Adjustable all-optical shaper, parameter determination method and device of adjustable all-optical shaper

Abstract

The embodiment of the present application provides a kind of adjustable all-optical shaper, adjustable all-optical shaper parameter determination method and device.The shaper includes: MZI shaping module, first directional coupler and second directional coupler;MZI shaping module includes: upper arm and lower arm;The output end of first directional coupler is connected with the input end of MZI shaping module respectively;Upper arm includes: nonlinear optical fiber and adjustable optical phase shifter, for the nonlinear phase shift of one of the two optical signals in nonlinear optical fiber, and the phase shift of one optical signal after nonlinear phase shift is carried out by adjustable optical phase shifter with preset phase shift value;Lower arm includes: linear optical fiber, for the linear phase shift of one of the two optical signals in linear optical fiber;The input end of second directional coupler is connected with the upper arm and the lower arm of MZI shaping module.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology, and in particular to an adjustable all-optical shaper, a method for determining the parameters of the adjustable all-optical shaper, and an apparatus. Background Technology

[0002] In optical fiber communication systems, optical signals are susceptible to degradation during transmission due to factors such as fiber dispersion, ASE noise accumulation in optical amplifiers, and interactions between channels. This degradation ultimately limits the transmission rate and distance of the system and network. To ensure reliable information transmission in the network, it is necessary to regenerate the degraded signal in a timely manner.

[0003] In related technologies, a shaper is used to regenerate the degraded signal, obtaining a shaped signal to ensure effective transmission in the optical fiber communication system. However, the shaping range of the shaper is relatively fixed, limiting its flexibility. Summary of the Invention

[0004] This invention provides an adjustable all-light shaper, a method, apparatus, device, and storage medium for determining the parameters of the adjustable all-light shaper.

[0005] The technical solution of this invention is implemented as follows:

[0006] In a first aspect, embodiments of the present invention provide an adjustable all-optical shaper, comprising:

[0007] MZI shaping module, first directional coupler and second directional coupler; wherein, the MZI shaping module includes: an upper arm and a lower arm arranged parallel to the upper arm;

[0008] The output of the first directional coupler is connected to the input of the MZI shaping module, and is used to decompose the input optical signal into two optical signals, which are respectively input to the upper arm and the lower arm of the MZI shaping module.

[0009] The upper arm includes: a nonlinear optical fiber and a tunable optical phase shifter connected to the nonlinear optical fiber, used to perform nonlinear phase shift on one of the two optical signals through the nonlinear optical fiber, and to perform a preset phase shift on the nonlinearly phase-shifted optical signal through the tunable optical phase shifter;

[0010] The lower arm includes a linear optical fiber, used to perform a linear phase shift on one of the two optical signals through the linear optical fiber;

[0011] The input end of the second directional coupler is connected to the upper arm and the lower arm of the MZI shaping module to couple the two optical signals output by the upper arm and the lower arm to obtain the shaped optical signal.

[0012] Optionally, the reshaping differential gain of the adjustable all-optical shaper is:

[0013]

[0014] Wherein, 'a' is the first coefficient, 0 < a < 1; 'y' is the second parameter; b is the second coefficient, b > 0; p in The power of the input optical signal; This represents the linear phase shift difference of the MZI shaping module.

[0015] Optionally, the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber have the following relationship:

[0016]

[0017] Wherein, R1 is the amplitude transmission coefficient of the nonlinear optical fiber in the upper arm of the MZI shaping module; R2 is the amplitude transmission coefficient of the linear optical fiber in the lower arm of the MZI shaping module; k is a third coefficient, and... ρ1 is the pass-through efficiency of the first directional coupler, and ρ2 is the pass-through efficiency of the second directional coupler;

[0018] The phase shift difference of the MZI shaping module has the following relationship with the power of the input optical signal:

[0019]

[0020] Among them, the The phase shift difference of the MZI shaping module; The phase shift corresponding to the upper arm of the MZI shaping module; The phase shift corresponding to the lower arm of the MZI shaping module; The nonlinear phase shift difference generated by the MZI shaping module, The This represents the linear phase shift difference of the MZI shaping module.

[0021] Secondly, embodiments of the present invention provide a method for determining the parameters of an adjustable all-optical shaper, wherein the adjustable all-optical shaper is an adjustable all-optical shaper of one or more of the above-mentioned schemes, and the method includes:

[0022] The reference optical signal is determined based on the preset shaping conditions of the adjustable all-optical shaper;

[0023] Based on the reference optical signal and the input optical signal, determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions;

[0024] Based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient and the parameters of the upper and lower arms of the MZI shaping module are determined.

[0025] Based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms, the parameters of the first and second directional couplers of the adjustable all-optical shaper are determined.

[0026] Based on the input optical signal, the reference optical signal, and the second coefficient, the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal is determined.

[0027] Optionally, determining the reshaping differential gain of the adjustable all-optical shaper that satisfies preset shaping conditions based on the reference optical signal and the input optical signal includes:

[0028] Based on the reference optical signal and the input optical signal, determine the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal;

[0029] Based on the first coefficient, the second coefficient, and the preset phase shift value, the first reshaping differential gain corresponding to the input optical signal is determined;

[0030] Based on the first reshaping differential gain, the first jitter suppression ratio corresponding to the adjustable all-optical shaper is determined; wherein, the first jitter suppression ratio is: r1 = -10log 10 |g1|; r1 is the first jitter suppression ratio; g1 is the first reshaping differential gain;

[0031] If the first jitter suppression ratio satisfies the preset shaping condition, the first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping condition.

[0032] Optionally, determining the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal based on the reference optical signal and the input optical signal includes:

[0033] Determine the first coefficient and the second reshaping differential gain corresponding to the first coefficient;

[0034] Based on the second reshaping differential gain, the second jitter suppression ratio corresponding to the reference optical signal is determined; wherein, the second jitter suppression ratio is: r2 = -10log 10|g2|; r2 is the second jitter suppression ratio; g2 is the second reshaping differential gain;

[0035] If the second jitter suppression ratio meets the preset shaping condition, the second coefficient is determined;

[0036] Based on the reference optical signal, the input optical signal, and the second coefficient, a preset phase shift value for the tunable optical phase shifter corresponding to the input optical signal is determined.

[0037] Optionally, the second reshaping differential gain satisfies:

[0038] g2 = 1 + acosx - axsinx;

[0039] Wherein, g2 is the second reshaping differential gain; a is the first coefficient; and x is the first parameter corresponding to the reference optical signal, x = bp′ in The p′ in The power of the reference optical signal is denoted as .

[0040] Optionally, determining the second coefficient if the second jitter suppression ratio satisfies the preset shaping condition includes:

[0041] If the second jitter suppression ratio meets the preset shaping condition, a first parameter that meets the preset shaping condition is determined based on the second jitter suppression ratio;

[0042] The second coefficient is determined based on the first parameter;

[0043] Wherein, the second coefficient satisfies: b = x / p′ in b is the second coefficient; x is the first parameter corresponding to the reference optical signal; p′ in The power of the reference optical signal is denoted as .

[0044] Optionally, determining the preset phase shift value corresponding to the input optical signal includes:

[0045] The power difference is determined based on the reference optical signal and the input optical signal;

[0046] The linear phase shift difference of the MZI shaping module is determined based on the power difference and the second coefficient.

[0047] The preset phase shift value of the adjustable optical phase shifter is determined based on the linear phase shift difference and the second phase shift corresponding to the lower arm;

[0048] Wherein, the linear phase shift difference satisfies: The The linear phase shift difference; the Δpin The power difference, Δp in =p in -p′ in .

[0049] Optionally, the method further includes:

[0050] If the first jitter suppression ratio does not meet the preset shaping condition, the first reshaping differential gain is parameter-corrected.

[0051] The corrected first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions.

