Cross-segment loss model parameter adjustment method and device, equipment and storage medium

Abstract

The invention discloses a cross-segment loss model parameter adjustment method, device and equipment and a storage medium, and relates to the technical field of optical fiber communication, and the method comprises the steps: constructing a cross-segment loss model for the output of an amplifier in an optical link to the input of a next-stage amplifier; adjusting a current Raman proportionality coefficient of the cross-segment loss model based on the wave combination error curve slopes of the C wave band and the L wave band to obtain an adjusted Raman proportionality coefficient; and if the adjusted Raman proportionality coefficient is not in the value range of the Raman proportionality coefficient, adjusting the input insertion loss of the C wave band and the input insertion loss of the L wave band. According to the invention, the technical problems in the prior art that the parameter adaptation of the optical fiber model is difficult and the precision cannot be guaranteed are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber communication, and in particular, to a method, device, equipment and storage medium for adjusting parameters of a cross-segment loss model. Background Art

[0002] Currently, in a C-band system, the attenuation of an optical signal propagating in an optical fiber is basically linear. Therefore, the error of an optical network digital twin system mainly considers the optical amplifier model. In a C-band + L-band system, due to the influence of the SRS (stimulated Raman scattering) effect, the error of the optical fiber model cannot be ignored either.

[0003] The optical fiber model is usually a physical model established by the SRS equation. A link is represented as an optical amplifier model cascaded with an optical fiber model and then cascaded with another optical amplifier model. For a C-band + L-band system, there are two signals in the C-band and L-band respectively passing through a C amplifier and an L amplifier, and after being combined by a multiplexer, they enter a long optical fiber as one signal. After the signal comes out of the long optical fiber, it needs to be first separated by a demultiplexer into a C-band signal and an L-band signal and then enter the next-stage C amplifier and L amplifier respectively.

[0004] Therefore, when the current optical fiber model is applied to a C-band + L-band system, on the one hand, since the optical fiber attenuation parameters in the optical fiber model are different for different optical fibers and need to be adjusted separately, and currently, a large amount of input and output power spectrum data of optical fibers need to be collected for parameter adjustment, making it difficult to adapt the optical fiber model parameters; on the other hand, the introduction of multiplexing and demultiplexing will inevitably bring insertion loss, and the power transfer magnitude of the SRS effect is affected by the input powers of the C-band and L-band. Therefore, the insertion loss estimation between the optical amplifier and the optical fiber will also have a great impact on the output error of the optical fiber model, and it is also difficult to measure the insertion loss in the existing network, resulting in the inability to guarantee the accuracy of the model. Summary of the Invention

[0005] The present invention provides a method, device, equipment and storage medium for adjusting parameters of a cross-segment loss model, which can solve the technical problems of difficult adaptation of optical fiber model parameters and inability to guarantee accuracy in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for adjusting parameters of a cross-segment loss model, the method comprising:

[0008] Constructing a cross-segment loss model for the output of an amplifier to the input of the next-stage amplifier in an optical link;

[0009] Adjusting the current Raman proportional coefficient of the cross-segment loss model based on the slope of the combined wave error curve of the C-band and L-band to obtain an adjusted Raman proportional coefficient;

[0010] If the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient, adjust the input insertion loss of the C-band and the input insertion loss of the L-band.

[0011] In a second aspect, an embodiment of the present invention provides a device for adjusting cross-segment loss model parameters, the device including:

[0012] A model construction module configured to construct a cross-segment loss model for the output of an amplifier in an optical link to the input of the next-stage amplifier;

[0013] A first parameter adjustment module configured to adjust the current Raman proportionality coefficient of the cross-segment loss model based on the slope of the combined-wave error curve of the C-band and the L-band to obtain an adjusted Raman proportionality coefficient;

[0014] A second parameter adjustment module configured to adjust the input insertion loss of the C-band and the input insertion loss of the L-band if the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient.

[0015] In a third aspect, an embodiment of the present invention further provides an electronic device, including: a memory, a processor; the processor is configured to read and execute a computer program stored in the memory to implement the steps of the foregoing method for adjusting cross-segment loss model parameters.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed, the steps of the foregoing method for adjusting cross-segment loss model parameters are implemented.

[0017] In a fifth aspect, an embodiment of the present invention further provides a computer program product, including a computer program / instructions, and when the computer program / instructions are executed by a processor, the steps of the foregoing method for adjusting cross-segment loss model parameters are implemented.

[0018] The beneficial effects brought by the technical solutions provided by the embodiments of the present invention include:

[0019] Construct a cross-segment loss model for the output of an amplifier in an optical link to the input of the next-stage amplifier; adjust the current Raman proportionality coefficient of the cross-segment loss model based on the slope of the combined-wave error curve of the C-band and the L-band to obtain an adjusted Raman proportionality coefficient, without the need for fiber output power spectrum data that is difficult to collect in the existing network, nor the need to collect a large amount of training data in advance, and the model parameters can be adjusted, greatly reducing the difficulty of model parameter adaptation;

[0020] If the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient, the input insertion loss of the C band and the input insertion loss of the L band are adjusted, and the insertion losses at both ends of the long fiber are also used as parameters, which can be dynamically adjusted according to the different operating states of the existing network and different application scenarios of the existing network, improving the freedom and accuracy of the span loss model.

[0021] Through the present invention, the technical problems of difficult adaptation of optical fiber model parameters and inability to guarantee accuracy in the related art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic flowchart of an embodiment of the method for adjusting the span loss model parameters of the present invention;

[0024] Figure 2 It is a schematic diagram of a C band + L band system;

[0025] Figure 3 It is a schematic diagram of the span loss model of the present invention;

[0026] Figure 4 For Figure 1 It is a detailed flowchart of step S10 in

[0027] Figure 5 For Figure 1 It is a detailed flowchart of an embodiment of step S20 in

[0028] Figure 6 For Figure 1 It is a detailed flowchart of another embodiment of step S20 in

[0029] Figure 7 It is a schematic diagram of the functional modules of an embodiment of the device for adjusting the span loss model parameters of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] In a first aspect, an embodiment of the present invention provides a method for adjusting parameters of a span loss model.

