CN113098611B - Method, device, equipment and storage medium for determining performance parameters of regenerator - Google Patents

Method, device, equipment and storage medium for determining performance parameters of regenerator Download PDF

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CN113098611B
CN113098611B CN202110242103.9A CN202110242103A CN113098611B CN 113098611 B CN113098611 B CN 113098611B CN 202110242103 A CN202110242103 A CN 202110242103A CN 113098611 B CN113098611 B CN 113098611B
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regenerator
reshaping
mzi
transfer function
shaping module
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CN113098611A (en
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孔祥健
凌九红
张博
胡毅
罗勇
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Accelink Technologies Co Ltd
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Accelink Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/299—Signal waveform processing, e.g. reshaping or retiming

Abstract

The embodiment of the invention provides a method, a device, equipment and a storage medium for determining performance parameters of a regenerator. The method comprises the following steps: determining a reshaping power transfer function and a reamplifying gain of a regenerator according to the power transfer function of the regenerator; the re-amplification gain is indicative of a re-amplification performance of the regenerator; determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator, the reshaping differential gain being indicative of a reshaping performance of the regenerator.

Description

Method, device, equipment and storage medium for determining performance parameters of regenerator
Technical Field
The present invention relates to the field of optical fiber communication technologies, and in particular, to a method, an apparatus, a device, and a storage medium for determining a performance parameter of a regenerator.
Background
In an optical fiber communication system, an optical signal is susceptible to factors such as optical fiber dispersion, ASE noise accumulation of an optical amplifier, interaction between channels and the like in the transmission process, so that the optical signal is degraded, the transmission rate and distance of the system and a network are limited finally, and the degraded signal needs to be regenerated in time in order to ensure reliable transmission of information in the network.
In the related art, the regeneration performance of the regenerator is generally evaluated by the power transfer function of the regenerator, but the regeneration performance of the regenerator includes a re-amplification performance and a re-shaping performance. Since the power transfer function of the regenerator also reflects the re-amplification performance of the regenerator, the jitter suppression ratio determined by the power transfer function of the regenerator cannot accurately evaluate the reshaping performance of the regenerator.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a storage medium for determining performance parameters of a regenerator. The technical scheme of the embodiment of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for determining a performance parameter of a regenerator, including:
determining a reshaping power transfer function and a reamplifying gain of a regenerator according to the power transfer function of the regenerator; the re-amplification gain is indicative of a re-amplification performance of the regenerator;
determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator, the reshaping differential gain being indicative of a reshaping performance of the regenerator.
Optionally, the power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain have the following relationships:
Pout＝Gpout；
wherein, the Pout＝F(Pin) Is the power transfer function of the regenerator, PoutTo output power, PinIs the input power; g is the re-amplification gain; said p isout＝f(pin) For the reshaping power transfer function of the regenerator, the poutFor reshaping the output power, pinTo reshape the input power, and pin＝Pin；。
The reshaped differential gain has the following relationship with a reshaped power transfer function of the regenerator and the reshaped input power:
Figure BDA0002962571120000021
wherein g is the reshaped differential gain.
Optionally, the method further comprises:
determining a jitter suppression ratio of the regenerator based on a reshaped differential gain of the regenerator;
determining the power of an input optical signal which can be shaped by the regenerator according to the jitter suppression ratio of the regenerator;
wherein a jitter suppression ratio of the regenerator satisfies: r is-10 log10G |; r is a jitter suppression ratio; g is rearrangementForming a differential gain.
Optionally, the determining the power of the input optical signal that can be shaped by the regenerator according to the jitter suppression ratio of the regenerator includes:
determining the power of the input optical signal which can be shaped by the regenerator according to the jitter suppression ratio corresponding to the input optical signal; wherein the content of the first and second substances,
when r <0, the regenerator is characterized to have no reshaping performance, and the quality of the optical signal output by the regenerator is degraded;
when r is 0, the regenerator is characterized to have no reshaping performance, and the quality of an optical signal output by the regenerator is unchanged;
when r >0, the regenerator is characterized by reshaping performance, and the quality of the optical signal output by the regenerator is improved.
Optionally, the regenerator comprises: a Mach-Zehnder interference (MZI) shaping module, a first directional coupler, and a second directional coupler; wherein the MZI shaping module comprises: an upper arm and a lower arm arranged in parallel with the upper arm;
the output end of the first directional coupler is respectively connected with the input end of the MZI shaping module, and is used for decomposing the input optical signal into two optical signals which are respectively transmitted to the upper arm and the lower arm of the MZI shaping module;
an upper arm of the MZI shaping module, which is used for generating a first phase shift for an optical signal input to the upper arm; a lower arm of the MZI shaping module for a second phase shift of an optical signal input to the lower arm;
and the input end of the second directional coupler is connected with the output end of the MZI shaping module and is used for coupling the optical signals output by the upper arm and the lower arm to obtain the shaped optical signals.
Optionally, the power transfer function P of the regeneratorout＝F(Pin) Comprises the following steps:
Figure BDA0002962571120000031
wherein, the PoutIs the output power of the regenerator; the P isinIs the input power of the regenerator; the rho1Is the through efficiency of the first directional coupler; the rho2Is the shoot-through efficiency of the second directional coupler; the above-mentioned
Figure BDA0002962571120000032
For the phase difference of the upper and lower arms of the MZI shaping module
Figure BDA0002962571120000033
The above-mentioned
Figure BDA0002962571120000034
A first phase shift corresponding to an upper arm of the MZI shaping module; what is needed is
Figure BDA0002962571120000035
A second phase shift corresponding to the lower arm of the MZI shaping module; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2And the amplitude transmission coefficient of the lower arm of the MZI shaping module.
