in an embodiment of the present disclosure. As shown in FIG. 6, the optimization target of the virtual intermediate point (i.e., the third preset adjustment target in the above embodiment) is the adjustment direction of the above step S3, and can specifically include the following contents:

[0123] The power difference range △P_all of the C band total power and the L band total power of the virtual intermediate point position;

[0124] The C band slope range k_out_C of the virtual intermediate point position;

[0125] The L band slope range k_out_L of the virtual intermediate point position.

[0126] In the embodiment, the abscissa is the optical signal frequency (unit: THz), the ordinate is the signal light power (unit: dBm), the slope is the ratio of the signal light power change amount to the optical signal frequency change amount (unit: dB / THz), and the power unit dBm is obtained after subtraction.

[0127] In the embodiment, the C band total power is P_out_C_all, the L band total power is P_out_L_all, and the power difference range △P_all is determined by the difference between the two △P_all=P_out_C_all-P_out_L_all.

[0128] In the embodiment, the tuning target of the virtual intermediate point is generated with the target of flat receiving end OSNR. For example, the absolute value of the unevenness of the C+L band receiving end OSNR is less than 3 dB as the final adjustment target, and the slope / power range at the virtual intermediate point can be reversely calculated. In the above scenario, the slope at the intermediate point is searched with a step of 0.5 dB / THz, and the intermediate point target range shown in FIG. 6 is obtained as follows:

[0129] The power difference range ΔP_all ∈ [0.9, 1.2] (dB);

[0130] The C band slope range k_out_C ∈ [0.5, 1.5] (dB / THz);

[0131] The L band slope range k_out_L ∈ [-1, 0] (dB / THz).

[0132] In the embodiment of the present disclosure, the adjustment parameters involved in the local tuning of the transmitting end are related to the actual configuration of the C+L system, which can be divided into two cases including DRA-B and not including DRA-B, and the adjustment processes of the two cases are basically the same. In the case including DRA-B, the step of adjusting the DRA-B pump configuration needs to be additionally added.

[0133] In the embodiment of the present disclosure, considering that there are a large number of different configurations of the transmitting end C / L band fiber input power / slope, and the fiber input power size is closely related to the SRS effect strength between bands and the DRA-B gain, therefore, in the process of the local tuning of the transmitting end, the C band fiber input power needs to be determined first, and according to the C band fiber input power and the slope / power requirement of the virtual intermediate point, the optimization results of the C band OBA slope, the L band fiber input power and the L band OBA slope can be sequentially found.

[0134] FIG. 7 is a flowchart of the local tuning of the transmitting end without DRA-B in an embodiment of the present disclosure. As shown in FIG. 7, the flowchart includes the following steps:

[0135] Step S700, the local tuning of the transmitting end starts;

[0136] Step S701, the C band fiber input total power value is input;

[0137] Step S702, the C band OBA slope is selected according to the C band fiber input total power;

[0138] Step S703, the L band fiber input total power is adjusted based on the power difference range at the intermediate point;

[0139] Step S704, the L band OBA slope is adjusted based on the L band slope range at the intermediate point;

[0140] Step S705, judging whether the C / L power difference at the intermediate point deviates from the power difference value range at this time;

[0141] Step S706, if the power difference deviates from the power difference value range, fine-tuning the L-band total fiber-coupled power so that the C / L power difference at the intermediate point returns to the target range;

[0142] Step S707, outputting the power / slope configuration of the transmitting end;

[0143] Step S708, ending the local optimization of the transmitting end.

[0144] In the embodiment, the transmitting end configuration is adjusted in the following order: C-band total fiber-coupled power, C-band OBA slope, L-band total fiber-coupled power, L-band OBA slope. In some cases, the L-band total fiber-coupled power needs to be fine-tuned again at the end.

[0145] In the embodiment, step S703 is based on the C / L-band power difference target value at the intermediate point and the C-band slope requirement, adjusting the L-band total fiber-coupled power so that the C / L-band power difference at the intermediate point and the C-band slope at this time reach or as close as possible to the target value.

[0146] In the embodiment, step S704 is based on the L-band slope requirement at the intermediate point, adjusting the L-band OBA slope so that the L-band slope at the intermediate point at this time reaches or as close as possible to the target value.