[0034] In one embodiment, referring to Figure 1 , Figure 1 is a schematic flowchart of an embodiment of the method for adjusting parameters of the span loss model of the present invention. As shown in Figure 1 , the method for adjusting parameters of the span loss model includes:

[0035] Step S10: Construct a span loss model for the output of the amplifier in the optical link to the input of the next-stage amplifier;

[0036] In this embodiment, referring to Figure 2 , Figure 2 is a schematic diagram of a C-band + L-band system. As shown in Figure 2 , in the C-band + L-band system, the C-band and L-band signals pass through the C amplifier and the L amplifier respectively. After being combined by the multiplexer into one signal and then entering the long optical fiber, when the signal comes out of the long optical fiber, it needs to be first separated by the demultiplexer into the C-band signal and the L-band signal and then enter the next-stage C amplifier and L amplifier respectively. The introduction of multiplexing and demultiplexing will inevitably bring insertion loss. Therefore, the present invention constructs a span loss model for the part from the output of the amplifier in the optical link to the input of the next-stage amplifier. Referring to Figure 3 , Figure 3 is a schematic diagram of the span loss model of the present invention. As shown in Figure 3 , the span loss model includes the insertion loss when the output optical signals of the C and L amplifiers enter the long optical fiber through the multiplexing device, the attenuation during propagation on the long optical fiber, and the insertion loss when the signal is separated into two paths by the demultiplexer and enters the next-stage C and L amplifiers. The input of the span loss model is the single-wavelength power spectrum output by the previous-stage C and L optical amplifiers, and the data is collected through the OPM board at the MON port of the amplifier or calculated by the optical amplifier model. The output of the span loss model is the single-wavelength power spectrum input to the next-stage C and L optical amplifiers. If there is an adjustable optical attenuator before the C and L optical amplifiers, the output is the single-wavelength power spectrum input to the adjustable optical attenuator. The parameters of the model are the fiber length length, the fiber attenuation spectrum ρ, and the Raman gain spectrum G R, Raman proportionality coefficient g, input insertion loss δ in the C band C , input insertion loss δ in the L band L , output insertion loss δ' in the C band c and output insertion loss δ' in the L band L .

[0037] The calculation expression of the span loss model is:

[0038]

[0039] In the formula, is the actual input power spectrum of the C band of the optical fiber, is the output single-wave power spectrum of the previous-stage C optical amplifier, δ C is the input insertion loss in the C band, is the actual input power spectrum of the L band of the optical fiber, is the output single-wave power spectrum of the previous-stage L optical amplifier, δ L is the input insertion loss in the L band, is the actual output power spectrum of the C band of the optical fiber, is the actual output power spectrum of the L band of the optical fiber, g is the Raman proportionality coefficient, G R is the Raman gain spectrum, ρ is the optical fiber attenuation spectrum, SRS() is the SRS equation, is the input single-wave power spectrum of the next-stage C optical amplifier, δ' c is the output insertion loss in the C band, is the input single-wave power spectrum of the next-stage L optical amplifier, δ' L is the output insertion loss in the L band.

[0040] Through this embodiment, a span loss model is proposed for the C+L system to describe the attenuation of the optical signal from the output of the previous-stage optical amplifier through multiplexing and then into the long fiber, and then through demultiplexing and into the next-stage optical amplifier. This solves the problem that there are insertion losses at the connection between the long fiber and the amplifier in the existing network, and these insertion losses are difficult to measure and affect the magnitude of the Raman effect, resulting in an increase in the error of the current optical fiber model in the existing network application.

[0041] Step S20, based on the slope of the multiplexing error curve in the C band and the L band, adjust the current Raman proportionality coefficient of the span loss model to obtain the adjusted Raman proportionality coefficient;

[0042] In this embodiment, the magnitude of the Raman proportionality coefficient reflects the magnitude of the Raman effect power transfer. When the Raman proportionality coefficient increases, the calculated power transfer from the C-band to the L-band increases; when the Raman proportionality coefficient decreases, the power transfer from the C-band to the L-band decreases. When the Raman proportionality coefficient is smaller than the actual value, that is, the calculated power transfer is smaller than the actual value, the combined-wave power error of the C-band is positive and the error of the L-band is negative. At this time, the combined-wave error fitting curve has a negative slope. Similarly, when the Raman proportionality coefficient is larger than the actual value, the combined-wave error fitting curve has a positive slope. Therefore, the slopes of the combined-wave error curves of the C-band and the L-band can be used as feedback values to adjust the current Raman proportionality coefficient of the inter-span loss model to obtain the adjusted Raman proportionality coefficient. It is not necessary to use the fiber output power spectrum data that is difficult to collect in the existing network, nor is it necessary to collect a large amount of training data in advance to adjust the model parameters, which greatly reduces the difficulty of adapting the model parameters.

[0043] Step S30, if the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient, adjust the input insertion loss of the C-band and the input insertion loss of the L-band.

[0044] In this embodiment, after obtaining the adjusted Raman proportionality coefficient, it is detected whether the adjusted Raman proportionality coefficient is within the value range of the Raman proportionality coefficient. If the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient, adjust the input insertion loss of the C-band and the input insertion loss of the L-band. Through this embodiment, the insertion losses at both ends of the long fiber are also used as parameters, which can dynamically adjust the parameters according to the different operating states of the existing network and different application scenarios of the existing network, improving the freedom and accuracy of the inter-span loss model, and solving the technical problem in the related art that the magnitude of the power transfer of the SRS effect is affected by the input powers of the C-band and the L-band, so that the insertion loss estimation between the optical amplifier and the optical fiber will also have a great impact on the output error of the optical fiber model, and it is also difficult to measure the insertion loss in the existing network, resulting in a low accuracy of the optical fiber model.

[0045] Further, after obtaining the adjusted Raman proportionality coefficient, if the adjusted Raman proportionality coefficient is within the value range of the Raman proportionality coefficient, output the adjusted Raman proportionality coefficient, the output insertion loss of the C-band corresponding to the adjusted Raman proportionality coefficient, and the output insertion loss of the L-band.