Optionally, the determining a reshaping power transfer function and a reamplifying gain of the regenerator according to the power transfer function of the regenerator comprises:
the re-amplification gain is:
Figure BDA0002962571120000036
reshaping power transfer function p of said regeneratorout＝f(pin) Comprises the following steps:
Figure BDA0002962571120000037
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping an input power for the MZI shaping module; the above-mentioned
Figure BDA0002962571120000041
For a non-linear phase shift difference of said MZI shaping module
Figure BDA0002962571120000042
Is the linear phase shift difference of the MZI shaping module, and
Figure BDA0002962571120000043
optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA0002962571120000044
b is a second coefficient; the linear phase shift difference of the MZI shaping module is as follows:
Figure BDA0002962571120000045
m is an integer;
said determining a reshaped differential gain of said regenerator based on a reshaped power transfer function of said regenerator comprises:
the reshaped differential gain of the regenerator is: g is 1+ a cos x-ax sin x;
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure BDA0002962571120000046
And 0<a<1; x is a first parameter, and x is bpin。
Optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber and a tunable optical phase shifter; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA0002962571120000047
b isA second coefficient; the linear phase shift difference of the MZI shaping module is the difference value of a preset phase shift value generated by the adjustable optical phase shifter and a second phase shift corresponding to the lower arm;
said determining a reshaped differential gain of said regenerator based on a reshaped power transfer function of said regenerator comprises:
the reshaped differential gain of the regenerator is:
Figure BDA0002962571120000048
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure BDA0002962571120000049
And 0<a<1; y is a second parameter, the
Figure BDA00029625711200000410
B is a second coefficient, said
Figure BDA00029625711200000411
Is the linear phase shift difference of the MZI shaping module.
In a second aspect, an embodiment of the present invention provides a performance parameter determining apparatus for a regenerator, including:
an amplification gain determination module for determining a reshaping power transfer function and a re-amplification gain of the regenerator according to the power transfer function of the regenerator;
a shaping gain determination module for determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
a memory for storing executable instructions;
a processor, configured to execute the executable instructions stored in the memory, and implement the method for determining the performance parameter of the regenerator according to one or more of the foregoing technical solutions.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores executable instructions, and when the executable instructions are executed by a processor, the method for determining a performance parameter of a regenerator provided in one or more of the foregoing technical solutions is implemented.
The embodiment of the invention provides a method, a device, equipment and a storage medium for determining performance parameters of a regenerator. Determining a reshaping power transfer function and a reamplifying gain of a regenerator through the power transfer function of the regenerator; determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator; therefore, the re-amplification performance and the re-shaping performance of the regenerator are respectively represented by the re-amplification gain and the re-shaping differential gain, and the re-amplification performance and the re-shaping performance of the regenerator are accurately determined.
Drawings
FIG. 1 is a schematic flow chart of a method for determining a performance parameter of a regenerator according to an embodiment of the present invention;
fig. 2 is a graph of the reshaped differential gain of the multi-level PAM signal shaper provided by the present example;
FIG. 3 is a schematic diagram of a general structure of a regenerator provided in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a general structure of a regenerator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an all-optical shaper according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a tunable all-optical shaper according to an embodiment of the present invention;
FIG. 7 is a graph of reshaped differential gain curves corresponding to different predetermined phase shift values provided by an embodiment of the present invention;
fig. 8 is a first schematic structural diagram of a multi-level PAM signal shaper provided in this example;
fig. 9 is a schematic structural diagram of a multi-level PAM signal shaper provided in this example;
FIG. 10 is a graph of reshaped differential gain for different first coefficients provided by the present example
Fig. 11 is a schematic structural diagram of a performance parameter determining apparatus for a regenerator according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
An embodiment of the present invention provides a method for determining a performance parameter of a regenerator, and fig. 1 is a schematic flow chart of the method for determining a performance parameter of a regenerator provided in the embodiment of the present invention, as shown in fig. 1, including the following steps:
step 101, determining a reshaping power transfer function and a reamplifying gain of a regenerator according to the power transfer function of the regenerator; the re-amplification gain is indicative of a re-amplification performance of the regenerator;
step 102, determining a reshaping differential gain of the regenerator according to a reshaping power transfer function of the regenerator; the reshaping differential gain is indicative of the reshaping performance of the regenerator.
The method for determining the performance parameters of the regenerator provided by the embodiment of the invention is suitable for the regenerator of a multi-level PAM signal.
In an embodiment of the present invention, the power transfer function of the regenerator is used to indicate the power relationship between the input optical signal and the output optical signal of the regenerator; the reshaping function transfer function of the regenerator is used for indicating the relationship between the reshaping input power and the reshaping output power corresponding to the reshaping module of the regenerator.
In an optical fiber transmission system, amplitude attenuation and waveform distortion of an optical signal are caused by the combined action of factors such as dispersion and channel attenuation, and a regenerator is required to regenerate the amplitude and shape of a damaged signal every transmission distance.
In the embodiment of the present invention, the shaping module of the regenerator is configured to re-amplify and re-shape the input optical signal, so as to accurately and effectively determine the re-amplification performance and the re-shaping performance of the regenerator; decomposing the power transfer function of the regenerator into a reshaping power transfer function and a re-amplifying gain of a shaping module according to the corresponding relation between the input optical signal of the regenerator and the input optical signal of the shaping module; the re-amplification performance of the regenerator is indicated by the re-amplification gain. Determining the change conditions of the reshaping input power and the reshaping output power corresponding to the reshaping module according to the reshaping power transfer function, and determining the reshaping differential gain of the regenerator based on the change conditions; the reshaping performance of the regenerator is indicated by the reshaping differential gain.
The regeneration technique of the regenerator includes: re-amplifying and re-shaping; in the related art, the regeneration performance of the regenerator is evaluated by the power transfer function of the regenerator, which also reflects the re-amplification performance of the regenerator, so that the jitter suppression ratio determined by the power transfer function of the regenerator cannot be directly evaluated when determining the reshaping performance of the regenerator. In contrast, in the embodiment of the present invention, a re-amplification gain and a re-shaping differential gain are determined according to the power transfer function of the regenerator; the re-amplifying performance and the re-shaping performance of the regenerator are respectively determined by the re-amplifying gain and the re-shaping differential gain, so that the re-shaping performance and the re-amplifying performance of the regenerator can be more accurately and objectively evaluated.
Optionally, the power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain have the following relationships:
Pout＝Gpout；
wherein, the Pout＝F(Pin) Is the power transfer function of the regenerator, PoutTo output power, PinIs the input power; g is the re-amplification gain; said f is a reshaping power transfer function of said regenerator; the reshaping power transfer function of the regenerator satisfies: p is a radical ofout＝f(pin) (ii) a Said p isoutFor the reshaped output power, the pinFor the reshaped inputPower, and pin＝Pin。
In an embodiment of the present invention, the regenerator is configured to re-amplify and reshape the input optical signal; the power transfer function of the regenerator is a product of a reshaping power transfer function of the regenerator and the re-amplification gain.
Illustratively, the power P of the regenerator input optical signal is determined according to the structural parameters of the regeneratorinAnd the power p of the input optical signal of the shaping module of said regeneratorinThe relationship of (1); determining a reshaping power transfer function and the reamplifying gain of the regenerator according to a relationship between the power transfer function of the regenerator and the reshaping power transfer function and the reamplifying gain of the regenerator.
