CN111917481B - Transient suppression control method and device, optical fiber amplifier and readable storage medium - Google Patents

Transient suppression control method and device, optical fiber amplifier and readable storage medium Download PDF

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CN111917481B
CN111917481B CN202010763453.5A CN202010763453A CN111917481B CN 111917481 B CN111917481 B CN 111917481B CN 202010763453 A CN202010763453 A CN 202010763453A CN 111917481 B CN111917481 B CN 111917481B
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value
power
determining
control parameter
signal
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CN111917481A (en
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张亚洲
张皓
陈志�
邓福星
蔡潇
胡鹏
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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
    • H04B10/293—Signal power control
    • H04B10/2933—Signal power control considering the whole optical path
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Lasers (AREA)

Abstract

The embodiment of the application provides a transient suppression control method, a transient suppression control device, an optical fiber amplifier and a storage medium, wherein the method comprises the following steps: determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser; under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value; carrying out time delay processing on the power value of the current emergent light signal to obtain a signal value of time delay emergent light power; determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal; driving the pump laser at the first drive current value.

Description

Transient suppression control method and device, optical fiber amplifier and readable storage medium
Technical Field
The present disclosure relates to transient suppression control technologies, and in particular, to a transient suppression control method and apparatus, an optical fiber amplifier, and a computer-readable storage medium.
Background
In the related art, an optical Amplifier is a subsystem product capable of amplifying optical signals in an optical Fiber communication system, the optical Amplifier can directly amplify input optical signals, and an Erbium Doped Fiber Amplifier (EDFA) is the most widely applied optical Amplifier in the current optical Fiber communication, so how to improve the performance of the EDFA is very important.
Disclosure of Invention
Embodiments of the present application are intended to provide a method, an apparatus, a fiber amplifier and a computer storage medium for transient suppression control.
In a first aspect, an embodiment of the present application provides a transient suppression control method, where the method includes: determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser;
under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value;
carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal; the power value of the delayed light-emitting signal represents the power value of the light-emitting signal at a first target moment; the first target time is determined from a previous time set that the power value of the incoming optical signal is not subjected to transient change according to the time when the power value of the current incoming optical signal is subjected to transient change;
determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal;
driving the pump laser at the first drive current value.
In a second aspect, an embodiment of the present application provides a transient suppression control apparatus, including: a first control parameter determining module, a second control parameter determining module, a delay processing module, a first driving current value determining module and a driving module,
the first control parameter determining module is configured to determine a first control parameter value of the optical fiber amplifier according to the obtained power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser;
the second control parameter determining module is configured to determine a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value when the power value of the optical signal is determined to have an instantaneous increase;
the delay processing module is used for carrying out delay processing on the power value of the current emergent light signal to obtain the power value of the delayed emergent light signal; the power value of the delayed light-emitting signal represents the power value of the light-emitting signal at a first target moment; the first target time is determined from a previous time set that the power value of the incoming optical signal is not subjected to transient change according to the time when the power value of the current incoming optical signal is subjected to transient change;
the first driving current value determining module is configured to determine a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed outgoing optical signal, the second control parameter value, and an obtained feedforward compensation output signal value corresponding to the incoming optical signal;
the driving module is used for driving the pump laser by the first driving current value.
In a third aspect, an embodiment of the present application further provides an optical fiber amplifier, including:
a memory for storing executable instructions;
and a processor, configured to implement any of the above transient suppression control methods when executing the executable instructions stored in the memory.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium, which stores executable instructions for implementing any one of the transient suppression control methods described above when executed by a processor.