[0046] In this embodiment, a span loss model is constructed for the output of the amplifier in the optical link to the input of the next-stage amplifier; based on the slope of the combined wave error curve in the C-band and L-band, the current Raman proportionality coefficient of the span loss model is adjusted to obtain the adjusted Raman proportionality coefficient. It is not necessary to collect the fiber output power spectrum data that is difficult to collect in the existing network, nor is it necessary to collect a large amount of training data in advance to adjust the model parameters, which greatly reduces the difficulty of adapting the model parameters; if the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient, the input insertion loss in the C-band and the input insertion loss in the L-band are adjusted, and the insertion losses at both ends of the long fiber are also used as parameters, which can dynamically adjust the parameters according to the different states of the existing network operation and different application scenarios of the existing network, improving the freedom and accuracy of the span loss model. Through this embodiment, the technical problems of difficult adaptation of fiber model parameters and inability to guarantee accuracy in the related art are solved.

[0047] Optionally, in one embodiment, referring to Figure 4 , Figure 4 is Figure 1 a detailed flowchart of step S20 in Figure 4 As shown, step S20 includes:

[0048] Step S201, linearly fit the combined wave error in the C-band and L-band to obtain the curve slope of the combined wave error;

[0049] Step S202, if the curve slope exceeds the slope threshold, substitute the current Raman proportionality coefficient of the span loss model into the first preset formula for adjustment to obtain the preliminarily adjusted Raman proportionality coefficient;

[0050] Step S203, use the preliminarily adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the span loss model, and return to execute the step of linearly fitting the combined wave error in the C-band and L-band to obtain the curve slope of the combined wave error;

[0051] Step S204, until the number of loops is greater than the preset maximum number of loops, use the last obtained preliminarily adjusted Raman proportionality coefficient as the adjusted Raman proportionality coefficient;

[0052] Among them, the first preset formula is as follows:

[0053] g′ = g - sign(k) * r

[0054] In the formula, g′ is the preliminarily adjusted Raman proportionality coefficient, g is the Raman proportionality coefficient of the span loss model, k is the curve slope of the combined wave error in the C-band and L-band, and r is the step factor.

[0055] In this embodiment, the set input insertion loss δ of the C-band c, the input insertion loss δ in the L band L and the Raman ratio coefficient g input span loss model, and calculate the output power using the span loss model. Among them, the input insertion loss δ in the C band c and the input insertion loss δ in the L band L The initial values are set according to the standard insertion loss value of the device, generally 1.0 dB. The initial value of g is obtained by matching the input and output power spectra of the optical fiber collected in the laboratory according to the Raman gain spectrum used, and can be set to 0.45.

[0056] According to the input multiplexing power information of the next-stage optical amplifier, assuming that the output insertion losses in the C and L bands are equal, the multiplexing errors in the C and L bands of the model are obtained. Perform a linear fit on the multiplexing errors in the C and L bands to obtain the slope k of the error curve. For example, the multiplexing errors in the C and L bands are err C and err L , take the intermediate wavelengths wl c_mid and wl L_mid in the C and L bands as the abscissa, then the slope of the error curve can be calculated

[0057] Judge whether the slope of the multiplexing error curve exceeds the slope threshold. The slope threshold is determined according to the acceptable error, and can generally be set to 0.002.

[0058] If the slope of the multiplexing error curve does not exceed the slope threshold, the adjustment is completed, calculate the output insertion losses in the C band and the L band corresponding to the current Raman ratio coefficient g, and output.

[0059] If the slope of the multiplexing error curve exceeds the slope threshold, substitute the current Raman ratio coefficient of the span loss model into the first preset formula g′ = g - sign(k)*r for adjustment to obtain the preliminarily adjusted Raman ratio coefficient g′. That is, when the slope k of the multiplexing error curve exceeds the slope threshold and is positive, g is reduced by the step size r; when the slope k of the multiplexing error curve exceeds the slope threshold and is negative, g is increased by the step size r. The step size r is set according to the required accuracy and adjustment speed, and can generally be set to 0.01.

[0060] After obtaining the preliminarily adjusted Raman ratio coefficient g′, if the preliminarily adjusted Raman ratio coefficient g′ is within the value range of the Raman ratio coefficient, calculate the output insertion losses in the C band and the L band corresponding to the current Raman ratio coefficient g′, and output the current Raman ratio coefficient g′, the output insertion loss δ’ in the C band c and the output insertion loss δ’ in the L band L .

[0061] If the Raman proportionality coefficient g' after preliminary adjustment is not within the range of the Raman proportionality coefficient, then use the Raman proportionality coefficient after preliminary adjustment as the current Raman proportionality coefficient of the span loss model, and return to execute the step of linearly fitting the multiplexing error of the C-band and the L-band to obtain the curve slope of the multiplexing error, that is, readjust the currently obtained Raman proportionality coefficient. Until the number of loops is greater than the preset maximum number of loops, if the obtained Raman proportionality coefficient is still not within the range of the Raman proportionality coefficient, then use the Raman proportionality coefficient after the last preliminary adjustment as the adjusted Raman proportionality coefficient, and output the Raman proportionality coefficient g' after the last preliminary adjustment, and the corresponding output insertion loss δ' of the C-band c and the output insertion loss δ' of the L-band L .

[0062] Among them, the output insertion loss δ' of the C-band c = C-band output multiplexing power - input multiplexing power of the next-stage C optical amplifier - optical attenuation existing before the C optical amplifier; the output insertion loss δ' of the L-band L = L-band output multiplexing power - input multiplexing power of the next-stage L optical amplifier - optical attenuation existing before the L optical amplifier.

[0063] Exemplarily, a certain C+L 80-wave system has a span, its optical fiber is of G652 type, and the length is 50KM. The output multiplexing power of the previous-stage C optical amplifier can be obtained from the network management as 23dBm, and the output multiplexing power of the previous-stage L optical amplifier is 21.5dBm. Through the OPM, the corresponding single-wavelength power spectra can be collected from the MON port of the optical amplifier as and The input multiplexing power of the next-stage C optical amplifier is 4.8dBm, the input multiplexing power of the L optical amplifier is 4.0dBm, and there is an optical attenuation of 3dB before each of the C optical amplifier and the L optical amplifier.