For example, if it is determined that the power of the input optical signal of the regenerator and the power of the input optical signal of the shaping module of the regenerator satisfy: pin＝pin(ii) a The power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain may be as follows: f (p)in)＝Gf(pin) (ii) a And determining a reshaping power transfer function and the reamplifying gain of the regenerator according to the relation.
Optionally, the reshaped differential gain has the following relationship with a reshaped power transfer function of the regenerator and the reshaped input power:
Figure BDA0002962571120000081
wherein the g is the reshaping differential gain.
In an embodiment of the invention, the reshaped differential gain of the regenerator is a derivative of the reshaped power transfer function of the regenerator with respect to the reshaped input power, i.e. the reshaped differential gain represents a slope value at any point on a curve of the reshaped power transfer function of the regenerator.
Illustratively, the reshaped differential gain of the regenerator may be obtained by a derivative operation on a reshaped power transfer function of the regenerator.
Optionally, the method further comprises:
determining a jitter suppression ratio of the regenerator based on a reshaped differential gain of the regenerator;
determining the power of an input optical signal which can be shaped by the regenerator according to the jitter suppression ratio of the regenerator;
wherein a jitter suppression ratio of the regenerator satisfies: r is-10 log10G |; the r is the jitter suppression ratio; the g is the reshaped differential gain.
In the embodiment of the invention, the jitter suppression ratio is used for indicating the amplitude jitter condition of the output optical signal and the input optical signal in the regenerator; the regeneration effect of the regenerator can be determined according to the amplitude jitter conditions of the input optical signal and the output optical signal. The larger the jitter suppression ratio of the regenerator, the better the reshaping performance of the regenerator on the signal.
According to a relational expression between a jitter suppression ratio of the regenerator and the reshaping differential gain, if an absolute value of the reshaping differential gain is less than 1, a jitter suppression ratio r of the regenerator is greater than 0; the jitter of the output signal of the regenerator is reduced, the compression effect on noise is achieved, and the signal quality is improved;
if the absolute value of the reshaping differential gain is equal to 0, the jitter suppression ratio r of the regenerator is ∞; the jitter of the output signal of the regenerator is zero and the noise is fully compressed to zero;
if the absolute value of the reshaping differential gain is equal to 1, the jitter suppression ratio r of the regenerator is 0; the jitter of the output signal of the regenerator is unchanged, and the signal is neither regenerated by the regenerator nor degraded;
if the absolute value of the reshaping differential gain is greater than 1, the jitter suppression ratio r of the regenerator is less than 0; jitter of the output signal of the regenerator becomes large and signal quality deteriorates.
Optionally, the determining the power of the input optical signal that can be shaped by the regenerator according to the jitter suppression ratio of the regenerator includes:
determining the power of the input optical signal which can be shaped by the regenerator according to the jitter suppression ratio corresponding to the input optical signal; wherein the content of the first and second substances,
when r <0, the regenerator is characterized to have no reshaping performance, and the quality of the optical signal output by the regenerator is degraded;
when r is 0, the regenerator is characterized to have no reshaping performance, and the quality of an optical signal output by the regenerator is unchanged;
when r >0, the regenerator is characterized by reshaping performance, and the quality of the optical signal output by the regenerator is improved.
In the embodiment of the invention, the jitter suppression ratio is determined according to the reshaping differential gain of the regenerator; and determining the power of the input optical signal of the regenerator corresponding to r >0 as the power of the input optical signal which can be shaped by the regenerator according to the jitter suppression ratio.
Exemplarily, the reshaped differential gain of the multi-level PAM signal shaper
Figure BDA0002962571120000091
As shown in fig. 2, fig. 2 is a graph of the reshaped differential gain of the multi-level PAM signal shaper provided by the present example; wherein, the reference numerals 21 and 22 indicate two input level points corresponding to r ═ 0, and r corresponding to the level power range between the two input level points is greater than or equal to 0; the level power range between the two input level points may be determined as the power of the input level that the multi-level PAM signal shaper can shape.
Alternatively, as shown in fig. 3, fig. 3 is a schematic diagram of a general structure of a regenerator according to an embodiment of the present invention. The regenerator includes:
the MZI shaping module, the first directional coupler and the second directional coupler; wherein the MZI shaping module comprises: an upper arm and a lower arm juxtaposed to the upper arm;
the output end of the first directional coupler is connected with the input end of the MZI shaping module, and is configured to split the input optical signal into two optical signals, which are transmitted to the upper arm and the lower arm of the MZI shaping module, respectively;
an upper arm of the MZI shaping module, which is used for generating a first phase shift for an optical signal input to the upper arm; a lower arm of the MZI shaping module for a second phase shift of an optical signal input to the lower arm;
and the input end of the second directional coupler is connected with the output end of the MZI shaping module and is used for coupling the optical signals output by the upper arm and the lower arm to obtain the shaped optical signals.
In an embodiment of the present invention, the upper arm includes: an optical nonlinear unit; the lower arm includes: an optical non-linear element and/or an optical phase shifter. As shown in fig. 4, fig. 4 is a schematic diagram of a general structure of a regenerator according to an embodiment of the present invention.
The amplitude transmission coefficient corresponding to the upper arm of the MZI shaping module is R1The first phase shift generated by the upper arm is
Figure BDA0002962571120000101
The amplitude transmission coefficient corresponding to the lower arm is R2The second phase shift generated by the lower arm is
Figure BDA0002962571120000102
It should be noted that the first phase shift and the second phase shift may be determined according to actual situations; for example, if the upper arm comprises: a nonlinear optical fiber, the lower arm comprising: linear fiber, the first phase shift is a non-linear phase shift, and the second phase shift is a linear phase shift. If the upper arm comprises: a linear optical fiber, the lower arm comprising: a nonlinear fiber, the first phase shift being a linear phase shift and the second phase shift being a nonlinear phase shift.
Determining a re-amplification gain and a re-shaping power transfer function of the regenerator according to the power transfer function of the regenerator, the input power of the regenerator and the re-shaping input power of the MZI shaping module in the regenerator; determining a reshaped differential gain of the regenerator by performing a derivative operation on a reshaped power transfer function.