[0052] Optionally, the parameters of the upper and lower arms of the MZI shaping module include: amplitude transmission coefficient and length;

[0053] The step of determining the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper includes:

[0054] Based on the first coefficient, a third coefficient that satisfies the amplitude transmission coefficient constraint condition is determined, as well as the amplitude transmission coefficient of the nonlinear fiber in the upper arm and the amplitude transmission coefficient of the linear fiber in the lower arm.

[0055] Based on the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber, the lengths of the nonlinear optical fiber and the linear optical fiber that satisfy the length constraint condition are determined.

[0056] The constraint condition for the amplitude transmission coefficient is as follows:

[0057]

[0058] R1 is the amplitude transmission coefficient of the nonlinear optical fiber; R2 is the amplitude transmission coefficient of the linear optical fiber; k is the third coefficient; a is the first coefficient;

[0059] The length constraint condition is:

[0060]

[0061] L1 is the length of the nonlinear optical fiber; α1 is the attenuation coefficient of the nonlinear optical fiber;

[0062]

[0063] L2 is the length of the linear optical fiber; α2 is the attenuation coefficient of the linear optical fiber.

[0064] Optionally, determining the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient, the third coefficient, and the parameters of the upper and lower arms in the reshaping differential gain of the adjustable all-optical shaper includes:

[0065] The pass-through efficiency of the first directional coupler is determined based on the second coefficient and the amplitude transmission coefficient of the nonlinear optical fiber.

[0066] The pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler.

[0067] The second coefficient, the amplitude transmission coefficient of the nonlinear optical fiber, and the through-pass efficiency of the first directional coupler have the following relationship:

[0068] γρ1(1-R1 2 )=bα1;

[0069] γ is the nonlinear coefficient of the nonlinear optical fiber; ρ1 is the pass-through efficiency of the first directional coupler;

[0070] The third coefficient, the pass-through efficiency of the first directional coupler, and the pass-through efficiency of the second directional coupler have the following relationship:

[0071]

[0072] ρ1 is the pass-through efficiency of the first directional coupler, and ρ2 is the pass-through efficiency of the second directional coupler.

[0073] Thirdly, embodiments of the present invention provide a parameter determination device for an adjustable all-light shaper, wherein the adjustable all-light shaper is an adjustable all-light shaper of one or more of the above-mentioned schemes, and the device includes:

[0074] The gain determination module is used to determine a reference optical signal based on the preset shaping conditions of the adjustable all-optical shaper; and to determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions based on the reference optical signal and the input optical signal.

[0075] The parameter determination module is used to determine the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; to determine the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; and to determine the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal based on the input optical signal, the reference optical signal, and the second coefficient.

[0076] Fourthly, embodiments of the present invention provide an electronic device, comprising:

[0077] Memory, used to store executable instructions;

[0078] The processor, when executing executable instructions stored in the memory, implements the parameter determination method for the adjustable all-light shaper as provided by one or more of the aforementioned technical solutions.

[0079] Fifthly, embodiments of the present invention provide a computer-readable storage medium, characterized in that the computer-readable storage medium stores executable instructions, which, when executed by a processor, implement the parameter determination method for an adjustable all-optical shaper as provided by one or more of the foregoing technical solutions.

[0080] The present invention provides an adjustable all-light shaper, a method for determining the adjustable all-light shaper, an apparatus, a device, and a storage medium. The adjustable all-optical shaper includes: an MZI shaping module, a first directional coupler, and a second directional coupler; wherein, the MZI shaping module includes: an upper arm and a lower arm arranged parallel to the upper arm; the output end of the first directional coupler is connected to the input end of the MZI shaping module, and is used to decompose the input optical signal into two optical signals, which are respectively input to the upper arm and the lower arm of the MZI shaping module; the upper arm includes: a nonlinear optical fiber and an adjustable optical phase shifter connected to the nonlinear optical fiber, used to perform nonlinear phase shift on one of the two optical signals through the nonlinear optical fiber, and to perform a preset phase shift on the nonlinearly phase-shifted optical signal through the adjustable optical phase shifter; the lower arm includes: a linear optical fiber, used to perform linear phase shift on one of the two optical signals through the linear optical fiber; the input end of the second directional coupler is connected to the upper arm and the lower arm of the MZI shaping module, and is used to couple the two optical signals output by the upper arm and the lower arm to obtain the shaped optical signal.

[0081] Based on the reshaping differential gain of the adjustable all-optical shaper, the parameters of the adjustable all-optical shaper are optimized to improve its shaping performance. By adjusting the preset phase shift value of the adjustable optical phase shifter, not only can the working range of the shaper be flexibly adjusted, but the shaping performance of the shaper can also be further optimized, realizing signal shaping within a continuous power range. Attached Figure Description

[0082] Figure 1 This is a schematic diagram of the structure of an adjustable all-light shaper provided in an embodiment of the present invention;

[0083] Figure 2This is a flowchart illustrating a method for determining the parameters of an adjustable all-light shaper according to an embodiment of the present invention;

[0084] Figure 3 This is a reshaping differential gain curve provided in an embodiment of the present invention;

[0085] Figure 4 This is a schematic diagram of the structure of a parameter determination device for an adjustable all-light shaper provided in an embodiment of the present invention. Detailed Implementation

[0086] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0087] The following is an embodiment of the present invention providing an adjustable all-optical shaper, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of an adjustable all-light shaping device provided in an embodiment of the present invention. The shaping device includes:

[0088] MZI shaping module, first directional coupler and second directional coupler; wherein, the MZI shaping module includes: an upper arm and a lower arm arranged parallel to the upper arm;

[0089] The output of the first directional coupler is connected to the input of the MZI shaping module, and is used to decompose the input optical signal into two optical signals, which are respectively input to the upper arm and the lower arm of the MZI shaping module.

[0090] The upper arm includes: a nonlinear optical fiber and a tunable optical phase shifter connected to the nonlinear optical fiber, used to perform nonlinear phase shift on one of the two optical signals through the nonlinear optical fiber, and to perform a preset phase shift on the nonlinearly phase-shifted optical signal through the tunable optical phase shifter;

[0091] The lower arm includes a linear optical fiber, used to perform a linear phase shift on one of the two optical signals through the linear optical fiber;

[0092] The input end of the second directional coupler is connected to the upper arm and the lower arm of the MZI shaping module to couple the two optical signals output by the upper arm and the lower arm to obtain the shaped optical signal.

[0093] In this embodiment of the invention, the MZI shaping module is used to re-amplify and reshape the input optical signal; the MZI shaping module includes: an upper arm and a lower arm arranged parallel to the upper arm; wherein, the upper arm includes: a nonlinear optical fiber and an adjustable optical phase shifter connected to the nonlinear optical fiber, through which the optical signal input to the upper arm is nonlinearly phase-shifted; and through the adjustable optical phase shifter, the lower arm is used to linearly phase-shift the optical signal input to the lower arm; the optical signals output from the upper arm and the lower arm are input to a second directional coupler, and two-beam interference occurs in the second directional coupler to obtain the shaped optical signal.

[0094] For example, the tunable phase shifter can be an electro-optic phase shifter or a thermo-optic phase shifter, etc. The tunable phase shifter can adjust the preset phase shift value by changing the refractive index of the tunable phase shifter through the electro-optic effect or the thermo-optic effect. Considering the periodicity of the trigonometric function cos, the preset phase shift value of the adjustable phase shifter can be in the range of [-π, π]. When the preset phase shift value of the adjustable phase shifter is in the range of [-π, 0], it is equivalent to the adjustable phase shifter being placed in the lower arm of the MZI shaping module, and the preset phase shift value of the adjustable phase shifter is [0, π].

[0095] In this embodiment of the invention, the input end of the first directional coupler is connected to an optical fiber or an optical transmitter, and the two output ends of the first directional coupler are respectively connected to the upper arm and the lower arm of the MZI shaping module, for decomposing one input optical signal received from the input end into two optical signals, and transmitting them to the upper arm and the lower arm respectively.