[0064] Set the initial input insertion loss to be δ c = 1.0, δ L = 1.0, g = 0.45. According to the calculation formula of the span loss model and solving the SRS equation, the optical fiber output single-wavelength power spectra can be obtained as and Summing the single-wavelength power spectra can obtain the multiplexing of the C-band and the L-band, assuming 9.5dBm and 6.5dBm respectively. Assuming that the output insertion losses of the C-band and the L-band are equal, then the calculation of the slope of the output multiplexing error curve has nothing to do with the actual magnitude of the output insertion loss and can be directly calculated. Also, because there is optical attenuation before the next-stage optical amplifier, at this time, the output multiplexing errors of the CL-band and the L-band are respectively: err C = 9.5 - 4.8 - 3.0 = 1.7, err L = 6.5 - 4.0 - 3.0 = -0.5. Take the intermediate wavelength wl of the C-band and the L-bandc_mid = 1548, wl L_mid Taking wl = 1600 as the abscissa, the slope of the error curve can be calculated

[0065] Since abs(k) = 0.042 > 0.002, the slope of the multiplexing error curve exceeds the slope threshold, and the current Raman proportionality coefficient g needs to be adjusted. Update the current Raman proportionality coefficient with a step size r = 0.01, and obtain the preliminarily adjusted g' = 0.45 - sign(-0.042) * 0.01 = 0.44. After the update, the adjustment count is incremented by 1, and then substitute the preliminarily adjusted g' = 0.44 into the inter-span loss model to recalculate the slope k of the error curve at this time. Assuming that the maximum number of loops is 10, after 10 updates and reaching the threshold, the adjustment can be stopped. At this time, the last obtained preliminarily adjusted g' = 0.55, and k = -0.0018 is calculated. Then, substitute δ c = 0.5, δ L = 0.5, g' = 0.55 into the inter-span loss model, and calculate the output multiplexing power of the C-band and L-band to be 8.5 dBm and 7.5 dBm. The methods for solving the calculation formula of the inter-span loss model include the Runge-Kutta method, the split-step Fourier method, etc. Then, the output insertion losses of the C-band and L-band can be obtained as δ' c = 8.5 - 4.8 - 3.0 = 0.7 and δ' L = 7.5 - 4.0 - 3.0 = 0.5. At this time, the adaptive parameter adjustment is completed, and the output model parameters are δ c = 1.0, δ L = 1.0, g' = 0.55, δ' c = 0.7, δ' L = 0.5.

[0066] Through this embodiment, it is not necessary to collect the optical fiber output power spectrum data that is difficult to collect in the existing network, nor is it necessary to collect a large amount of training data in advance to adjust the model parameters, which greatly reduces the difficulty of adapting the model parameters and solves the technical problem in the related art that the optical fiber attenuation parameters in the physical model are different for different optical fibers and need to be adjusted separately, and currently, a large amount of input and output power spectrum data of optical fibers need to be collected for parameter adjustment, making it difficult to adapt the optical fiber model parameters.

[0067] Optionally, in one embodiment, refer to Figure 5 , Figure 5 is Figure 1 a detailed flow schematic diagram of step S30 in one embodiment of Figure 5 . As shown in

[0068] Step S301, increase or decrease the input insertion losses of the C-band and L-band simultaneously by the first step size;

[0069] In some specific embodiments, step S301 includes:

[0070] If the adjusted Raman proportionality coefficient is less than the minimum value of the Raman proportionality coefficient value range, the input insertion loss of the C band and the input insertion loss of the L band are simultaneously increased by a first step length;

[0071] If the adjusted Raman proportionality coefficient is greater than the maximum value of the Raman proportionality coefficient value range, the input insertion loss of the C band and the input insertion loss of the L band are simultaneously decreased by a first step length.

[0072] In this embodiment, the Raman transfer amount is also related to the input fiber power, that is, the Raman proportionality coefficient g and the input insertion loss δ c and δ L are related. For a certain input, there are multiple parameter combinations that can obtain the same output result. However, both the Raman proportionality coefficient g and the insertion loss have physical meanings, so the value ranges of the Raman proportionality coefficient g and the insertion loss need to be restricted when adjusting the parameters.

[0073] After adjusting the Raman proportionality coefficient g, a set of input insertion losses δ c and δ L are obtained as the initial values, and the adjusted Raman proportionality coefficient g' and the corresponding output insertion losses δ' c and δ' L . That is, in the case of multiplexing power matching, excluding the attenuation on the optical fiber and the SRS power transfer, the total insertion loss of the C band can be calculated as δ c +δ' c , and the total insertion losses of the L band are δ L +δ' L . For the input insertion loss, its value cannot exceed the total insertion loss and cannot be less than zero. Therefore, the minimum value of the input insertion loss of the C band and the L band is 0, and the maximum value is δ C_max =δ c +δ' c , δ L_max =δ L +δ' L .

[0074] Exemplarily, the maximum value of the Raman proportionality coefficient g is set to g max =0.5, and the minimum value is g min =0.35. Assume that in the step of adjusting the Raman proportionality coefficient g, the adjusted Raman proportionality coefficient g' = 0.55, g' > g max , which is not within the value range of the Raman proportionality coefficient. Therefore, it enters the step of adjusting the input insertion loss of the C band and the input insertion loss of the L band.

[0075] The method for adjusting the input insertion loss in the C band and the input insertion loss in the L band is as follows: First, assume that the input insertion losses in the C band and the L band are the same, that is, first increase or decrease the input insertion loss in the C band and the input insertion loss in the L band by the first step length simultaneously.

[0076] Specifically, if the adjusted Raman proportionality coefficient g′ > g max , that is, the adjusted Raman proportionality coefficient is greater than the maximum value of the Raman proportionality coefficient value range, so it is necessary to reduce the input insertion losses in the C band and the L band, and reduce the input insertion loss δ in the C band and the input insertion loss δ in the L band simultaneously by the first step length b = 0.1. c and the input insertion loss δ in the L band L , then the input insertion loss in the C band and the input insertion loss δ in the L band after reducing the first step length c = δ L = 1.0 - 0.1 = 0.9.

[0077] If the adjusted Raman proportionality coefficient g′ < g min , that is, the adjusted Raman proportionality coefficient is less than the minimum value of the Raman proportionality coefficient value range, then it is necessary to increase the input insertion losses in the C band and the L band, and increase the input insertion loss δ in the C band and the input insertion loss δ in the L band simultaneously by the first step length b = 0.1. c and the input insertion loss δ in the L band L , then the input insertion loss in the C band and the input insertion loss δ in the L band after increasing the first step length c = δ L = 1.0 + 0.1 = 1.1.