Optionally, the power transfer function P of the regeneratorout＝F(Pin) Comprises the following steps:
Figure BDA0002962571120000111
wherein, the PoutIs the output power of the regenerator; the P isinIs the input power of the regenerator; the rho1Is the through efficiency of the first directional coupler; the rho2Is the shoot-through efficiency of the second directional coupler; the above-mentioned
Figure BDA0002962571120000112
For the phase difference of the upper and lower arms of the MZI shaping module
Figure BDA0002962571120000113
The above-mentioned
Figure BDA0002962571120000114
A first phase shift corresponding to an upper arm of the MZI shaping module; the above-mentioned
Figure BDA0002962571120000115
A second phase shift corresponding to the lower arm of the MZI shaping module; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2And the amplitude transmission coefficient of the lower arm of the MZI shaping module.
In an embodiment of the invention, the power transfer function of the regenerator is determined according to structural parameters of the regenerator. Determining a reshaping power transfer function and a reamplifying gain of the regenerator according to a relation between the power transfer function of the regenerator and the reshaping power transfer function and the reamplifying gain of the regenerator; and carrying out derivation operation on the reshaping power of the regenerator to obtain the reshaping differential gain of the regenerator.
The structural parameters of the regenerator include: amplitude transmission coefficients of upper and lower arms of the MZI shaping module, a phase difference between the upper and lower arms, and pass-through efficiencies of the first and second directional couplers.
Optionally, the determining a reshaping power transfer function and a reamplifying gain of the regenerator according to the power transfer function of the regenerator comprises:
the re-amplification gain is:
Figure BDA0002962571120000116
reshaping power transfer function p of said regeneratorout＝f(pin) Comprises the following steps:
Figure BDA0002962571120000117
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping an input power for the MZI shaping module; the above-mentioned
Figure BDA0002962571120000118
For a non-linear phase shift difference of said MZI shaping module
Figure BDA0002962571120000119
Is the linear phase shift difference of the MZI shaping module, and
Figure BDA00029625711200001110
in the embodiment of the invention, the reshaping power transfer function and the reamplifying gain of the regenerator are determined according to the power transfer function of the regenerator and the relation between the input power of the regenerator and the input power of the MZI reshaping module.
Exemplarily according to fig. 3The input power of the regenerator and the reshaped input power of the MZI shaping module satisfy: pin＝pinAnd the relationship between the reshaping power transfer function of the regenerator and the reamplifying gain satisfies: pout＝Gpout(ii) a The power transfer function of the regenerator is then:
Figure BDA0002962571120000121
the re-amplification gain of the regenerator is:
Figure BDA0002962571120000122
the reshaping power transfer function is:
Figure BDA0002962571120000123
wherein, the
Figure BDA0002962571120000124
A phase difference of an upper arm and a lower arm of the MZI shaping module, the phase difference of the upper arm and the lower arm comprising: a linear phase difference and a nonlinear phase difference;
the reshaping power transfer function is then:
Figure BDA0002962571120000125
wherein, the
Figure BDA0002962571120000126
For a non-linear phase shift difference of said MZI shaping module
Figure BDA0002962571120000127
Is the linear phase shift difference of the MZ I shaping module.
Optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA0002962571120000128
b is a second coefficient; the linear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA0002962571120000129
and m is an integer.
As shown in fig. 5, fig. 5 is a schematic structural diagram of an all-optical shaper according to an embodiment of the present invention. The upper arm of the regenerator corresponding to that shown in fig. 4 is a nonlinear unit and the lower arm is a linear fiber (here, the optical phase shifter is implemented by a linear fiber).
The output end of the first directional coupler is connected with the upper arm and the lower arm of the MZI shaping module respectively, the input end of the second directional coupler is connected with the upper arm and the lower arm of the MZI shaping module, and the output end of the second directional coupler outputs the shaped optical signal. An input optical signal is input to an input end of a first directional coupler, the first directional coupler decomposes the input optical signal into two optical signals, and the two optical signals are respectively input to an upper arm and a lower arm of the MZI shaping module; carrying out nonlinear phase shift on one optical signal in the two optical signals through a nonlinear optical fiber in the upper arm; performing linear phase shift on the other optical signal in the two optical signals through a linear optical fiber in the lower arm; and coupling the two paths of optical signals output by the upper arm and the lower arm through a second directional coupler to obtain a shaped optical signal, and outputting the shaped optical signal to the all-optical shaper.
The all-optical shaper shown in fig. 5 corresponds to the regenerator shown in fig. 4, in which the upper arm is a nonlinear fiber and the lower arm is an optical phase shifter (here, the optical phase shifter is implemented by a linear fiber).
In this embodiment of the present invention, the nonlinear phase shift difference generated by the MZI shaping module is:
Figure BDA0002962571120000131
b is a second coefficient; the M isThe linear phase shift difference generated by the ZI shaping module is:
Figure BDA0002962571120000132
the reshaping power transfer function corresponding to the all-optical shaper is:
Figure BDA0002962571120000133
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping an input power for the MZI shaping module; the rho1Is the through efficiency of the first directional coupler; the rho2Is the shoot-through efficiency of the second directional coupler; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2And the amplitude transmission coefficient of the lower arm of the MZI shaping module.
Optionally, the determining a reshaped differential gain of the regenerator from a reshaped power transfer function of the regenerator comprises:
the reshaped differential gain of the regenerator is: g is 1+ a cos x-ax sin x;
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure BDA0002962571120000134
And 0<a<1; x is a first parameter, and x is bpin。
In the embodiment of the present invention, the reshaping differential gain of the all-optical shaper is determined by deriving the reshaping power transfer function corresponding to the all-optical shaper.
Illustratively, the reshaped differential gain of the all-optical shaper is:
Figure BDA0002962571120000141
order to
Figure BDA0002962571120000142
Then the reshaping differential gain of the all-optical shaper is: g 1+ a cos (bp)in)-abpinsin(bpin)；
For the convenience of analysis, a first parameter x is introduced, and x is made to be bpinThen, the reshaping differential gain of the all-optical shaper is: g ═ 1+ acosx-axsinx.
Wherein a is a first coefficient and 0<a<1; x is a first parameter, b is a second coefficient, pinThe power of an input optical signal of the MZI shaping module.
In the embodiment of the invention, the first coefficient is related to the level number of the input optical signal reproducible by the all-optical shaper; and reducing the value of the first coefficient, and increasing the level number of the input optical signal reproducible by the all-optical shaper corresponding to the first coefficient.
The second coefficient indicates the power amplification condition of the MZI shaping module on the input optical signal; by adjusting the second coefficient, the operating range of the input optical signal that can be shaped by the all-optical shaper can be changed.