[0096] The two input terminals of the second directional coupler are respectively connected to the upper arm and the lower arm of the MZI shaping module, and the output terminal of the second directional coupler is connected to an optical receiver or optical fiber; it is used to couple the optical signals output from the upper arm and the lower arm of the MZI shaping module to obtain a shaped optical signal, and output it to the optical receiver or optical fiber.

[0097] It should be noted that a directional coupler is a directional beam coupling (distribution) device, which essentially distributes the power of an optical signal according to a certain ratio. The directional coupler includes a through line and a coupling line; the through line and the coupling line are coupled through a certain coupling mechanism, coupling a portion (or all) of the power from the through line to the coupling line, and requiring that the power in the coupling line can only be transmitted to one output port, while the other port has no power output.

[0098] In this embodiment of the invention, the amplitude transmission coefficient ratio of the upper and lower arms of the MZI shaping module is a constant, and the phase difference between the upper and lower arms of the MZI shaping module is linearly related to the power of the input optical signal. Based on the amplitude transmission coefficient ratio and phase difference of the upper and lower arms of the MZI shaping module and the preset shaping conditions of the adjustable all-optical shaper, the parameter information of the MZI shaping module, the first directional coupler, and the second directional coupler in the adjustable all-optical shaper is determined.

[0099] It should be noted that before using the adjustable all-optical shaper to shape the degraded optical signal, the parameters of the adjustable all-optical shaper need to be determined according to the preset shaping conditions, and then the working range of the MZI shaping module in the adjustable all-optical shaper needs to be determined so that the input optical signal and the working range of the MZI shaping module are matched, thereby realizing the shaping of the input optical signal in the optical fiber communication system.

[0100] Optionally, the reshaping differential gain of the adjustable all-optical shaper is:

[0101]

[0102] Wherein, 'a' is the first coefficient, 0 < a < 1; 'y' is the second parameter; b is the second coefficient, b > 0; p in The power of the input optical signal; This represents the linear phase shift difference of the MZI shaping module.

[0103] In this embodiment of the invention, the general formula for the reshaping differential gain of the adjustable all-optical shaper is:

[0104] It should be noted that, in this embodiment of the invention, the re-amplification gain and re-shaping power transfer function of the adjustable all-optical shaper can be determined based on the power transfer function of the adjustable all-optical shaper; wherein, the power transfer function of the adjustable all-optical shaper is the product of the re-amplification gain and the re-shaping power transfer function of the adjustable all-optical shaper. The re-shaping differential gain of the adjustable all-optical shaper is determined based on the re-shaping power transfer function of the adjustable all-optical shaper.

[0105] Optionally, the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber have the following relationship:

[0106]

[0107] Wherein, R1 is the amplitude transmission coefficient of the nonlinear optical fiber in the upper arm of the MZI shaping module; R2 is the amplitude transmission coefficient of the linear optical fiber in the lower arm of the MZI shaping module; k is a third coefficient, and... ρ1 is the pass-through efficiency of the first directional coupler, and ρ2 is the pass-through efficiency of the second directional coupler.

[0108] The phase shift difference of the MZI shaping module has the following relationship with the power of the input optical signal:

[0109]

[0110] Among them, the The phase shift difference of the MZI shaping module; The phase shift corresponding to the upper arm of the MZI shaping module; The phase shift corresponding to the lower arm of the MZI shaping module; The nonlinear phase shift difference generated by the MZI shaping module, The This represents the linear phase shift difference of the MZI shaping module.

[0111] In this embodiment of the invention, the adjustable all-optical shaper performs nonlinear phase shift and preset phase shift on the input optical signal through the upper arm of the MZI shaping module, and performs linear phase shift on the input optical signal through the lower arm; thereby obtaining the shaped optical signal based on the optical signals output by the upper and lower arms.

[0112] It should be noted that the optical signals output by the upper arm and the lower arm need to meet predetermined conditions in order to be coupled by the second directional coupler so that the two optical signals interfere and obtain the shaped optical signal.

[0113] In order to achieve the re-amplification and reshaping of the adjustable all-optical shaper, the upper and lower arms of the MZI shaping module satisfy the following: the amplitude transmission coefficient ratio of the upper and lower arms of the MZI shaping module is a constant value, and the phase shift difference between the upper and lower arms of the MZI shaping module is linearly related to the power of the input optical signal.

[0114] In some embodiments, for ease of analysis, the second phase shift corresponding to the lower arm is set... Then the The preset phase shift value generated by the adjustable phase shifter.

[0115] The following embodiments of the present invention provide a method for determining the parameters of an adjustable all-optical shaper, such as... Figure 2 As shown, Figure 2This is a flowchart illustrating a method for determining parameters of an adjustable all-optical shaper according to an embodiment of the present invention. The adjustable all-optical shaper is one or more of the adjustable all-optical shapers provided by the above-described schemes, and the method includes:

[0116] Step 201: Determine the reference optical signal according to the preset shaping conditions of the adjustable all-optical shaper;

[0117] Step 202: Determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions based on the reference optical signal and the input optical signal.

[0118] Step 203: Determine the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper.

[0119] Step 204: Determine the parameters of the first directional coupler and the second directional coupler of the adjustable all-optical shaper based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms;

[0120] Step 205: Determine the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal based on the input optical signal, the reference optical signal, and the second coefficient.

[0121] In this embodiment of the invention, the adjustable all-optical shaper adjusts the preset phase shift value of the adjustable optical phase shifter, enabling the adjustable all-optical shaper to shape input optical signals within the shapeable range. That is, input optical signals of different powers within the shapeable range correspond to different preset phase shift values.

[0122] For ease of analysis, a reference power point can be determined based on the preset shaping conditions of the adjustable all-optical shaper; and based on the relative relationship between the reference optical signal corresponding to the reference power point and the input optical signal, different preset phase shift values ​​corresponding to input optical signals of different powers can be determined.

[0123] In step 201, a reference power point can be arbitrarily selected within the shaping range defined by the preset shaping conditions of the adjustable all-optical shaper, and the reference optical signal corresponding to the reference power point can be determined.

[0124] The preset shaping conditions can be the shaping performance conditions of the adjustable all-optical shaper, which can be set according to actual needs. For example, for an input optical signal of PAM4, the shaping range defined by the preset shaping conditions of the adjustable all-optical shaper, that is, the power level range of the PAM4 signal, are [0.9, 1.2] W, [1.2, 1.5] W, [1.5, 1.8] W, and [1.8, 2.1] W, respectively; and the jitter suppression ratio corresponding to each level within the power level range of the PAM4 signal is set to be greater than 2 dB.

[0125] For example, taking the input optical signal as a PAM4 signal, the power level ranges corresponding to the PAM4 signal are [0.9, 1.2] W, [1.2, 1.5] W, [1.5, 1.8] W and [1.8, 2.1] W respectively; the power levels corresponding to the selected reference optical signal are 1.05 W, 1.35 W, 1.65 W and 1.95 W.

[0126] In step 202, the reshaping differential gain is used to indicate the reshaping performance of the all-optical shaper;

[0127] For example, based on the general formula for the reshaping differential gain of the adjustable all-optical shaper and the jitter suppression ratio corresponding to the adjustable all-optical shaper, the reshaping differential gain that satisfies the preset shaping conditions of the adjustable all-optical shaper is determined.

[0128] In step 203, the upper arm of the MZI shaping module includes: a nonlinear optical fiber and a tunable optical phase shifter; the nonlinear optical fiber is used to perform a nonlinear phase shift on the optical signal input to the upper arm; the tunable optical phase shifter is used to perform a preset phase shift on the nonlinearly phase-shifted optical signal. The lower arm of the MZI shaping module includes: a linear optical fiber; the linear optical fiber is used to perform a linear phase shift on the optical signal input to the lower arm.