[0078] Step S302: If the input insertion losses in the C band and the L band after increasing or decreasing the first step length are both greater than zero and less than the corresponding maximum values, then calculate the slope of the combined wave error curve in the C band and the L band corresponding to the input insertion losses in the C band and the L band after increasing or decreasing the first step length, and use the adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the inter-span loss model, and return to execute the step of adjusting the current Raman proportionality coefficient of the inter-span loss model based on the slope of the combined wave error curve in the C band and the L band to obtain the adjusted Raman proportionality coefficient;

[0079] Step S303: If the adjusted Raman proportionality coefficient is within the value range of the Raman proportionality coefficient, the loop ends, and the adjusted input insertion losses in the C band and the L band are obtained.

[0080] In this embodiment, it can be seen from the Raman proportionality coefficient g adjustment step that when δ c = 1.0, δ L = 1.0, g = 0.55, δ' c = 0.7, δ' L = 0.5. Therefore, the maximum value of δ c is δC_max = δ c + δ' c = 1.0 + 0.7 = 1.7, δ L The maximum value of δ L_max = δ L + δ' L = 1.0 + 0.5 = 1.5. δ c and δ L will not be less than 0, so δ c The minimum value of δ C_min = 0, δ L The minimum value of δ is L_min = 0.

[0081] If the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length are both greater than zero and less than the corresponding maximum values, then use the adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the inter-span loss model, return to execute the slope of the combined-wave error curve based on the C-band and the L-band, adjust the current Raman proportionality coefficient of the inter-span loss model to obtain the adjusted Raman proportionality coefficient, that is, use the adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the inter-span loss model, calculate the slopes of the combined-wave error curves of the C-band and the L-band corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length, and re-adjust the Raman proportionality coefficient.

[0082] If the re-adjusted Raman proportionality coefficient is still not within the range of the Raman proportionality coefficient, then continue to adjust the input insertion loss of the C-band and the input insertion loss of the L-band. That is, if the re-adjusted Raman proportionality coefficient is still greater than the maximum value g of the range of the Raman proportionality coefficient max , then continue to decrease the input insertion loss of the C-band and the L-band; if the re-adjusted Raman proportionality coefficient is less than the minimum value g of the range of the Raman proportionality coefficient min , then continue to increase the input insertion loss of the C-band and the L-band.

[0083] If the re-adjusted Raman proportionality coefficient is within the range of the Raman proportionality coefficient, that is, the re-adjusted Raman proportionality coefficient is greater than the minimum value of the range of the Raman proportionality coefficient and less than the maximum value of the range of the Raman proportionality coefficient, then the loop ends, that is, the adjustment of the input insertion loss of the C-band and the input insertion loss of the L-band is completed, and the parameters at this time are output, that is, the input insertion loss of the C-band after reducing the first step length, the input insertion loss of the L-band after reducing the first step length, the re-adjusted Raman proportionality coefficient, and the corresponding output insertion loss δ' of the C-band c and the output insertion loss δ' of the L-band L .

[0084] Optionally, in one embodiment, referring to Figure 6 ,Figure 6 For Figure 1 a detailed flowchart of another embodiment of step S30 in [description]. As Figure 6 shown, after step S301, it includes:

[0085] Step S304, if the input insertion loss of the C band and / or the input insertion loss of the L band after increasing or decreasing the first step length is less than or equal to zero, or greater than or equal to the corresponding maximum value, then determine the parameter adjustment range of the input insertion loss of the L band based on the adjusted Raman proportionality coefficient;

[0086] In some specific embodiments, determining the parameter adjustment range of the input insertion loss of the L band based on the adjusted Raman proportionality coefficient includes:

[0087] If the adjusted Raman proportionality coefficient is less than the minimum value of the Raman proportionality coefficient value range, then determine the parameter adjustment range of the input insertion loss of the L band as (0, min(δ L_max , δ c ));

[0088] If the adjusted Raman proportionality coefficient is greater than the maximum value of the Raman proportionality coefficient value range, then determine the parameter adjustment range of the input insertion loss of the L band as (δ c , δ L_max );

[0089] Wherein, δ L_max represents the maximum value of the input insertion loss of the L band, and δ c represents the input insertion loss of the C band.

[0090] In this embodiment, if the input insertion loss of the C band and / or the input insertion loss of the L band after increasing or decreasing the first step length is less than or equal to zero, or greater than or equal to the corresponding maximum value, that is, after adjusting the input insertion loss of the C band and the L band, if it does not satisfy 0 < δ c < δ C_max and 0 < δ L < δ L_max , then enter the parameter adjustment process assuming that the input insertion losses of the C band and the L band are inconsistent.

[0091] Specifically, assume that when adjusted to δ c = δ L = 0.1, re-adjust the Raman proportionality coefficient based on δ c = δ L = 0.1. If the obtained adjusted Raman proportionality coefficient is still greater than the maximum value of the Raman proportionality coefficient value range, at this time, it is still necessary to simultaneously reduce the input insertion loss δ c of the C band and the input insertion loss δ L of the L band with the first step length b = 0.1, and the next round of δ c=δ L =0.1-0.1=0, does not satisfy 0<δ c <δ c_max And 0<δ L <δ L_max , so the parameter adjustment process is entered assuming that the input insertion losses of the C-band and L-band are inconsistent.

[0092] First, determine the C-band input insertion loss δ c The parameter adjustment range is (0,δ C_max ), that is (0,1.7). If the second step length is 0.1, then first fix the input insertion loss δ of the C band c =0.1, and then the input insertion loss of L band L Adjust. L-band input insertion loss δ L The parameter adjustment range is determined based on the adjusted Raman proportional coefficient.

[0093] That is, if the adjusted Raman proportional coefficient is less than the minimum value of the Raman proportional coefficient value range, the parameter adjustment range of the input insertion loss of the L band is determined to be (0, min (δ L_max ,δ c )); If the adjusted Raman proportional coefficient is greater than the maximum value of the Raman proportional coefficient value range, the parameter adjustment range of the input insertion loss of the L band is determined to be (δ c , δ L_max ). Among them, δ L_max Indicates the maximum value of the input insertion loss in the L band, δ c Indicates the input insertion loss of the C band.