[0147] FIG. 8 is a flowchart of the local optimization of the transmitting end containing a DRA-B in an embodiment of the present disclosure. As shown in FIG. 8, the flowchart includes the following steps:

[0148] Step S800, starting the local optimization of the transmitting end;

[0149] Step S801, inputting the C-band total fiber-coupled power value;

[0150] Step S802, selecting the C-band OBA slope according to the C-band total fiber-coupled power;

[0151] Step S803, adjusting the DRA-B pump configuration and the L-band total fiber-coupled power based on the power difference value range at the intermediate point and the C-band slope range;

[0152] Step S804, adjusting the L-band OBA slope based on the L-band slope range at the intermediate point;

[0153] Step S805, judging whether the C / L power difference at the intermediate point deviates from the power difference value range at this time;

[0154] Step S806, if the power difference deviates from the power difference value range, fine-tune the L-band total in-fiber power so that the C / L power difference at the middle point returns to the target range;

[0155] Step S807, output the power / slope configuration of the transmitting end;

[0156] Step S808, end of local optimization of the transmitting end.

[0157] In the embodiment, the transmitting end configuration is adjusted in the following order: C-band total in-fiber power, C-band OBA slope, DRA-B pump configuration and L-band total in-fiber power, L-band OBA slope. In some cases, the L-band total in-fiber power needs to be fine-tuned again at the end.

[0158] In the embodiment, step S803 is to generate the pump power configuration of the DRA-B based on the target value of the C / L-band power difference at the middle point and the C-band slope requirement, and adjust the L-band total in-fiber power so that the C / L-band power difference at the middle point and the C-band slope at this time reach or as close as possible to the target value.

[0159] In the embodiment, step S804 is to adjust the L-band OBA slope based on the L-band slope requirement at the middle point so that the L-band slope at the middle point at this time reaches or as close as possible to the target value.

[0160] FIG. 9 is a flowchart of global optimization of a C+L system in an embodiment of the present disclosure. As shown in FIG. 9, the flowchart includes the following steps:

[0161] Step S900, start of global optimization;

[0162] Step S901, calculate the receiving end OSNR;

[0163] Step S902, judge whether the receiving end OSNR flatness meets the requirement;

[0164] Step S903, judge whether there is slope adjustment margin for the transmitting end OBA of the corresponding band;

[0165] Step S904, adjust the transmitting end OBA slope of the corresponding band;

[0166] Step S905, adjust the pump configuration of the DRA-P;

[0167] Step S906, judge whether the receiving end OSNR value meets the requirement;

[0168] Step S907, adjust the L-band total in-fiber power;

[0169] Step S908, output the overall system configuration;

[0170] Step S909, the global optimization ends.

[0171] In this embodiment, the global optimization is performed by multiple loops of fine tuning, in which the received OSNR flatness is first adjusted to the target range (i.e., the preset flatness range), and then the specific value of the received OSNR is adjusted to the target range (i.e., greater than or equal to the preset lower limit value).

[0172] In this embodiment, step S901 is to take the received end local optimization result (i.e., the pump configuration when the DRA-P average gain is maximum) and the transmission end local optimization result as the initial value of the global optimization, and to calculate the received end OSNR (also referred to as the post-transmission OSNR) under the initial value combination. Then, step S902 is to judge whether the received end OSNR flatness meets the requirement.

[0173] If step S902 judges yes, the received end OSNR flatness meets the requirement, then jump to step S906 to further judge whether the specific value of the received end OSNR meets the requirement; if step S902 judges no, the received end OSNR flatness does not meet the requirement, then execute step S903 to judge whether there is a slope adjustment margin for the transmission end OBA of the corresponding waveband.

[0174] If step S903 judges yes, there is a slope adjustment margin for the C / L transmission end OBA, then execute step S904 to adjust the slope of the transmission end OBA of the corresponding waveband; if step S903 judges no, there is no slope adjustment margin for the C / L transmission end OBA, then jump to step S905 to adjust the pump configuration of the DRA-P.

[0175] If step S906 judges no, the value of the received end OSNR does not meet the requirement, then execute step S907 to adjust the total power of the L waveband into the fiber; if step S906 judges yes, the value of the received end OSNR meets the requirement, then jump to step S908 to output the overall configuration of the system.

[0176] In this embodiment, only one parameter / configuration is fine tuned in each loop, and the received end OSNR is recalculated after the fine tuning to start a new loop. Specifically, after the adjustment in step S904 / step S905 / step S907, step S901 is returned to recalculate the received end OSNR according to the current parameter information.

[0177] In this embodiment, the requirement for the received end OSNR flatness is that the received end OSNR is within the preset flatness range, and exemplarily, the preset flatness range can be set as [-3dB, 3dB]. The requirement for the value of the received end OSNR is that the received end OSNR is greater than or equal to the preset lower limit value of the received end OSNR to meet the requirement of the ultra-long distance system transmission.