[0129] It should be noted that, in the tunable all-optical shaper, the amplitude transmission coefficient ratio of the nonlinear fiber and the linear fiber in the MZI shaping module is a constant; and the transmission coefficient ratio of the nonlinear fiber and the linear fiber is related to the reshaping differential gain of the tunable all-optical shaper. Therefore, after determining the reshaping differential gain of the MZI shaping module, the amplitude transmission coefficients of the nonlinear fiber and the linear fiber are determined based on the reshaping differential gain and the amplitude transmission coefficient ratio of the nonlinear fiber and the linear fiber; on this basis, the lengths of the nonlinear fiber and the linear fiber are further determined by combining the attenuation coefficients of the nonlinear fiber and the linear fiber.

[0130] In step 204, the parameters of the first directional coupler and the second directional coupler of the adjustable all-optical shaper are determined based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms.

[0131] Since the nonlinear phase shift generated by the upper arm of the MZI shaping module is the nonlinear phase shift difference of the MZI shaping module, the pass-through efficiency of the first directional coupler is determined based on the nonlinear phase shift generated by the upper arm of the MZI shaping module and the amplitude transmission coefficient and attenuation coefficient of the nonlinear optical fiber in the upper arm.

[0132] The third coefficient is related to the first directional coupler and the second directional coupler; the pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler.

[0133] In step 205, based on the relative relationship between the reference optical signal corresponding to the reference power point and the input optical signal, different preset phase shift values ​​are determined for input optical signals with different powers within the shapeable range.

[0134] In some embodiments, the relative relationship between the reference optical signal and the input optical signal includes the range of movement between the reference power point corresponding to the reference optical signal and the operating point corresponding to the input optical signal.

[0135] Optionally, determining the reshaping differential gain of the adjustable all-optical shaper that satisfies preset shaping conditions based on the reference optical signal and the input optical signal includes:

[0136] Based on the reference optical signal and the input optical signal, determine the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal;

[0137] Based on the first coefficient, the second coefficient, and the preset phase shift value, the first reshaping differential gain corresponding to the input optical signal is determined;

[0138] Based on the first reshaping differential gain, the first jitter suppression ratio corresponding to the adjustable all-optical shaper is determined; wherein, the first jitter suppression ratio is: r1 = -10log 10 |g1|; r1 is the first jitter suppression ratio; g1 is the first reshaping differential gain;

[0139] If the first jitter suppression ratio satisfies the preset shaping condition, the first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping condition.

[0140] Optionally, determining the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal based on the reference optical signal and the input optical signal includes:

[0141] Determine the first coefficient and the second reshaping differential gain corresponding to the first coefficient;

[0142] Based on the second reshaping differential gain, the second jitter suppression ratio corresponding to the reference optical signal is determined; wherein, the second jitter suppression ratio is: r2 = -10log 10 |g2|; r2 is the second jitter suppression ratio; g2 is the second reshaping differential gain;

[0143] If the second jitter suppression ratio meets the preset shaping condition, the second coefficient is determined;

[0144] Based on the reference optical signal, the input optical signal, and the second coefficient, a preset phase shift value for the tunable optical phase shifter corresponding to the input optical signal is determined.

[0145] In this embodiment of the invention, the value range of the first coefficient is: 0 < a < 1; the first coefficient is related to the level of the input optical signal;

[0146] The first coefficient can be arbitrarily selected, and the second reshaping differential gain corresponding to the first coefficient can be determined according to the general formula of the reshaping differential gain of the all-optical shaper.

[0147] In some embodiments, the first coefficient may be determined based on the level of the input optical signal;

[0148] For example, if the input optical signal is a PAM4 signal, i.e., the level is 4, the first coefficient is determined to be a1; if the input optical signal is a PAM16 signal, i.e., the level is 16, the first coefficient is determined to be a2; wherein, a2 <a1。

[0149] The second jitter suppression ratio is used to indicate the amplitude jitter of the output optical signal and the reference optical signal in the adjustable all-optical shaper; based on the amplitude jitter, the shaping effect of the adjustable all-optical shaper on the reference optical signal is determined. The higher the jitter suppression ratio of the adjustable all-optical shaper, the better the shaping performance of the adjustable all-optical shaper on the reference optical signal.

[0150] In this embodiment of the invention, the second jitter suppression ratio of the adjustable all-optical shaper is determined based on the second reshaping differential gain; and based on the second jitter suppression ratio of the adjustable all-optical shaper and the preset shaping conditions of the adjustable all-optical shaper, it is determined whether the first coefficient needs to be adjusted.

[0151] If the second jitter suppression ratio of the adjustable all-light shaper satisfies the preset shaping conditions of the adjustable all-light shaper, a second coefficient that satisfies the preset shaping conditions is determined.

[0152] In this embodiment of the invention, based on the relative relationship between the reference optical signal corresponding to the reference power point and the input optical signal, different preset phase shift values ​​are determined for input optical signals with different powers within the shapeable range.

[0153] Optionally, the second reshaping differential gain satisfies:

[0154] g2 = 1 + acosx - axsinx;

[0155] Wherein, g2 is the second reshaping differential gain; a is the first coefficient; and x is the first parameter corresponding to the reference optical signal, x = bp′ in The p′ in The power of the reference optical signal is denoted as .

[0156] In this embodiment of the invention, for ease of analysis, after determining the reference power point, the reference optical signal corresponding to the reference power point is used as the input optical signal of the adjustable all-optical shaper; the reference optical signal is shaped by the adjustable all-optical shaper so that the jitter suppression ratio corresponding to the reference optical signal meets the preset shaping condition. Since the power of the reference optical signal is determined, the adjustable all-optical shaper is equivalent to an all-optical shaper; therefore, the second reshaping differential gain corresponding to the reference optical signal satisfies: g2=1+ac o sx-axs i.

[0157] Based on the reference optical signal, determine the first and second coefficients of the second reshaping differential gain that satisfy the preset shaping conditions.

[0158] Optionally, determining the second coefficient if the second jitter suppression ratio satisfies the preset shaping condition includes:

[0159] If the second jitter suppression ratio meets the preset shaping condition, a first parameter that meets the preset shaping condition is determined based on the second jitter suppression ratio;

[0160] The second coefficient is determined based on the first parameter;

[0161] Wherein, the second coefficient satisfies: b = x / p′ in b is the second coefficient; x is the first parameter corresponding to the reference optical signal; p′ in The power of the reference optical signal is denoted as .

[0162] In this embodiment of the invention, if the second jitter suppression ratio meets the preset shaping condition, it is determined that the adjustable all-optical shaper can shape the reference optical signal. Based on the second jitter suppression ratio, the first parameter corresponding to the reference optical signal is determined. Based on the power of the reference optical signal and the first parameter, the second coefficient is determined.

[0163] It should be noted that the MZI shaping module in this embodiment of the invention can be used to reshape and re-amplify the input optical signal; the reshaping differential gain of the adjustable all-optical shaper is related to the first parameter x (i.e., bp). in Related to this; based on the reshaping performance requirements of the adjustable all-optical shaper and the reshaping differential gain of the adjustable all-optical shaper, the first parameter is determined; keeping the first parameter unchanged, the reshaping input power p of the adjustable all-optical shaper can be adjusted by changing the value of the second coefficient b. in (That is, adjusting the working range of the adjustable full-light shaping device).

[0164] For example, taking a PAM4 signal as the input optical signal, the power level range of the PAM4 signal is [0.9, 1.2] W, [1.2, 1.5] W, [1.5, 1.8] W, and [1.8, 2.1] W, respectively; the power levels of the selected reference optical signals are 1.05 W, 1.35 W, 1.65 W, and 1.95 W, respectively; based on the jitter suppression ratio corresponding to the PAM4 signal, it is determined that the jitter suppression ratio meets the preset shaping conditions, and the first parameter x that meets the preset shaping conditions is 21, 27, 33, and 39. Then the second coefficient b = x / p′ in =20.