[0094] Step S305, within the parameter adjustment range corresponding to the input insertion loss of the C-band, every time the input insertion loss of the C-band increases by the second step length, the input insertion loss of the L-band is traversed once within the parameter adjustment range of the input insertion loss of the L-band with the third step length, and the Raman proportional coefficient corresponding to each group of the input insertion loss of the C-band and the input insertion loss of the L-band is calculated in sequence;

[0095] Step S306, until there is a group of Raman proportional coefficients corresponding to the input insertion loss of the C band and the input insertion loss of the L band within the value range of the Raman proportional coefficient, then the group of C band input insertion loss and L band input insertion loss are used as the adjusted C band input insertion loss and L band input insertion loss.

[0096] In this embodiment, the input insertion loss δ in the C band c The corresponding parameter adjustment range (0, δ C_max ), that is, (0, 1.7). If the second step length η1 = 0.1, then first fix the input insertion loss δ of the C band c= 0.1. If the adjusted Raman proportion coefficient is less than the minimum value of the Raman proportion coefficient value range, the input insertion loss of the L band is within (0, min(δ L_max , δ c )) and traverses once with the third step size η2 = 0.05. Since δ L_max = 1.5, δ c = 0.1, therefore, after fixing the input insertion loss δ c = 0.1 of the C band, the input insertion loss of the L band traverses within the range of (0, 0.1), and a set of input insertion losses of the C band and the input insertion loss of the L band are obtained as δ c = 0.1, δ L = 0.05, and another set of input insertion losses of the C band and the input insertion loss of the L band are δ c = 0.1, δ L = 0.1. Then, calculate the Raman proportion coefficients corresponding to δ c = 0.1, δ L = 0.05 in sequence, and the Raman proportion coefficients corresponding to δ c = 0.1, δ L = 0.1.

[0097] If the Raman proportion coefficients corresponding to δ c = 0.1, δ L = 0.05, and the Raman proportion coefficients corresponding to δ c = 0.1, δ L = 0.1 are not within the Raman proportion coefficient value range, the input insertion loss of the C band increases by the second step size, fix the input insertion loss δ c = 0.2 of the C band, the input insertion loss of the L band traverses within the range of (0, 0.1) again, and calculate the Raman proportion coefficients corresponding to δ c = 0.2, δ L = 0.05 in sequence, and the Raman proportion coefficients corresponding to δ c = 0.2, δ L = 0.1.

[0098] In another embodiment, if the adjusted Raman proportion coefficient is greater than the maximum value of the Raman proportion coefficient value range, the input insertion loss of the L band traverses once within (δ c , δ L_max ) with the third step size η2 = 0.05. Since δ L_max = 1.5, δ c = 0.1, therefore, after fixing the input insertion loss δ c = 0.1 of the C band, the input insertion loss of the L band traverses within the range of (0.1, 1.5). Multiple sets of input insertion losses of the C band and the input insertion loss of the L band are obtained as {(δ c = 0.1, δ L= 0.1), (δ c = 0.1, δ L = 0.15), (δ c = 0.1, δ L = 0.2), ..., (δ c = 0.1, δ L = 1.5)}. And calculate the Raman proportionality coefficients corresponding to the input insertion loss of each C-band and the input insertion loss of the L-band in turn.

[0099] And so on until there is a set of Raman proportionality coefficients corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band within the value range of the Raman proportionality coefficient. Then, use the input insertion loss of the C-band and the input insertion loss of the L-band as the adjusted input insertion loss of the C-band and the input insertion loss of the L-band. Exemplarily, when traversing to δ c = 0.1, δ L = 0.5, based on δ c = 0.1, δ L = 0.5, adjust the Raman proportionality coefficient to obtain the adjusted Raman proportionality coefficient g' = 0.48. The maximum value of the Raman proportionality coefficient g is g max = 0.5, and the minimum value is g min = 0.35. The adjusted Raman proportionality coefficient is within the value range of the Raman proportionality coefficient, that is, there is a set of Raman proportionality coefficients corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band within the value range of the Raman proportionality coefficient. Then, the input insertion loss of the C-band and the input insertion loss of the L-band are adjusted, and use the input insertion loss of the C-band and the input insertion loss of the L-band (δ c = 0.1, δ L = 0.5) as the adjusted input insertion loss of the C-band and the input insertion loss of the L-band. And output the Raman proportionality coefficient corresponding to δ c = 0.1, δ L = 0.5, the output insertion loss δ' of the C-band c and the output insertion loss δ' of the L-band L .

[0100] In another embodiment, when adjusting the input insertion loss of the C-band and the input insertion loss of the L-band, if it is first assumed that the input insertion losses of the C-band and the L-band are inconsistent, then when the parameter adjustment ranges of the input insertion loss δ of the C-band c and the parameter adjustment range of the input insertion loss δ of the L-band L have both been traversed, if there is still no set of Raman proportionality coefficients corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band within the value range of the Raman proportionality coefficient, then enter the parameter adjustment process assuming that the input insertion losses of the C-band and the L-band are consistent.

[0101] In a second aspect, an embodiment of the present invention further provides a device for adjusting cross-segment loss model parameters.

[0102] In one embodiment, referring to Figure 7 , Figure 7 is a schematic diagram of the functional modules of an embodiment of the device for adjusting cross-segment loss model parameters of the present invention. As Figure 7 shown, the device for adjusting cross-segment loss model parameters includes:

[0103] A model construction module 10, configured to construct a cross-segment loss model for the output of the amplifier in the optical link to the input of the next-stage amplifier;

[0104] A first parameter adjustment module 20, configured to adjust the current Raman proportionality coefficient of the cross-segment loss model based on the slope of the combined-wave error curve in the C band and the L band to obtain an adjusted Raman proportionality coefficient;

[0105] A second parameter adjustment module 30, configured to adjust the input insertion loss in the C band and the input insertion loss in the L band if the adjusted Raman proportionality coefficient is not within the value range of the Raman proportionality coefficient.

[0106] Optionally, in one embodiment, the calculation expression of the cross-segment loss model is:

[0107]

[0108] In the formula, is the actual C-band input power spectrum of the optical fiber, is the output single-wave power spectrum of the previous-stage C optical amplifier, δ C is the input insertion loss in the C band, is the actual L-band input power spectrum of the optical fiber, is the output single-wave power spectrum of the previous-stage L optical amplifier, δ L is the input insertion loss in the L band, is the actual C-band output power spectrum of the optical fiber, is the actual L-band output power spectrum of the optical fiber, g is the Raman proportionality coefficient, G R is the Raman gain spectrum, ρ is the optical fiber attenuation spectrum, SRS() is the SRS equation, is the input single-wave power spectrum of the next-stage C optical amplifier, δ' c is the output insertion loss in the C band, is the input single-wave power spectrum of the next-stage L optical amplifier, δ' L is the output insertion loss in the L band.