[0178] In the embodiment, the step S903 and the step S904 can include: if the C-band OBA has a slope adjustment margin, adjusting the slope of the C-band OBA; and if the L-band OBA has a slope adjustment margin, adjusting the slope of the L-band OBA.

[0179] In some embodiments, the specific value and the flatness value of the received-end OSNR in the step S901 can also be obtained directly through detection.

[0180] FIG. 10 is a schematic diagram of the power after gain adjustment, and the received-end OSNR according to an embodiment of the present disclosure. As shown in FIG. 10, a is the output power distribution of the transmitting-end OBA, b is the power distribution at the virtual intermediate point, and c is the received-end OSNR distribution.

[0181] In the embodiment, taking the scenario of G.654 as an example, the total output power of the C-band OBA is set to be 17 dBm. The transmitting-end OBA output power distribution (a) and the power distribution at the virtual intermediate point (b) in FIG. 10 are obtained through local optimization of the transmitting end, where the C / L-band slopes at the virtual intermediate point are 0.9 dB / THz and -0.05 dB / THz respectively, which are consistent with the pre-determined intermediate point target range (i.e., the third preset adjustment target). The received-end OSNR distribution (c) in FIG. 10 is obtained through global optimization, where the flatness of the received-end OSNR is less than ±2 dB, which satisfies the requirement that the flatness is less than ±3 dB at the beginning of optimization.

[0182] The embodiment of the present disclosure further provides a computer readable storage medium, which stores a computer program. When the computer program is run by a processor, the steps in any of the above method embodiments are performed.

[0183] In an example embodiment, the above computer readable storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store computer programs.

[0184] The embodiment of the present disclosure further provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0185] In an example embodiment, the above electronic device can further include a transmission device and an input / output device, where the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0186] The embodiments of the present disclosure further provide a computer program product comprising a computer program which, when executed by a processor, implements the steps of any of the method embodiments described above.

[0187] In one exemplary embodiment, the computer program product comprises a non-transitory computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method described in various embodiments of the present disclosure.

[0188] The specific examples in the present embodiments can refer to the examples described in the above embodiments and exemplary implementation manners, which will not be described herein again.

[0189] Obviously, those skilled in the art should understand that the modules or steps of the present disclosure described above can be realized by general computing devices, which can be concentrated on a single computing device or distributed on a network composed of multiple computing devices, which can be realized by program codes executable by the computing devices, so that they can be stored in storage devices and executed by the computing devices, and in some cases, the steps shown or described can be executed in different order, or they can be respectively manufactured into individual integrated circuit modules, or multiple modules or steps among them can be manufactured into a single integrated circuit module to realize. Thus, the present disclosure is not limited to any specific combination of hardware and software.

[0190] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A Raman amplifier gain adjustment method, applied to a C+L system, wherein, The C+L system includes a transmitter, an optical fiber, and a receiver. The receiver includes a backward Raman amplifier (DRA-P). The method includes: The DRA-P pump configuration is adjusted according to the first preset adjustment target; A third preset adjustment target for the position of the virtual intermediate point is determined based on the amplifier performance parameters of the receiving end and the second preset adjustment target for the optical signal-to-noise ratio (OSNR) of the receiving end, wherein the virtual intermediate point is located between the transmitting end and the receiving end. The transmitter configuration of the transmitter is adjusted according to the third preset adjustment target; The actual OSNR of the receiver is detected. If the actual OSNR does not meet the second preset adjustment target, the DRA-P pump configuration and / or the transmitter configuration are cyclically fine-tuned until the actual OSNR meets the second preset adjustment target.

2. The method according to claim 1, wherein, Before adjusting the DRA-P pump configuration according to a first preset adjustment target, the method further includes: The attenuation coefficient of the optical fiber is measured, and the effective operating distance of the DRA-P is determined based on the attenuation coefficient. The virtual intermediate point is set between the receiver and the transmitter according to the effective operating distance of the DRA-P.

3. The method according to claim 1, wherein, Adjusting the DRA-P pump configuration according to a first preset adjustment target includes: Based on the preset safety threshold of the total fiber-injection pump power of the DRA-P, the pump configuration search range of the DRA-P is generated; Adjust the DRA-P pump configuration within the DRA-P pump configuration search range to make the DRA-P meet the first preset adjustment target.