[0165] Optionally, determining the preset phase shift value corresponding to the input optical signal includes:

[0166] The power difference is determined based on the reference optical signal and the input optical signal;

[0167] The linear phase shift difference of the MZI shaping module is determined based on the power difference and the second coefficient.

[0168] The preset phase shift value of the adjustable optical phase shifter is determined based on the linear phase shift difference and the second phase shift corresponding to the lower arm;

[0169] Wherein, the linear phase shift difference satisfies: The The linear phase shift difference; the Δp in The power difference, Δp in =p in -p′ in .

[0170] In this embodiment of the invention, by changing the preset phase shift value of the adjustable optical phase shifter, input optical signals of different powers within the shaping range of the adjustable all-optical shaper can be shaped by the adjustable all-optical shaper.

[0171] Based on the power change (i.e., power difference) between the input optical signal and the reference optical signal, and the second coefficient, the linear phase shift difference of the MZI shaping module is determined. Since the linear phase shift difference of the MZI shaping module is the phase shift difference between the preset phase shift value corresponding to the adjustable optical phase shifter and the second phase shift corresponding to the lower arm, the preset phase shift value of the adjustable optical phase shifter is determined based on the linear phase shift difference of the MZI shaping module and the second phase shift.

[0172] In some embodiments, for ease of analysis, the second phase shift corresponding to the lower arm is set... Then the The preset phase shift value generated by the adjustable phase shifter.

[0173] It should be noted that the preset phase shift value corresponding to the adjustable optical phase shifter can be determined based on the power difference between the reference optical signal and the input optical signal. Here, the reference power point is usually selected within the shaping range corresponding to the preset shaping conditions; however, in actual implementation, the reference power point can also be selected outside the shaping range corresponding to the preset shaping conditions, as long as the range of the preset phase shift value corresponding to the input optical signal within the shaping range corresponding to the preset shaping conditions, determined based on the reference optical signal corresponding to the reference power point, satisfies [-π, π].

[0174] For example, taking the input optical signal as a PAM4 signal, the power level ranges corresponding to the PAM4 signal are [0.9, 1.2] W, [1.2, 1.5] W, [1.5, 1.8] W and [1.8, 2.1] W respectively; the power levels corresponding to the selected reference optical signal are 0.895 W, 1.195 W, 1.495 W and 1.795 W.

[0175] Optionally, the method further includes:

[0176] If the first jitter suppression ratio does not meet the preset shaping condition, the first reshaping differential gain is parameter-corrected.

[0177] The corrected first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions.

[0178] In this embodiment of the invention, if the jitter suppression ratio does not meet the preset shaping condition, the first coefficient in the first reshaping differential gain is adjusted, and it is determined whether the first reshaping differential gain corresponding to the adjusted first coefficient meets the preset shaping condition based on the adjusted first coefficient; until the first reshaping differential gain corresponding to the adjusted first coefficient meets the preset shaping condition, the first reshaping differential gain corresponding to the adjusted first coefficient is determined as the reshaping differential gain of the adjustable all-optical shaper that meets the preset shaping condition; and a second coefficient is determined based on the reshaping differential gain.

[0179] In some embodiments, if the jitter suppression ratio does not meet the preset shaping condition, the first coefficient in the first reshaping differential gain is reduced by a preset decrease amount;

[0180] In this embodiment of the invention, the preset decrease amount can be set according to user needs; for example, the preset decrease amount is 0.1 or 0.01, etc.

[0181] In other embodiments, if the jitter suppression ratio does not meet the preset shaping condition, the difference between the jitter suppression ratio and the preset shaping condition is determined;

[0182] If the difference between the jitter suppression ratio and the preset shaping condition is greater than a first threshold, the first coefficient in the first reshaping differential gain is reduced by a first preset decrease amount.

[0183] If the difference between the jitter suppression ratio and the preset shaping condition is less than or equal to the first threshold, the first coefficient in the first reshaping differential gain is reduced by a second preset reduction amount; wherein the second preset reduction amount is less than the first preset reduction amount.

[0184] In this embodiment of the invention, the first threshold can be set according to user needs. By comparing the difference between the jitter suppression ratio and the preset shaping condition with the first threshold, the adjustment amount of the first coefficient is determined to improve the adjustment efficiency and accuracy of the first coefficient.

[0185] For example, if the jitter suppression ratio corresponding to the first reshaping differential gain is -3dB, and the preset shaping condition is that the jitter suppression ratio is not less than 2dB, then the difference between the jitter suppression ratio and the preset shaping condition is 5dB; compare the difference between the jitter suppression ratio and the preset shaping condition with the first threshold (e.g., 3dB) to determine that the difference between the jitter suppression ratio and the preset shaping condition is greater than the first threshold; reduce the first coefficient in the first reshaping differential gain by a first preset decrease amount (e.g., 0.1);

[0186] If the jitter suppression ratio of the first reshaping differential gain corresponding to the adjusted first coefficient is 0dB, then the difference between the jitter suppression ratio and the preset shaping condition is 2dB, which is less than the first threshold. The first coefficient is then reduced by a second preset decrease amount (e.g., 0.05) until the first reshaping differential gain corresponding to the first coefficient satisfies the preset shaping condition.

[0187] Optionally, the parameters of the upper and lower arms of the MZI shaping module include: amplitude transmission coefficient;

[0188] The step of determining the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper includes:

[0189] Based on the first coefficient, a third coefficient that satisfies the amplitude transmission coefficient constraint condition is determined, as well as the amplitude transmission coefficient of the nonlinear fiber in the upper arm and the amplitude transmission coefficient of the linear fiber in the lower arm.

[0190] The constraint condition for the amplitude transmission coefficient is as follows:

[0191]

[0192] Wherein, R1 is the amplitude transmission coefficient of the nonlinear optical fiber; R2 is the amplitude transmission coefficient of the linear optical fiber; k is the third coefficient; and a is the first coefficient.

[0193] In this embodiment of the invention, since the amplitude transmission coefficient ratio of the upper and lower arms of the MZI shaping module in the adjustable all-optical shaper is a constant value, and satisfies: The amplitude transmission coefficient constraint is determined based on the first coefficient of the reshaping differential gain and the amplitude transmission coefficient ratio of the upper arm and the lower arm; and the third coefficient that satisfies the amplitude transmission coefficient constraint and the amplitude transmission coefficient ratio of the MZI shaping module are determined; the amplitude transmission coefficient of the upper arm and the amplitude transmission coefficient of the lower arm are determined based on the amplitude transmission coefficient ratio.

[0194] It should be noted that, for ease of analysis, the insertion loss of the adjustable phase shifter is ignored in the embodiments of the present invention.

[0195] For example, the reshaping differential gain is: g = 1 + 0.035cosy - 0.035ysiny + 0.105siny, where x = 20p in For example, based on the reshaping differential gain, the first coefficient a = 0.035, the second coefficient b = 20, and the preset phase shift value are determined. Based on the first coefficient and the amplitude transmission coefficient ratio, the amplitude transmission coefficient constraint condition is determined as follows: The formula uses the "+" sign; arbitrarily select the third coefficient k = 0.0141 to determine the amplitude transmission coefficient ratio that satisfies the amplitude transmission coefficient constraint condition. The amplitude transmission coefficient R2 of the lower arm is selected to be 1, and the amplitude transmission coefficient R1 of the upper arm is determined to be 0.804.

[0196] Optionally, the parameters of the upper and lower arms of the MZI shaping module include: length;

[0197] The step of determining the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper further includes:

[0198] Based on the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber, the lengths of the nonlinear optical fiber and the linear optical fiber that satisfy the length constraint condition are determined.

[0199] The length constraint condition is as follows:

[0200]

[0201] Wherein, L1 is the length of the nonlinear optical fiber; α1 is the attenuation coefficient of the nonlinear optical fiber;

[0202]

[0203] Wherein, L2 is the length of the linear optical fiber; and α2 is the attenuation coefficient of the linear optical fiber.