It should be noted that the MZI shaping module in the embodiment of the present invention may be used to reshape and reamplify an input optical signal; the reshaped differential gain of the regenerator is related to a first parameter x (i.e., bp)in) Correlation; determining said first parameter based on a reshaping performance requirement of said regenerator and a reshaping differential gain of said regenerator; keeping the first parameter constant, the reshaped input power p of the regenerator may be adjusted by changing the value of the second coefficient bin(i.e., adjusting the operating range of the regenerator).
In some embodiments, the regeneration performance of the all-optical shaper can be optimized by adjusting the value of the first coefficient; and/or adjusting the power range of the input optical signal of the all-optical shaper by adjusting the value of the second coefficient.
In other embodiments, a jitter suppression ratio of the all-optical shaper is determined based on a reshaped differential gain of the all-optical shaper; and determining the power of the shapeable input optical signal of the all-optical shaper according to the jitter suppression ratio. Wherein the content of the first and second substances,
when r is less than 0, the all-optical shaper is characterized to have no reshaping performance, and the quality of an optical signal output by the all-optical shaper is degraded;
when r is 0, the all-optical shaper is characterized to have no reshaping performance, and the quality of an optical signal output by the all-optical shaper is unchanged;
and when r is greater than 0, the all-optical shaper is characterized to have reshaping performance, and the quality of an optical signal output by the all-optical shaper is improved.
Exemplarily, determining power points a1 and a2 of the input optical signal corresponding to the jitter suppression ratio r being 0 according to the reshaped differential gain curve of the all-optical shaper; if the jitter suppression ratio r corresponding to the power range between the power points A1 and A2 is more than or equal to 0; the power range between the power points a1 and a2 may be determined as the power of the input optical signal that the all-optical shaper can shape.
Optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber and a tunable optical phase shifter; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA0002962571120000151
b is a second coefficient; and the linear phase shift difference of the MZI shaping module is the difference value of a preset phase shift value generated by the adjustable optical phase shifter and a second phase shift corresponding to the lower arm.
In the embodiment of the present invention, as shown in fig. 6, fig. 6 is a schematic structural diagram of a tunable all-optical shaper provided in the embodiment of the present invention.
The output end of the first directional coupler is connected with the upper arm and the lower arm of the MZI shaping module respectively, the input end of the second directional coupler is connected with the upper arm and the lower arm of the MZI shaping module, and the output end of the second directional coupler outputs the shaped optical signal.
An input optical signal is input to an input end of a first directional coupler, the first directional coupler decomposes the input optical signal into two optical signals, and the two optical signals are respectively input to an upper arm and a lower arm of the MZI shaping module; performing nonlinear phase shift on one of the two optical signals through a nonlinear optical fiber in the upper arm, and performing phase shift with a preset phase shift value on the one optical signal subjected to the nonlinear phase shift through a tunable optical phase shifter connected with the nonlinear optical fiber; performing linear phase shift on the other optical signal in the two optical signals through a linear optical fiber in the lower arm; and coupling the two paths of optical signals output by the upper arm and the lower arm through a second directional coupler to obtain a shaped optical signal, and outputting the shaped optical signal to the all-optical shaper.
The tunable all-optical shaper shown in fig. 6 corresponds to the regenerator shown in fig. 4, in which the upper arm is a nonlinear optical fiber and the lower arm is a tunable optical phase shifter. However, the preset phase shift value of the tunable optical phase shifter in the regenerator shown in fig. 4 and the preset phase shift value of the tunable optical phase shifter in the tunable all-optical shaper shown in fig. 6 are opposite numbers.
In this embodiment of the present invention, the nonlinear phase shift difference generated by the MZI shaping module is:
Figure BDA0002962571120000161
b is a second coefficient; and the linear phase shift difference of the MZI shaping module is the difference value of a preset phase shift value generated by the adjustable optical phase shifter and a second phase shift corresponding to the lower arm.
The reshaping power transfer function corresponding to the adjustable all-optical shaper is:
Figure BDA0002962571120000162
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping input power for the M ZI shaping module; the rho1Is the through efficiency of the first directional coupler; the rho2Is the firstThe straight-through efficiency of the two directional couplers; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2The amplitude transmission coefficient of the lower arm of the MZI shaping module; the above-mentioned
Figure BDA0002962571120000163
And the linear phase shift difference of the M ZI shaping module.
In some embodiments, to reduce the structural complexity of the tunable all-optical shaper, the amplitude transmission coefficient R of the linear fiber of the lower arm is made to be21, linear phase shift corresponding to the lower arm
Figure BDA0002962571120000164
I.e. the lower arm only serves a connecting function; the above-mentioned
Figure BDA0002962571120000165
A preset phase shift value generated for the tunable optical phase shifter.
Optionally, the determining a reshaped differential gain of the regenerator from a reshaped power transfer function of the regenerator comprises:
the reshaped differential gain of the regenerator is:
Figure BDA0002962571120000166
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure BDA0002962571120000167
And 0<a<1; y is a second parameter, the
Figure BDA0002962571120000168
The described
Figure BDA0002962571120000171
Is the linear phase shift difference of the MZI shaping module.
In the embodiment of the present invention, the reshaping differential gain of the all-optical shaper is determined by deriving the reshaping power transfer function corresponding to the all-optical shaper.
Figure BDA0002962571120000172
Order to
Figure BDA0002962571120000173
The reshaping differential gain of the adjustable all-optical shaper is:
Figure BDA0002962571120000174
for convenient analysis, a second parameter y is introduced to enable
Figure BDA0002962571120000175
Then the reshaping differential gain corresponding to the MZI shaping module of the adjustable all-optical shaper is:
Figure BDA0002962571120000176
in some embodiments, for ease of analysis, the corresponding second phase shift of the lower arm is made
Figure BDA0002962571120000177
Then the
Figure BDA0002962571120000178
A preset phase shift value generated for the tunable optical phase shifter.
It should be noted that, with respect to the all-optical shaper, the tunable optical phase shifter in the tunable all-optical shaper shifts the input optical signal to the left
Figure BDA0002962571120000179
The amount of change in the reshaped differential gain is
Figure BDA00029625711200001710
In other embodiments, the regeneration performance of the tunable all-optical shaper can be optimized by adjusting the preset phase shift value of the tunable optical phase shifter.