[0109] Optionally, in one embodiment, the first parameter adjustment module 20 is specifically configured to:

[0110] Perform a linear fit on the multiplexing error of the C-band and the L-band to obtain the curve slope of the multiplexing error;

[0111] If the curve slope exceeds the slope threshold, substitute the current Raman proportionality coefficient of the span loss model into the first preset formula for adjustment to obtain a preliminarily adjusted Raman proportionality coefficient;

[0112] Use the preliminarily adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the span loss model, and return to execute the step of performing a linear fit on the multiplexing error of the C-band and the L-band to obtain the curve slope of the multiplexing error;

[0113] Until the number of loops is greater than the preset maximum number of loops, use the last obtained preliminarily adjusted Raman proportionality coefficient as the adjusted Raman proportionality coefficient;

[0114] Wherein, the first preset formula is as follows:

[0115] g′ = g - sign(k) * r

[0116] In the formula, g′ is the preliminarily adjusted Raman proportionality coefficient, g is the Raman proportionality coefficient of the span loss model, k is the curve slope of the multiplexing error of the C-band and the L-band, and r is the step factor.

[0117] Optionally, in an embodiment, the second parameter adjustment module 30 is specifically configured to:

[0118] Increase or decrease the input insertion loss of the C-band and the input insertion loss of the L-band by the first step length simultaneously;

[0119] If the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length are both greater than zero and less than the corresponding maximum values, calculate the curve slope of the multiplexing error of the C-band and the L-band corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length, and use the adjusted Raman proportionality coefficient as the current Raman proportionality coefficient of the span loss model, and return to execute the step of adjusting the current Raman proportionality coefficient of the span loss model based on the curve slope of the multiplexing error of the C-band and the L-band to obtain the adjusted Raman proportionality coefficient;

[0120] If the adjusted Raman proportionality coefficient is within the value range of the Raman proportionality coefficient, the loop ends, and the adjusted input insertion loss of the C-band and the input insertion loss of the L-band are obtained.

[0121] Optionally, in an embodiment, the second parameter adjustment module 30 is specifically configured to:

[0122] If the adjusted Raman proportionality coefficient is less than the minimum value of the value range of the Raman proportionality coefficient, increase the input insertion loss of the C-band and the input insertion loss of the L-band by the first step length simultaneously;

[0123] If the adjusted Raman proportionality coefficient is greater than the maximum value of the Raman proportionality coefficient value range, the input insertion loss of the C band and the input insertion loss of the L band are simultaneously reduced by the first step length.

[0124] Optionally, in one embodiment, the second parameter adjustment module 30 is specifically configured to:

[0125] If the input insertion loss of the C band and / or the input insertion loss of the L band after increasing or decreasing the first step length is less than or equal to zero, or greater than or equal to the corresponding maximum value, determine the parameter adjustment range of the input insertion loss of the L band based on the adjusted Raman proportionality coefficient;

[0126] Within the parameter adjustment range corresponding to the input insertion loss of the C band, for each increase of the second step length in the input insertion loss of the C band, the input insertion loss of the L band traverses once within the parameter adjustment range of the input insertion loss of the L band at the third step length, and the Raman proportionality coefficients corresponding to each group of the input insertion loss of the C band and the input insertion loss of the L band are calculated in turn;

[0127] Until there is a set of Raman proportionality coefficients corresponding to the input insertion loss of the C band and the input insertion loss of the L band within the Raman proportionality coefficient value range, use this set of input insertion losses of the C band and the L band as the adjusted input insertion losses of the C band and the L band.

[0128] Optionally, in one embodiment, the second parameter adjustment module 30 is specifically configured to:

[0129] If the adjusted Raman proportionality coefficient is less than the minimum value of the Raman proportionality coefficient value range, determine the parameter adjustment range of the input insertion loss of the L band as (0, min(δ L_max , δ c ));

[0130] If the adjusted Raman proportionality coefficient is greater than the maximum value of the Raman proportionality coefficient value range, determine the parameter adjustment range of the input insertion loss of the L band as (δ c , δ L_max );

[0131] Wherein, δ L_max represents the maximum value of the input insertion loss of the L band, and δ c represents the input insertion loss of the C band.

[0132] Wherein, the function implementation of each module in the above cross-section loss model parameter adjustment device corresponds to each step in the above cross-section loss model parameter adjustment method embodiment, and its function and implementation process will not be elaborated here one by one.

[0133] In a third aspect, an embodiment of the present invention further provides an electronic device, the structure of which is asFigure 8 As shown, it includes: a memory and a processor, and the processor is configured to read and execute the computer program stored in the memory to implement the foregoing method for adjusting cross-segment loss model parameters.

[0134] In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed, the foregoing method for adjusting cross-segment loss model parameters is implemented.

[0135] In a fifth aspect, an embodiment of the present invention provides a computer program product. The program product is stored in a storage medium and is executed by at least one processor to implement each process of the foregoing embodiment of the method for adjusting cross-segment loss model parameters, and can achieve the same technical effects. To avoid repetition, it will not be elaborated here.

[0136] Finally, it should be noted that in some processes described in the embodiments of the present invention, a plurality of operations or steps appear in a specific order. However, it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present invention or may be executed in parallel. The serial numbers of the operations are only used to distinguish different operations, and the serial numbers themselves do not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0137] The foregoing is only the preferred embodiment of the present invention and is not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting parameters of a cross-segment loss model, characterized in that: The method comprises: Construct a cross-section loss model for the output of an amplifier in an optical link to the input of the next amplifier; Based on the slope of the combined wave error curve of the C band and the L band, the current Raman proportional coefficient of the cross-band loss model is adjusted to obtain the adjusted Raman proportional coefficient; If the adjusted Raman proportional coefficient is not within the value range of the Raman proportional coefficient, the input insertion loss of the C band and the input insertion loss of the L band are adjusted.