[0204] In this embodiment of the invention, the length of the nonlinear optical fiber in the MZI shaping module that satisfies the length constraint condition is determined based on the amplitude transmission coefficient and attenuation coefficient of the nonlinear optical fiber; the length of the linear optical fiber in the MZI shaping module that satisfies the length constraint condition is determined based on the amplitude transmission coefficient and attenuation coefficient of the linear optical fiber.

[0205] For example, the amplitude transmission coefficient R1 of the upper arm nonlinear fiber of the MZI shaping module is 0.804, and the attenuation coefficient α1 is 0.21km. -1 For example, the length of the nonlinear optical fiber is determined.

[0206] The amplitude transmission coefficient R2 = 1 and the attenuation coefficient α2 = 0.15km of the linear fiber in the lower arm of the MZI shaping module are given. -1 For example, determine the length of the linear optical fiber.

[0207] Optionally, determining the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient, the third coefficient, and the parameters of the upper and lower arms in the reshaping differential gain of the adjustable all-optical shaper includes:

[0208] The pass-through efficiency of the first directional coupler is determined based on the second coefficient and the amplitude transmission coefficient of the nonlinear optical fiber.

[0209] The pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler.

[0210] The second coefficient, the amplitude transmission coefficient of the nonlinear optical fiber, and the through-pass efficiency of the first directional coupler have the following relationship:

[0211] γρ1(1-R1 2 )=bα1;

[0212] γ is the nonlinear coefficient of the nonlinear optical fiber; ρ1 is the pass-through efficiency of the first directional coupler.

[0213] In this embodiment of the invention, since the nonlinear phase shift difference between the upper and lower arms in the MZI shaping module is equal to the nonlinear phase shift corresponding to the upper arm, that is... Then the second coefficient, the amplitude transmission coefficient of the nonlinear optical fiber, and the straight-through efficiency of the first directional coupler satisfy: γρ1(1-R1) 2 )=bα1;

[0214] The pass-through efficiency of the first directional coupler is determined based on the second coefficient, the amplitude transmission coefficient, the attenuation coefficient, and the nonlinear coefficient of the nonlinear optical fiber. The pass-through efficiency of the second directional coupler is determined based on the pass-through efficiency of the first directional coupler and the third coefficient.

[0215] In some embodiments, the third coefficient, the pass-through efficiency of the first directional coupler, and the pass-through efficiency of the second directional coupler have the following relationship:

[0216]

[0217] Wherein, ρ1 is the pass-through efficiency of the first directional coupler, and ρ2 is the pass-through efficiency of the second directional coupler.

[0218] In this embodiment of the invention, after determining the pass-through efficiency of the first directional coupler, the pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler.

[0219] For example, with the second coefficient b = 20, the third coefficient k = 0.0141, the amplitude transmission coefficient R1 of the nonlinear optical fiber = 0.804, and the attenuation coefficient α1 = 0.21km... -1 and nonlinear coefficient γ = 12W -1 Taking / km as an example, determine the through efficiency of the first directional coupler. Based on the first directional coupler's pass-through efficiency ρ1 = 0.99 and the third coefficient k = 0.0141, the second directional coupler's pass-through efficiency ρ2 = 0.0193 is determined.

[0220] Based on the above embodiments of the present invention, exemplary applications of the embodiments of the present invention in practical application scenarios will be described below.

[0221] This invention provides a method for determining the parameters of an adjustable all-light shaper, wherein the adjustable all-light shaper is as follows: Figure 1 As shown, the method includes:

[0222] Step 401: Determine the reference optical signal according to the preset shaping conditions of the adjustable all-optical shaper;

[0223] For example, the input optical signal of the adjustable all-optical shaper is a PAM4 signal, with corresponding power level ranges of [0.9, 1.2] W, [1.2, 1.5] W, [1.5, 1.8] W, and [1.8, 2.1] W, respectively. The power interval between adjacent power levels is 0.3 W, and the selected reference optical signal levels are 1.05 W, 1.35 W, 1.65 W, and 1.95 W. Furthermore, there is amplitude jitter σ at each amplitude level. in =0.01 Gaussian noise;

[0224] Step 402: Determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions based on the reference optical signal and the input optical signal.

[0225] For example, the preset shaping condition of the adjustable all-optical shaper is that the jitter suppression ratio at each level is greater than 2dB.

[0226] According to the preset shaping conditions and the reshaping differential gain corresponding to the reference optical signal, g = 1 + acosx - axsinx, where x = bp in The first coefficient a and the second coefficient b are determined.

[0227] First, select the first coefficient a = 0.035, and determine the reshaping differential gain g = 1 + 0.035cosx - 0.035xsinx corresponding to the reference optical signal; For example... Figure 3 As shown, Figure 3This is a reshaping differential gain curve provided in an embodiment of the present invention. Based on the reshaping differential gain, the target level values ​​of the reference optical signal corresponding to the jitter suppression ratio being greater than 2dB are determined as: 21, 27, 33, and 39. Based on the target level values ​​of the reference optical signal and the power level of the reference optical signal, the second coefficient b = x / p is determined. in =20.

[0228] Based on the relationship between the reference optical signal, the input optical signal, and the preset phase shift value of the adjustable optical phase shifter Based on the reference optical signal levels of 1.05W, 1.35W, 1.65W, and 1.95W, and the corresponding power level ranges of the adjustable all-optical shaper ([0.9, 1.2]W, [1.2, 1.5]W, [1.5, 1.8]W, and [1.8, 2.1]W), the linear phase shift value corresponding to the input optical signal is determined. The linear phase shift value Substituting the reshaping differential gain formula into the MZI shaping module of the adjustable all-optical shaper In this process, the reshaping differential gain is determined.

[0229] Based on the reshaping differential gain, determine whether the jitter suppression ratio corresponding to the input optical signal meets the preset shaping conditions. If the jitter suppression ratio meets the preset shaping conditions, determine the reshaping differential gain as the reshaping differential gain of the adjustable all-optical shaper. If the jitter suppression ratio does not meet the preset shaping conditions, reselect the first coefficient and the second coefficient.

[0230] Step 403: Determine the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper.

[0231] For example, the first coefficient a = 0.035 is substituted into the formula for the amplitude transmission coefficient ratio of the upper arm and lower arm in the MZI shaping module. In the formula, taking the "+" sign and selecting k = 0.0141, the amplitude transmission coefficient ratio of the upper arm and the lower arm is... The amplitude transmission coefficient R2 of the lower arm is selected to be 1, and the amplitude transmission coefficient R1 of the upper arm is determined to be 0.804. Based on the amplitude transmission coefficient R1 = 0.804 and attenuation coefficient α1 = 0.21 km of the upper arm nonlinear fiber... -1 Determine the length of the nonlinear optical fiber. Based on the amplitude transmission coefficient R2 = 1 and attenuation coefficient α2 = 0.15km of the lower arm linear optical fiber. -1 Determine the length of the linear optical fiber.

[0232] Step 404: Determine the parameters of the first directional coupler and the second directional coupler of the adjustable all-optical shaper based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms;

[0233] For example, based on the second coefficient b = 20, the third coefficient k = 0.0141, the amplitude transmission coefficient R1 of the nonlinear optical fiber = 0.804, and the attenuation coefficient α1 = 0.21km... -1 and nonlinear coefficient γ = 12W -1 / km, determine the through efficiency of the first directional coupler Based on the first directional coupler's pass-through efficiency ρ1 = 0.99 and the third coefficient k = 0.0141, the second directional coupler's pass-through efficiency ρ2 = 0.0193 is determined.

[0234] Step 405: Determine the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal based on the input optical signal, the reference optical signal, and the second coefficient.