As an example, as shown in fig. 7, fig. 7 is a graph of reshaped differential gain curves corresponding to different preset phase shift values provided by the embodiment of the present invention. Wherein the input optical signal is a PAM4 signal, and the power level of the PAM4 signal is 0.15W, 0.45W, 0.75W and 1.05W; reference numeral 71 denotes the preset phase shift value
Figure BDA00029625711200001711
A corresponding reshaped differential gain curve; reference numeral 72 denotes the preset phase shift value
Figure BDA00029625711200001712
A corresponding reshaped differential gain curve; namely that
Figure BDA00029625711200001713
Corresponding reshaped differential gain curve compared to the predetermined phase shift value
Figure BDA00029625711200001714
The corresponding reshaped differential gain curve, shifted 0.05 to the right; as can be seen from FIG. 7, the predetermined phase shift value
Figure BDA00029625711200001715
The shaping performance of the corresponding adjustable all-optical shaper is superior to the preset phase shift value
Figure BDA00029625711200001716
The shaping performance of the corresponding adjustable all-optical shaper.
In other embodiments, the jitter suppression ratio of the adjustable all-optical shaper is determined according to the reshaped differential gain of the adjustable all-optical shaper; and determining the power of the input optical signal which can be shaped by the adjustable all-optical shaper according to the jitter suppression ratio. Wherein the content of the first and second substances,
when r is less than 0, the tunable all-optical shaper is characterized by having no reshaping performance, and the quality of an optical signal output by the tunable all-optical shaper is degraded;
when r is 0, the tunable all-optical shaper is characterized to have no reshaping performance, and the quality of an optical signal output by the tunable all-optical shaper is unchanged;
and when r is greater than 0, the tunable all-optical shaper is characterized to have reshaping performance, and the quality of an optical signal output by the tunable all-optical shaper is improved.
Exemplarily, the power points a1 and a2 of the input optical signal corresponding to the jitter suppression ratio r being 0 are determined according to the reshaped differential gain curve of the adjustable all-optical shaper; if the jitter suppression ratio r corresponding to the power range between the power points A1 and A2 is more than or equal to 0; the power range between the power points a1 and a2 can be determined as the power of the input optical signal that the tunable all-optical shaper can shape.
In conjunction with the above-described embodiments of the present invention, an exemplary application of the embodiments of the present invention in a practical application scenario will be described below.
The embodiment of the invention provides a method for determining performance parameters of a regenerator, which comprises the following steps:
step 201, determining a reshaping power transfer function and a reamplifying gain of a regenerator according to the power transfer function of the regenerator;
step 202, determining a reshaping differential gain of the regenerator according to a reshaping power transfer function of the regenerator.
Exemplarily, taking a multi-level PAM signal shaper in patent CN201610163853.6 as an example, fig. 8 is a first structural schematic diagram of a multi-level PAM signal shaper provided in this example. As shown in fig. 8, the multi-level PAM signal shaper includes: a linear matching optical amplifier and an MZI shaping module; wherein the MZI shaping module comprises: an input coupler, an output coupler, an optical nonlinear element, and an optical phase shifter.
It should be noted that, if the upper arm of the regenerator shown in fig. 4 is a nonlinear optical fiber, the lower arm is an optical phase shifter, and the predetermined phase shift value of the optical phase shifter is
Figure BDA0002962571120000191
In this case, the regenerator is equivalent to the multilevel PAM signal shaper shown in fig. 8.
Determining a power transfer function P of the multi-level PAM signal shaper according to the level power of the input PAM signal of the multi-level PAM signal shaper and the level power of the input PAM signalout＝F(Pin) (ii) a Determining a relation between an input PAM signal of the multi-level PAM signal shaper and an input PAM signal of the MZI shaping module according to the linear matching amplifier; determining a re-amplification gain G of the MZI shaping module to 0.8389 according to a relation among a power transfer function of a multi-level PAM signal shaper, a re-shaping power transfer function of the multi-level PAM signal shaper and the re-amplification gain, and a re-shaping differential gain
Figure BDA0002962571120000192
Further exemplarily, taking the multi-level PAM signal shaper in patent CN201811367044.2 as an example, as shown in fig. 9, fig. 9 is a schematic structural diagram two of the multi-level PAM signal shaper provided in this example.
It should be noted that, if the upper arm of the regenerator shown in fig. 4 is an embedded MZI module (optical nonlinear unit), the lower arm is a nonlinear optical fiber; in this case the regenerator is equivalent to the multi-level PAM signal shaper shown in fig. 9.
Determining a power transfer function P of the multi-level PAM signal shaper according to the level power of the output PAM signal and the level power of the input PAM signal of the multi-level PAM signal shaperout＝F(Pin) (ii) a Determining a re-amplification gain and a re-shaping power transfer function of the multi-level PAM signal shaper according to the power transfer function; determining the reshaped differential gain based on the reshaped power transfer function. The regeneration performance of the multi-level PAM signal shaper may be optimized by adjusting the value of the first coefficient in the reshaped differential gain.
As shown in fig. 10, fig. 10 is a graph of reshaped differential gain for different first coefficients provided by the present example. Wherein the reference numerals1001 is the first coefficient
Figure BDA0002962571120000193
A corresponding reshaped differential gain; reference numeral 1002 is a first coefficient
Figure BDA0002962571120000194
The corresponding reshaped differential gain. As can be seen from FIG. 10, for an input amplitude level of
Figure BDA0002962571120000195
And
Figure BDA0002962571120000196
and all of them have a PAM4 signal with a Gaussian noise with amplitude jitter of 0.02, the first coefficient
Figure BDA0002962571120000201
The corresponding reshaped differential gain is smaller than the first coefficient
Figure BDA0002962571120000202
Corresponding reshaped differential gain, then said first coefficient
Figure BDA0002962571120000203
The shaping performance of the corresponding multi-level PAM signal shaper is superior to the first coefficient
Figure BDA0002962571120000204
Shaping performance of the corresponding multi-level PAM signal shaper.
In the regenerator provided in the embodiment of the present invention, if the structure of the regenerator satisfies: the ratio of the amplitude transmission coefficients of the upper arm and the lower arm is a fixed value, and the phase difference between the upper arm and the lower arm is in a linear relation with the power of an input optical signal; the performance parameters of the regenerator can be determined by using the method for determining the performance parameters of the all-optical shaper or the method for determining the performance parameters of the adjustable all-optical shaper, which is provided by the embodiment of the invention.
Next, an embodiment of the present invention provides a performance parameter determining apparatus for a regenerator, as shown in fig. 11, and fig. 11 is a schematic structural diagram of the performance parameter determining apparatus for a regenerator provided in the embodiment of the present invention. The device comprises:
an amplification gain determination module for determining a reshaping power transfer function and a re-amplification gain of the regenerator according to the power transfer function of the regenerator;
a shaping gain determination module for determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator.