2. The method for adjusting the parameters of the cross-segment loss model according to claim 1, characterized in that: The calculation expression of the cross-section loss model is: In the formula, is the actual C-band input power spectrum of the optical fiber, is the output single-wave power spectrum of the previous stage C optical amplifier, δ C is the input insertion loss of C band, is the actual L-band input power spectrum of the optical fiber, is the output single-wave power spectrum of the previous L-type optical amplifier, δ L is the input insertion loss of L band, is the actual C-band output power spectrum of the optical fiber, is the actual L-band output power spectrum of the optical fiber, g is the Raman proportional coefficient, G R is the Raman gain spectrum, ρ is the fiber attenuation spectrum, SRS() is the SRS equation, is the input single-wave power spectrum of the next-stage C optical amplifier, δ' c is the output insertion loss of C-band, is the input single-wave power spectrum of the next-stage L optical amplifier, δ' L is the output insertion loss of L band.

3. The method for adjusting the parameters of the cross-segment loss model according to claim 1, characterized in that: The current Raman proportional coefficient of the cross-band loss model is adjusted based on the slope of the combined wave error curve of the C band and the L band to obtain the adjusted Raman proportional coefficient, including: Performing linear fitting on the combined wave errors of the C band and the L band to obtain the slope of the combined wave error curve; If the slope of the curve exceeds the slope threshold, the current Raman proportional coefficient of the cross-segment loss model is substituted into the first preset formula for adjustment to obtain a preliminarily adjusted Raman proportional coefficient; Using the initially adjusted Raman proportional coefficient as the current Raman proportional coefficient of the cross-band loss model, returning to the step of performing linear fitting on the combined wave errors of the C band and the L band to obtain the slope of the curve of the combined wave error; When the number of cycles is greater than the preset maximum number of cycles, the Raman proportional coefficient obtained after the last preliminary adjustment is used as the adjusted Raman proportional coefficient; Among them, the first preset formula is as follows: g′=g-sign(k)*r Where g′ is the Raman proportional coefficient after preliminary adjustment, g is the Raman proportional coefficient of the cross-band loss model, k is the slope of the combined error curve of the C-band and L-band, and r is the step size factor.

4. The method for adjusting the parameters of the cross-segment loss model according to claim 1, characterized in that: The adjusting of the input insertion loss of the C band and the input insertion loss of the L band includes: Increase or decrease the first step length of the input insertion loss of the C band and the input insertion loss of the L band simultaneously; If the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length are both greater than zero and less than the corresponding maximum value, then the slopes of the combined error curves of the C-band and the L-band corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band after increasing or decreasing the first step length are calculated, and the adjusted Raman proportional coefficient is used as the current Raman proportional coefficient of the cross-band loss model, and the step of adjusting the current Raman proportional coefficient of the cross-band loss model based on the slope of the combined error curve of the C-band and the L-band to obtain the adjusted Raman proportional coefficient is returned to execute; If the adjusted Raman proportional coefficient is within the value range of the Raman proportional coefficient, the cycle ends, and the adjusted C-band input insertion loss and L-band input insertion loss are obtained.

5. The method for adjusting the parameters of the cross-segment loss model according to claim 4, characterized in that: The step of simultaneously increasing or decreasing the first step of the input insertion loss of the C band and the input insertion loss of the L band comprises: If the adjusted Raman proportional coefficient is less than the minimum value of the Raman proportional coefficient value range, the input insertion loss of the C band and the input insertion loss of the L band are increased by the first step length at the same time; If the adjusted Raman proportional coefficient is greater than the maximum value of the Raman proportional coefficient value range, the input insertion loss of the C band and the input insertion loss of the L band are simultaneously reduced by the first step length.

6. The method for adjusting the parameters of the cross-segment loss model according to claim 4, characterized in that: After the first step of simultaneously increasing or decreasing the input insertion loss of the C-band and the input insertion loss of the L-band, the method further comprises: If the input insertion loss of the C-band and / or the input insertion loss of the L-band after increasing or decreasing the first step length is less than or equal to zero, or greater than or equal to the corresponding maximum value, then determining the parameter adjustment range of the input insertion loss of the L-band based on the adjusted Raman proportional coefficient; Within the parameter adjustment range corresponding to the input insertion loss of the C-band, every time the input insertion loss of the C-band increases by the second step length, the input insertion loss of the L-band is traversed once within the parameter adjustment range of the input insertion loss of the L-band with the third step length, and the Raman proportional coefficient corresponding to each group of the input insertion loss of the C-band and the input insertion loss of the L-band is calculated in turn; Until there is a group of Raman proportional coefficients corresponding to the input insertion loss of the C-band and the input insertion loss of the L-band within the value range of the Raman proportional coefficient, the group of C-band input insertion loss and L-band input insertion loss are used as the adjusted C-band input insertion loss and L-band input insertion loss.

7. The method for adjusting the parameters of the cross-section loss model according to claim 6, characterized in that: The step of determining the parameter adjustment range of the input insertion loss of the L band based on the adjusted Raman proportional coefficient includes: If the adjusted Raman proportional coefficient is less than the minimum value of the Raman proportional coefficient value range, the parameter adjustment range of the input insertion loss of the L band is determined to be (0, min (δ L_max ,δ c )); If the adjusted Raman proportional coefficient is greater than the maximum value of the Raman proportional coefficient value range, the parameter adjustment range of the input insertion loss of the L band is determined to be (δ c , δ L_max ); Among them, δ L_max Indicates the maximum value of the input insertion loss in the L band, δ c Indicates the input insertion loss of the C band.

8. A device for adjusting parameters of a cross-segment loss model, characterized in that: The device comprises: A model building module is configured to build a cross-section loss model for the output of an amplifier to the input of a next-stage amplifier in an optical link; The first parameter adjustment module is configured to adjust the current Raman proportional coefficient of the cross-band loss model based on the slope of the combined wave error curve of the C band and the L band to obtain the adjusted Raman proportional coefficient; The second parameter adjustment module is configured to adjust the input insertion loss of the C band and the input insertion loss of the L band if the adjusted Raman proportional coefficient is not within the value range of the Raman proportional coefficient.

9. An electronic device, characterized in that: include: Memory and processor; The processor is used to read and execute the computer program stored in the memory to implement the steps of the cross-segment loss model parameter adjustment method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed, the steps of the method for adjusting the parameters of the cross-segment loss model as described in any one of claims 1-7 are implemented.

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