[0235] For example, the power difference between the input optical signal and the parameter optical signal and the second coefficient are substituted into the preset phase shift value formula. In this process, the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signals of different power is determined. Thus, by changing the preset phase shift value of the adjustable optical phase shifter, a jitter suppression ratio of more than 2dB can be achieved within the shaping range [0.9, 2.1]W by the adjustable all-optical shaper.

[0236] The following embodiments of the present invention provide a parameter determination device for an adjustable all-light shaper, such as... Figure 4 As shown, Figure 4 This is a schematic diagram of a device for determining the performance parameters of a regenerator according to an embodiment of the present invention. The device includes:

[0237] The gain determination module is used to determine a reference optical signal based on the shapeability range of the adjustable all-optical shaper; and to determine the reshaping differential gain of the adjustable all-optical shaper that meets preset shaping conditions based on the reference optical signal and the input optical signal.

[0238] The parameter determination module is used to determine the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; to determine the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; and to determine the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal based on the input optical signal, the reference optical signal, and the second coefficient.

[0239] Optionally, the gain determination module is used to:

[0240] Based on the reference optical signal and the input optical signal, determine the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal;

[0241] Based on the first coefficient, the second coefficient, and the preset phase shift value, the first reshaping differential gain corresponding to the input optical signal is determined;

[0242] Based on the first reshaping differential gain, the first jitter suppression ratio corresponding to the adjustable all-optical shaper is determined; wherein, the first jitter suppression ratio is: r1 = -10log 10 |g1|; r1 is the first jitter suppression ratio; g1 is the first reshaping differential gain;

[0243] If the first jitter suppression ratio satisfies the preset shaping condition, the first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping condition.

[0244] Optionally, the gain determination module is specifically used for:

[0245] Determine the first coefficient and the second reshaping differential gain corresponding to the first coefficient;

[0246] Based on the second reshaping differential gain, the second jitter suppression ratio corresponding to the reference optical signal is determined; wherein, the second jitter suppression ratio is: r2 = -10log 10 |g2|; r2 is the second jitter suppression ratio; g2 is the second reshaping differential gain;

[0247] If the second jitter suppression ratio meets the preset shaping condition, the second coefficient is determined;

[0248] Based on the reference optical signal, the input optical signal, and the second coefficient, a preset phase shift value for the tunable optical phase shifter corresponding to the input optical signal is determined.

[0249] Optionally, the second reshaping differential gain satisfies:

[0250] g2 = 1 + acosx - axsinx;

[0251] Wherein, g2 is the second reshaping differential gain; a is the first coefficient; and x is the target power of the reference optical signal, x = bp′. in The p′ in The power of the reference optical signal is denoted as .

[0252] Optionally, the gain determination module is specifically used for:

[0253] If the second jitter suppression ratio meets the preset shaping condition, the target power of the reference optical signal is determined based on the second jitter suppression ratio;

[0254] The second coefficient is determined based on the target power of the reference optical signal;

[0255] Wherein, the second coefficient satisfies: b = x / p′ in b is the second coefficient; x is the target power of the reference optical signal; p′ in The power of the reference optical signal is denoted as .

[0256] Optionally, the gain determination module is specifically used for:

[0257] The power difference is determined based on the reference optical signal and the input optical signal;

[0258] The linear phase shift difference of the MZI shaping module is determined based on the power difference and the second coefficient.

[0259] The preset phase shift value of the adjustable optical phase shifter is determined based on the linear phase shift difference and the second phase shift corresponding to the lower arm;

[0260] Wherein, the linear phase shift value satisfies: The The linear phase shift value; the Δp in The power difference, Δp in =p in -p′ in .

[0261] Optionally, the gain determination module is further configured to:

[0262] If the first jitter suppression ratio does not meet the preset shaping condition, the first reshaping differential gain is parameter-corrected.

[0263] The corrected first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions.

[0264] Optionally, the parameters of the upper and lower arms of the MZI shaping module include: amplitude transmission coefficient;

[0265] The parameter determination module is used for:

[0266] Based on the first coefficient, a third coefficient that satisfies the amplitude transmission coefficient constraint condition is determined, as well as the amplitude transmission coefficient of the nonlinear fiber in the upper arm and the amplitude transmission coefficient of the linear fiber in the lower arm.

[0267] The constraint condition for the amplitude transmission coefficient is as follows:

[0268]

[0269] Wherein, R1 is the amplitude transmission coefficient of the nonlinear optical fiber; R2 is the amplitude transmission coefficient of the linear optical fiber; k is the third coefficient; and a is the first coefficient.

[0270] Optionally, the parameters of the upper and lower arms of the MZI shaping module include: length;

[0271] The parameter determination module is used for:

[0272] Based on the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber, the lengths of the nonlinear optical fiber and the linear optical fiber that satisfy the length constraint condition are determined.

[0273] The length constraint condition is as follows:

[0274]

[0275] Wherein, L1 is the length of the nonlinear optical fiber; α1 is the attenuation coefficient of the nonlinear optical fiber;

[0276]

[0277] Wherein, L2 is the length of the linear optical fiber; and α2 is the attenuation coefficient of the linear optical fiber.

[0278] Optionally, the parameter determination module is used to:

[0279] The pass-through efficiency of the first directional coupler is determined based on the second coefficient and the amplitude transmission coefficient of the nonlinear optical fiber.

[0280] The pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler.

[0281] The second coefficient, the amplitude transmission coefficient of the nonlinear optical fiber, and the through-pass efficiency of the first directional coupler have the following relationship:

[0282] γρ1(1-R1 2 )=bα1;

[0283] γ is the nonlinear coefficient of the nonlinear optical fiber; ρ1 is the pass-through efficiency of the first directional coupler.

[0284] Optionally, the third coefficient, the pass-through efficiency of the first directional coupler, and the pass-through efficiency of the second directional coupler have the following relationship:

[0285]

[0286] Wherein, ρ1 is the pass-through efficiency of the first directional coupler, and ρ2 is the pass-through efficiency of the second directional coupler.

[0287] This invention also provides an electronic device, the electronic device comprising:

[0288] Memory, used to store executable instructions;

[0289] The processor, when executing executable instructions stored in the memory, implements the parameter determination method for the adjustable all-light shaper as provided by one or more of the aforementioned technical solutions.

[0290] The memory may include various types of storage media for data storage. In this embodiment, the storage media included in the memory are at least partially non-volatile storage media, which can be used to store the computer program.

[0291] The processor may include: a central processing unit, a microprocessor, a digital signal processor, an application processor, an application-specific integrated circuit, or a programmable array, etc., and can be used for parameter determination methods of the adjustable all-optical shaper provided by one or more of the aforementioned technical solutions through a computer program.

[0292] In this embodiment, the processor can be connected to the memory via an internal device bus such as an integrated circuit bus.

[0293] This invention also provides a computer storage medium storing a computer program. When the computer program is executed by a processor, it performs the parameter determination method for the adjustable all-optical shaper provided by one or more of the aforementioned technical solutions.

[0294] The computer storage medium provided in this embodiment of the invention includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. Optionally, the computer storage medium may be a non-transient storage medium. Here, non-transient storage medium can also be referred to as non-volatile storage medium.

[0295] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the present invention are included within the scope of protection of the present invention.

Claims

1. An adjustable all-optical shaper, characterized by include: The MZI shaping module comprises an upper arm and a lower arm arranged parallel to the upper arm. The output of the first directional coupler is connected to the input of the MZI shaping module, and is used to decompose the input optical signal into two optical signals, which are respectively input to the upper arm and the lower arm of the MZI shaping module. The upper arm includes: a nonlinear optical fiber and a tunable optical phase shifter connected to the nonlinear optical fiber, used to perform nonlinear phase shift on one of the two optical signals through the nonlinear optical fiber, and to perform a preset phase shift on the nonlinearly phase-shifted optical signal through the tunable optical phase shifter; The lower arm includes a linear optical fiber, used to perform a linear phase shift on one of the two optical signals through the linear optical fiber; The input end of the second directional coupler is connected to the upper arm and the lower arm of the MZI shaping module to couple the two optical signals output by the upper arm and the lower arm to obtain the shaped optical signal.