Optionally, the power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain have the following relationships:
Pout＝Gf；
wherein, the Pout＝F(Pin) Is the power transfer function of the regenerator, PoutTo output power, PinIs the input power; g is the re-amplification gain; the f is a reshaping power transfer function of the regenerator.
Optionally, the reshaping power transfer function of the regenerator satisfies:
pout＝f(pin)；
wherein, the p isoutTo reshape the output power, pinTo reshape the input power.
Optionally, the reshaped differential gain has a relationship with a reshaped power transfer function of the regenerator and the reshaped input power as follows:
Figure BDA0002962571120000211
wherein g is the reshaped differential gain.
Optionally, the apparatus further comprises: an operating power determination module to:
determining a jitter suppression ratio of the regenerator based on a reshaped differential gain of the regenerator;
determining the power of an input optical signal which can be shaped by the regenerator according to the jitter suppression ratio of the regenerator;
wherein a jitter suppression ratio of the regenerator satisfies: r is-10 log10G |; r is a jitter suppression ratio; the g is the reshaped differential gain.
Optionally, the regenerator comprises: the MZI shaping module, the first directional coupler and the second directional coupler; wherein the MZI shaping module comprises: an upper arm and a lower arm juxtaposed to the upper arm;
the output end of the first directional coupler is respectively connected with the input end of the MZI shaping module, and is used for decomposing the input optical signal into two optical signals which are respectively transmitted to the upper arm and the lower arm of the MZI shaping module;
an upper arm of the MZI shaping module, which is used for generating a first phase shift for an optical signal input to the upper arm; a lower arm of the MZI shaping module for a second phase shift of an optical signal input to the lower arm;
and the input end of the second directional coupler is connected with the output end of the MZI shaping module and is used for coupling the optical signals output by the upper arm and the lower arm to obtain the shaped optical signals.
Optionally, the power transfer function P of the regeneratorout＝F(Pin) Comprises the following steps:
Figure BDA0002962571120000212
wherein, the PoutIs the output power of the regenerator; the P isinIs the input power of the regenerator; the rho1Is the through efficiency of the first directional coupler; the rho2Is the shoot-through efficiency of the second directional coupler; the above-mentioned
Figure BDA0002962571120000221
For the upper and lower arms of the MZI shaping modulePhase difference of arms of
Figure BDA0002962571120000222
The above-mentioned
Figure BDA0002962571120000223
A first phase shift corresponding to an upper arm of the MZI shaping module; the above-mentioned
Figure BDA0002962571120000224
A second phase shift corresponding to the lower arm of the MZI shaping module; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2And the amplitude transmission coefficient of the lower arm of the MZI shaping module.
Optionally, the determining a shaping power transfer function and a re-amplification gain of the regenerator according to the power transfer function of the regenerator includes:
the re-amplification gain is:
Figure BDA0002962571120000225
shaping power transfer function p of said regeneratorout＝f(pin) Comprises the following steps:
Figure BDA0002962571120000226
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping an input power for the MZI shaping module; the above-mentioned
Figure BDA0002962571120000227
For a non-linear phase shift difference of said MZI shaping module
Figure BDA0002962571120000228
Is the linear phase shift difference of the MZI shaping module, and
Figure BDA0002962571120000229
optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA00029625711200002210
b is a second coefficient; the linear phase shift difference of the MZI shaping module is as follows:
Figure BDA00029625711200002211
and m is an integer.
Optionally, the shaping gain determining module is configured to:
the reshaped differential gain of the regenerator is: g is 1+ a cos x-ax sin x;
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure BDA00029625711200002212
And 0<a<1; x is a first parameter, and x is bpin。
Optionally, the upper arm of the MZI shaping module includes: a nonlinear optical fiber and a tunable optical phase shifter; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure BDA00029625711200002213
b is a second coefficient; and the linear phase shift difference of the MZI shaping module is the difference value of a preset phase shift value generated by the adjustable optical phase shifter and a second phase shift corresponding to the lower arm.
Optionally, the shaping gain determining module is configured to:
the reshaped differential gain of the regenerator is:
Figure BDA0002962571120000231
wherein g is a reshaped differentialGain; a is a first coefficient, a
Figure BDA0002962571120000232
And 0<a<1; y is a second parameter, the
Figure BDA0002962571120000233
The above-mentioned
Figure BDA0002962571120000234
Is the linear phase shift difference of the MZI shaping module.
An embodiment of the present invention further provides an electronic device, where the electronic device includes:
a memory for storing executable instructions;
a processor, configured to execute the executable instructions stored in the memory, and implement the method for determining the performance parameter of the regenerator according to one or more of the foregoing technical solutions.
Wherein the memory may include: various types of storage media may be used for data storage. In this embodiment, the storage medium included in the memory is at least partially a non-volatile storage medium, and may be used to store the computer program.
The processor may include: a central processor, a microprocessor, a digital signal processor, an application specific integrated circuit or a programmable array, etc., may be used in the method for determining parameters of an all-optical shaper provided by one or more of the foregoing aspects of a computer program.
In this embodiment, the processor may be connected to the memory via an intra-device bus, such as an integrated circuit bus.
An embodiment of the present invention further provides a computer storage medium, where a computer program is stored, and the computer program is executed by a processor, and executes a method for determining a performance parameter of a regenerator provided in one or more of the foregoing technical solutions, for example, the method shown in fig. 1 may be executed.
The computer storage medium provided by the embodiment of the invention comprises: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. Alternatively, the computer storage medium may be a non-transitory storage medium. The non-transitory storage medium herein may also be referred to as a non-volatile storage medium.
The above description is only an example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.

Claims (11)

1. A method for determining a performance parameter of a regenerator, comprising:
determining a reshaping power transfer function and a reamplifying gain of a regenerator according to the power transfer function of the regenerator; the re-amplification gain is indicative of a re-amplification performance of the regenerator;
determining a reshaping differential gain of the regenerator based on a reshaping power transfer function of the regenerator, the reshaping differential gain being indicative of a reshaping performance of the regenerator;
the power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain have the following relationships:
Pout＝Gpout；
wherein, the Pout＝F(Pin) Is the power transfer function of the regenerator, PoutTo output power, PinIs the input power; g is the re-amplification gain; said p isout＝f(pin) For the reshaping power transfer function of the regenerator, said poutFor reshaping the output power, pinTo reshape the input power, and pin＝Pin；
The reshaped differential gain has the following relationship with a reshaped power transfer function of the regenerator and the reshaped input power:
Figure FDA0003459895700000011
wherein g is the reshaped differential gain.