4. The method according to claim 1, wherein, The third preset adjustment target includes: the power difference range between the total C-band power and the total L-band power at the virtual midpoint position, the slope range of the C-band at the virtual midpoint position, and the slope range of the L-band at the virtual midpoint position.

5. The method according to claim 4, wherein, The receiver also includes a C-band preamplifier (OPA) and an L-band OPA. The amplifier performance parameters of the receiving end include: the noise figure of the DRA-P, the noise figure of the C-band OPA, and the noise figure of the L-band OPA; The second preset adjustment target includes: a preset flatness range of the receiver OSNR and a preset lower limit value of the receiver OSNR.

6. The method according to claim 5, wherein, A third preset adjustment target for determining the preset virtual intermediate point position is determined based on the amplifier performance parameters of the receiving end and the second preset adjustment target for the optical signal-to-noise ratio (OSNR) of the receiving end, including: The C-band slope range is determined based on the noise figure of the DRA-P, the noise figure of the C-band OPA, and the preset flatness range. The L-band slope range is determined based on the noise figure of the DRA-P, the noise figure of the L-band OPA, and the preset flatness range. The power difference range is determined based on a first lower limit value for the C-band and a second lower limit value for the L-band, wherein the preset lower limit value includes the first lower limit value for the C-band and the second lower limit value for the L-band.

7. The method according to claim 4, wherein, The transmitter includes: a C-band post-optical amplifier (OBA) and an L-band OBA; The transmitter configuration includes: total C-band fiber input power, total L-band fiber input power, C-band OBA slope, and L-band OBA slope.

8. The method according to claim 7, wherein, Adjusting the transmitter configuration according to the third preset adjustment target includes: The C-band OBA slope is determined and adjusted based on the preset total C-band fiber input power. Adjust the total power input to the L-band so that the power difference at the virtual midpoint is within the range of the power difference and the slope of the C-band at the virtual midpoint is within the range of the C-band slope. Adjust the slope of the L-band OBA so that the slope of the L-band at the virtual midpoint position is within the range of the L-band slope. Determine whether the power difference at the virtual midpoint is still within the power difference range. If the determination result is negative, fine-tune the total power input to the L-band fiber to bring the power difference at the virtual midpoint back into the power difference range.

9. The method according to claim 8, wherein, The transmitter also includes a forward Raman amplifier DRA-B.

10. The method according to claim 9, wherein, Adjusting the total L-band input power to ensure that the power difference at the virtual midpoint is within the specified power difference range and the C-band slope at the virtual midpoint is within the specified C-band slope range, further includes: Based on the preset safety threshold of the total fiber-injection pump power of the DRA-B, the pump configuration search range of the DRA-B is generated; Adjust the DRA-B pump configuration within the DRA-B pump configuration search range, and adjust the total L-band fiber input power so that the power difference at the virtual midpoint position is within the power difference range and the C-band slope at the virtual midpoint position is within the C-band slope range.

11. The method according to claim 1, wherein, The second preset adjustment target includes: a preset flatness range of the receiver OSNR and a preset lower limit value of the receiver OSNR; The transmitter includes: C-band OBA and L-band OBA; The transmitter configuration includes: total C-band fiber input power, total L-band fiber input power, C-band OBA slope, and L-band OBA slope.

12. The method according to claim 11, wherein, If the actual OSNR does not meet the second preset adjustment target, the DRA-P pump configuration and / or the transmitter configuration are cyclically fine-tuned until the actual OSNR meets the second preset adjustment target, including: If the flatness of the actual OSNR is outside the preset flatness range, and there is an adjustment margin for the C-band OBA slope or the L-band OBA slope, adjust the C-band OBA slope or the L-band OBA slope with the adjustment margin. When the flatness of the actual OSNR is outside the preset flatness range, and there is no adjustment margin for both the C-band OBA slope and the L-band OBA slope, adjust the DRA-P pump configuration. If the flatness of the actual OSNR is within the preset flatness range and the value of the actual OSNR is less than the preset lower limit, adjust the total power of the L-band fiber input. Adjustment stops when the flatness of the actual OSNR is within the preset flatness range and the value of the actual OSNR is greater than or equal to the preset lower limit.

13. A computer-readable storage medium, wherein, The storage medium stores a computer program, wherein the computer program is executed by a processor to perform the method described in any one of claims 1 to 12.

14. An electronic device comprising a memory and a processor, wherein, The memory stores a computer program, and the processor is configured to run the computer program to perform the method as described in any one of claims 1 to 12.

15. A computer program product comprising a computer program, wherein, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 12.

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