2. The adjustable all-optical shaper according to claim 1, characterized in that, The reshaping differential gain of the adjustable all-optical shaper is: ； Among them, the a As the first coefficient, The y The second parameter; The b As the second coefficient, The The power of the input optical signal; This represents the linear phase shift difference of the MZI shaping module.

3. The shaping device according to claim 2, characterized in that, The amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber have the following relationship: ； Among them, the The amplitude transmission coefficient of the nonlinear optical fiber in the upper arm of the MZI shaping module; The amplitude transmission coefficient of the linear optical fiber in the lower arm of the MZI shaping module; k The third coefficient, the The The pass-through efficiency of the first directional coupler, the The through efficiency of the second directional coupler; The phase shift difference of the MZI shaping module has the following relationship with the power of the input optical signal: ； The The phase shift difference of the MZI shaping module; The phase shift corresponding to the upper arm of the MZI shaping module; The phase shift corresponding to the lower arm of the MZI shaping module; The nonlinear phase shift difference generated by the MZI shaping module, The This represents the linear phase shift difference of the MZI shaping module.

4. A method for determining the parameters of an adjustable all-light shaper, characterized in that, The adjustable all-light shaping device is the adjustable all-light shaping device according to claim 3, and the method includes: The reference optical signal is determined based on the preset shaping conditions of the adjustable all-optical shaper; Based on the reference optical signal and the input optical signal, determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions; Based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient and the parameters of the upper and lower arms of the MZI shaping module are determined. Based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms, the parameters of the first and second directional couplers of the adjustable all-optical shaper are determined. Based on the input optical signal, the reference optical signal, and the second coefficient, the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal is determined.

5. The method according to claim 4, characterized in that, The step of determining the reshaping differential gain of the adjustable all-optical shaper that meets preset shaping conditions based on the reference optical signal and the input optical signal includes: Based on the reference optical signal and the input optical signal, determine the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal; Based on the first coefficient, the second coefficient, and the preset phase shift value, the first reshaping differential gain corresponding to the input optical signal is determined; Based on the first reshaping differential gain, the first jitter suppression ratio corresponding to the adjustable all-optical shaper is determined; wherein, the first jitter suppression ratio is: The The first jitter suppression ratio; This is the first reshaping differential gain; If the first jitter suppression ratio satisfies the preset shaping condition, the first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping condition.

6. The method according to claim 5, characterized in that, The step of determining the first coefficient, the second coefficient, and the preset phase shift value corresponding to the input optical signal based on the reference optical signal and the input optical signal includes: Determine the first coefficient and the second reshaping differential gain corresponding to the first coefficient; Based on the second reshaping differential gain, the second jitter suppression ratio corresponding to the reference optical signal is determined; wherein, the second jitter suppression ratio is: The The second jitter suppression ratio; This is the second reshaping differential gain; If the second jitter suppression ratio meets the preset shaping condition, the second coefficient is determined; Based on the reference optical signal, the input optical signal, and the second coefficient, a preset phase shift value for the tunable optical phase shifter corresponding to the input optical signal is determined.

7. The method according to claim 6, characterized in that, The second reshaping differential gain satisfies: ； Among them, the The second reshaping differential gain; a The first coefficient; x The first parameter corresponding to the reference optical signal. The The power of the reference optical signal is denoted as .

8. The method according to claim 6, characterized in that, If the second jitter suppression ratio satisfies the preset shaping condition, determining the second coefficient includes: If the second jitter suppression ratio meets the preset shaping condition, a first parameter that meets the preset shaping condition is determined based on the second jitter suppression ratio; The second coefficient is determined based on the first parameter; Wherein, the second coefficient satisfies: The b The second coefficient; x The first parameter corresponding to the reference optical signal; The power of the reference optical signal is denoted as .

9. The method according to claim 4 or 6, characterized in that, Determining the preset phase shift value corresponding to the input optical signal includes: The power difference is determined based on the reference optical signal and the input optical signal; The linear phase shift difference of the MZI shaping module is determined based on the power difference and the second coefficient. The preset phase shift value of the adjustable optical phase shifter is determined based on the linear phase shift difference and the second phase shift corresponding to the lower arm; Wherein, the linear phase shift difference satisfies: The The linear phase shift difference; The power difference, the .

10. The method according to claim 5, characterized in that, The method further includes: If the first jitter suppression ratio does not meet the preset shaping condition, the first reshaping differential gain is parameter-corrected. The corrected first reshaping differential gain is determined as the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions.

11. The method according to claim 4, characterized in that, The parameters of the upper and lower arms of the MZI shaping module include: amplitude transmission coefficient and length; The step of determining the third coefficient and the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper includes: Based on the first coefficient, a third coefficient that satisfies the amplitude transmission coefficient constraint condition is determined, as well as the amplitude transmission coefficient of the nonlinear fiber in the upper arm and the amplitude transmission coefficient of the linear fiber in the lower arm. Based on the amplitude transmission coefficient of the nonlinear optical fiber and the amplitude transmission coefficient of the linear optical fiber, the lengths of the nonlinear optical fiber and the linear optical fiber that satisfy the length constraint condition are determined. The constraint condition for the amplitude transmission coefficient is as follows: ； The The amplitude transmission coefficient of the nonlinear optical fiber; The amplitude transmission coefficient of the linear optical fiber; k The third coefficient; a The first coefficient; The length constraint condition is: ； The The length of the nonlinear optical fiber; The attenuation coefficient of the nonlinear optical fiber; ； The The length of the linear optical fiber; The attenuation coefficient of the linear optical fiber is denoted as .

12. The method according to claim 11, characterized in that, The step of determining the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient, the third coefficient, and the parameters of the upper and lower arms in the reshaping differential gain of the adjustable all-optical shaper includes: The pass-through efficiency of the first directional coupler is determined based on the second coefficient and the amplitude transmission coefficient of the nonlinear optical fiber. The pass-through efficiency of the second directional coupler is determined based on the third coefficient and the pass-through efficiency of the first directional coupler. The second coefficient, the amplitude transmission coefficient of the nonlinear optical fiber, and the through-through efficiency of the first directional coupler have the following relationship: ； The The nonlinear coefficient of the nonlinear optical fiber; The through-through efficiency of the first directional coupler; The third coefficient, the pass-through efficiency of the first directional coupler, and the pass-through efficiency of the second directional coupler have the following relationship: ； The The pass-through efficiency of the first directional coupler, the The through efficiency of the second directional coupler.

13. A parameter determination device for an adjustable all-light shaper, characterized in that, The adjustable all-light shaping device is the adjustable all-light shaping device according to claim 3, and the device includes: The gain determination module is used to determine a reference optical signal based on the preset shaping conditions of the adjustable all-optical shaper; and to determine the reshaping differential gain of the adjustable all-optical shaper that satisfies the preset shaping conditions based on the reference optical signal and the input optical signal. The parameter determination module is used to determine the parameters of the upper and lower arms of the MZI shaping module based on the first coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; to determine the parameters of the first and second directional couplers of the adjustable all-optical shaper based on the second coefficient in the reshaping differential gain of the adjustable all-optical shaper, the third coefficient, and the parameters of the upper and lower arms; and to determine the preset phase shift value of the adjustable optical phase shifter corresponding to the input optical signal based on the input optical signal, the reference optical signal, and the second coefficient.

14. An electronic device, characterized in that, include: Memory, used to store executable instructions; The processor, when executing executable instructions stored in the memory, implements the parameter determination method for the adjustable all-light shaper as described in any one of claims 4-12.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores executable instructions, which, when executed by a processor, implement the parameter determination method for the adjustable all-light shaper as described in any one of claims 4-12.

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