2. The method of claim 1, further comprising:
determining a jitter suppression ratio of the regenerator based on a reshaped differential gain of the regenerator;
determining the power of an input optical signal which can be shaped by the regenerator according to the jitter suppression ratio of the regenerator;
wherein a jitter suppression ratio of the regenerator satisfies: r is-10 log10G |; r is a jitter suppression ratio; the g is the reshaped differential gain.
3. The method of claim 2, wherein determining the power of the input optical signal that the regenerator can shape based on the jitter suppression ratio of the regenerator comprises:
determining the power of the input optical signal which can be shaped by the regenerator according to the jitter suppression ratio corresponding to the input optical signal; wherein the content of the first and second substances,
when r <0, the regenerator is characterized to have no reshaping performance, and the quality of the optical signal output by the regenerator is degraded;
when r is 0, the regenerator is characterized to have no reshaping performance, and the quality of an optical signal output by the regenerator is unchanged;
when r >0, the regenerator is characterized by reshaping performance, and the quality of the optical signal output by the regenerator is improved.
4. The method of any of claims 1-3, wherein the regenerator comprises: the MZI shaping module, the first directional coupler and the second directional coupler; wherein the MZI shaping module comprises: an upper arm and a lower arm juxtaposed to the upper arm;
the output end of the first directional coupler is respectively connected with the input end of the MZI shaping module, and is used for decomposing an input optical signal into two optical signals which are respectively transmitted to the upper arm and the lower arm of the MZI shaping module;
an upper arm of the MZI shaping module, which is used for generating a first phase shift for an optical signal input to the upper arm; a lower arm of the MZI shaping module for a second phase shift of an optical signal input to the lower arm;
and the input end of the second directional coupler is connected with the output end of the MZI shaping module and is used for coupling the optical signals output by the upper arm and the lower arm to obtain the shaped optical signals.
5. Method according to claim 4, characterized in that the power transfer function P of the regeneratorout＝F(Pin) Comprises the following steps:
Figure FDA0003459895700000021
wherein, the PoutIs the output power of the regenerator; the P isinIs the input power of the regenerator; the rho1Is the through efficiency of the first directional coupler; the rho2Is the shoot-through efficiency of the second directional coupler; the above-mentioned
Figure FDA0003459895700000022
For the phase difference of the upper and lower arms of the MZI shaping module
Figure FDA0003459895700000023
The above-mentioned
Figure FDA0003459895700000024
A first phase shift corresponding to an upper arm of the MZI shaping module; the above-mentioned
Figure FDA0003459895700000025
A second phase shift corresponding to the lower arm of the MZI shaping module; the R is1The amplitude transmission coefficient of the upper arm of the MZI shaping module is obtained; the R is2And the amplitude transmission coefficient of the lower arm of the MZI shaping module.
6. The method of claim 5, wherein determining the reshaped power transfer function and reamplification gain of the regenerator based on the power transfer function of the regenerator comprises:
the re-amplification gain is:
Figure FDA0003459895700000031
reshaping power transfer function p of said regeneratorout＝f(pin) Comprises the following steps:
Figure FDA0003459895700000032
wherein, the p isoutReshaping an output power for the MZI shaping module; said p isinReshaping an input power for the MZI shaping module; the above-mentioned
Figure FDA0003459895700000033
For a non-linear phase shift difference of said MZI shaping module
Figure FDA0003459895700000034
Is the linear phase shift difference of the MZI shaping module, and
Figure FDA0003459895700000035
7. the method of claim 6, wherein an upper arm of the MZI shaping module comprises: a nonlinear optical fiber; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure FDA0003459895700000036
b is a second coefficient; the linear phase shift difference of the MZI shaping module is as follows:
Figure FDA0003459895700000037
m is an integer;
said determining a reshaped differential gain of said regenerator based on a reshaped power transfer function of said regenerator comprises:
the reshaped differential gain of the regenerator is: g ═ 1+ acosx-axsinx;
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure FDA0003459895700000038
And 0<a<1; x is a first parameter, and x is bpin。
8. The method of claim 6, wherein an upper arm of the MZI shaping module comprises: a nonlinear optical fiber and a tunable optical phase shifter; the lower arm includes: a linear optical fiber;
wherein the nonlinear phase shift difference generated by the MZI shaping module is as follows:
Figure FDA0003459895700000039
b is a second coefficient; the linear phase shift difference of the MZI shaping module is the difference value of a preset phase shift value generated by the adjustable optical phase shifter and a second phase shift corresponding to the lower arm;
said determining a reshaped differential gain of said regenerator based on a reshaped power transfer function of said regenerator comprises:
the reshaped differential gain of the regenerator is:
Figure FDA0003459895700000041
wherein g is a reshaping differential gain; a is a first coefficient, a
Figure FDA0003459895700000042
And 0<a<1; y is a second parameter, the
Figure FDA0003459895700000043
B is a second coefficient, said
Figure FDA0003459895700000044
Is the linear phase shift difference of the MZI shaping module.
9. A performance parameter determining apparatus for a regenerator, comprising:
an amplification gain determination module for determining a reshaping power transfer function and a re-amplification gain of the regenerator according to the power transfer function of the regenerator;
a shaping gain determination module for determining a reshaping differential gain of the regenerator according to a reshaping power transfer function of the regenerator;
the power transfer function of the regenerator, the reshaping power transfer function of the regenerator, and the reamplifying gain have the following relationships:
Pout＝Gpout；
wherein, the Pout＝F(Pin) Is the power transfer function of the regenerator, PoutTo output power, PinIs the input power; g is the re-amplification gain; said p isout＝f(pin) For the reshaping power transfer function of the regenerator, the poutTo reshape the output power, pinTo reshape the input power, and pin＝Pin；
The reshaped differential gain has the following relationship with a reshaped power transfer function of the regenerator and the reshaped input power:
Figure FDA0003459895700000045
wherein g is the reshaped differential gain.
10. An electronic device, comprising:
a memory for storing executable instructions;
a processor for implementing the method of determining a performance parameter of a regenerator according to any of claims 1-8 when executing executable instructions stored in the memory.
11. A computer-readable storage medium, characterized in that the computer-readable storage medium stores executable instructions that, when executed by a processor, implement the method for determining a performance parameter of a regenerator according to any of claims 1-8.
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