In the embodiment of the present application, the first driving current value of the pump laser is determined according to the power value of the current expected output signal, the power value of the delayed light output signal, the second control parameter value, and the feedforward compensation output signal value corresponding to the current light input signal, the second control parameter value is determined according to the first control parameter value and the first preset correction parameter value, and the first control parameter value is determined according to the power value of the current expected output signal, so that the first driving current value of the pump laser is determined according to the second control parameter value, so that transient suppression in a wide gain and wide wavelength range can be achieved for systems with different channel configuration rates and different gain ranges.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of an EDFA according to an embodiment of the present application;
fig. 2 is a flowchart of a transient suppression control method according to an embodiment of the present application;
fig. 3 is a schematic flow chart illustrating a process of obtaining a power value of an incident light signal and a power value of an emergent light signal based on a change of an incident light or emergent light Y gear according to an embodiment of the present application;
fig. 4 is a delay flow chart of the incident light power and the emergent light power according to the embodiment of the present application;
FIG. 5 is a diagram illustrating the changes of the proportional factor P and the integral factor I of the PID control in the transient state according to the embodiment of the present application;
fig. 6A is a schematic diagram of a waveform-increasing transient state when the minimum gain G is 10, 19dB dynamic according to an embodiment of the present application;
fig. 6B is a schematic diagram of a wave-dropping transient state in a dynamic state of 19dB with a minimum gain G of 10;
fig. 6C is a schematic diagram of a wave-amplifying transient state when the maximum gain G is 22, 19dB dynamic according to an embodiment of the present application;
fig. 6D is a schematic diagram of a wave-dropping transient state when the maximum gain G is 22, 19dB dynamic according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a transient suppression control device according to an embodiment of the present application.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the examples provided herein are merely illustrative of the present invention and are not intended to limit the present invention. In addition, the following embodiments are provided as partial embodiments for implementing the present invention, not all embodiments for implementing the present invention, and the technical solutions described in the embodiments of the present invention may be implemented in any combination without conflict.
It should be noted that, in the embodiments of the present invention, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a method or apparatus including a series of elements includes not only the explicitly recited elements but also other elements not explicitly listed or inherent to the method or apparatus. Without further limitation, the use of the phrase "including a. -. said." does not exclude the presence of other elements (e.g., steps in a method or elements in a device, such as portions of circuitry, processors, programs, software, etc.) in the method or device in which the element is included.
The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, e.g., U and/or W, which may mean: u exists alone, U and W exist simultaneously, and W exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of U, W, V, and may mean including any one or more elements selected from the group consisting of U, W and V.
With the development of information technology, the optical transmission technology can realize high-speed, high-capacity, low-delay and low-noise transmission of digital signals. In a Dense Wavelength Division Multiplexing (DWDM) system, as the amount of information rapidly expands, the number of channels that need to be added to and dropped from an uplink increases rapidly, and changes in the number of channels, optical power switching, passive loss changes, and the like all cause changes in the input optical power of EDFAs, thereby generating a transient effect. The overall performance of a system with multiple EDFAs present on a transmission line can be severely affected if the fluctuations in input optical power cannot be effectively controlled and compensated for.
In the related art, because the optical amplifier adopts a set of hardware and a control scheme, the problems that the response speed of an actual input/output shift circuit and a sampling circuit to different incident light powers is different, a passive device has a nonlinear effect on the wide wavelength gain flatness, the transmission delay of an optical signal in a module and the response speed of a control circuit are not timely and the like exist, and the control mode of the equipment and the actual system parameters can be not completely compatible together. Transient suppression in wide gain and wide wavelength ranges cannot be achieved for systems with different channel configuration rates and different gain ranges.
Fig. 1 is a schematic diagram of a structure of an EDFA according to an embodiment of the present application, and as shown in fig. 1, the EDFA may at least include: an Optical input port 101, a fiber coupler 102, an Optical isolator 103, a pump laser 104, an Optical Photodetector (PD) 105, an Optical Photodetector 106, an erbium-doped fiber 107, a Variable Optical Attenuator (VOA) 108, an Optical output port 109, and a control unit 110. The control unit 110 is connected to the pump laser 104, the incident photodetector 105, and the emergent photodetector 106, respectively, to obtain a power value of the incident light signal, a power value of the emergent light signal, and a performance parameter of the pump laser, and determines a control signal (a driving current value of the current pump laser) according to the obtained power value of the incident light signal, the obtained power value of the emergent light signal, and the performance parameter of the pump laser, so as to drive the pump laser, so that the output power of the pump laser is reduced by the transient effect.
In order to solve the above technical problem, in some embodiments of the present application, a transient suppression control method is proposed.
Fig. 2 is a flowchart of a transient suppression control method according to an embodiment of the present application, and as shown in fig. 2, the flowchart may include:
step S201: determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; wherein the first control parameter value is used for adjusting the drive current value of the pump laser.
Here, the power value of the current desired output signal of the optical fiber amplifier may represent a power value of the desired output signal corresponding to the power value of the current optical signal. The current desired output power value needs to remove the influence of the current Amplified Spontaneous Emission (ASE) power, that is, the difference between the current desired output power value and the ASE power is determined as the power value of the current desired output signal. The first control parameter values may include at least: the value of the scaling factor P and the value of the integration factor I.
In one embodiment, step S201 includes: and determining a first control parameter value of the optical fiber amplifier according to the obtained magnitude relation between the power value of the current expected output signal of the optical fiber amplifier and the obtained power value of the expected output signal at the previous moment.
In one example, step S201 further includes: and determining the power value of the current expected output signal of the optical fiber amplifier according to the power value of the current optical signal of the optical fiber amplifier.
In some possible embodiments, determining the power value of the currently desired output signal of the optical fiber amplifier according to the power value of the currently incoming optical signal of the optical fiber amplifier includes: and determining the power value of the first expected output signal according to the real-time gain value of the current EDFA, the power value of the current incoming optical signal and the unit stepping gain value. Here, the unit gain value represents the minimum step gain unit for performing gain stepping.
Step S202: and under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value.
Here, the first preset correction parameter value may include a first proportional correction parameter value corresponding to the value of the proportional factor P and a first integral correction parameter value corresponding to the value of the integral factor I. The first proportional correction parameter value corresponding to the value of the proportional factor P and the first integral correction parameter value corresponding to the value of the integral factor I are correction parameter values determined when the power value of the incoming optical signal instantaneously rises. In one example, the first preset correction parameter value may be set by the upper computer according to the user's needs.
In one possible implementation, step S202 includes: determining the sum of the value of the scaling factor P and the first proportional correction parameter value as a corrected third scaling factor value; determining the sum of the value of the integral factor I and the first integral correction parameter value as a corrected third integral factor value; and determining the third proportional factor value and the third integral factor value as a second control parameter value of the optical fiber amplifier.
In a possible implementation, step S202 further includes: the controller detects that the power value of the incident light signal changes, and determines that the power value of the incident light signal rises instantaneously when the change condition of the power value of the incident light signal meets a preset first change condition.
In one example, when the controller detects that the power value of the incoming optical signal changes and the change condition of the power value of the incoming optical signal satisfies a preset first change condition, determining that the power value of the incoming optical signal rises instantaneously to obtain the state of the drop transient identification signal includes: acquiring a first edge slope value, wherein the first edge slope value is determined according to power values of at least 2 incident light signals within a first preset time; and determining that the power value of the incident light signal is instantaneously increased under the condition that the first edge slope value is greater than a preset increasing wave rising threshold value and the wave dropping transient flag signal is invalid.
In a possible implementation, step S202 further includes: acquiring gear information of a sampling circuit of the incident light signal; and determining that the power value of the incident light signal rises instantaneously when the gear information is changed from a high-level gear to a low-level gear.
Step S203: and carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal.
In one possible implementation, step S203 includes: according to the instant when the power value of the current optical signal is subjected to transient change, determining a previous instant from a previous instant set when the power value of the optical signal is not subjected to transient change, and determining the power value of the outgoing optical signal at the previous instant as the power value of the delayed outgoing optical signal. For example, the instant when the power value of the incoming optical signal changes transiently may be the instant t5, and the set of previous instants when the power value of the incoming optical signal does not change transiently may be the instants t4, t3, t2, t1, and t0, so that one previous instant t3 may be arbitrarily selected to determine the power value of the outgoing optical signal at the instant t3 as the power value of the delayed outgoing optical signal.
Step S204: and determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal.
In one possible implementation, step S204 includes: determining a first feedback control output signal value according to the power value of the current expected output signal, the power value of the delayed light-emitting signal and the second control parameter value; and determining the sum of the first feedback control output signal value and the feedforward compensation output signal value corresponding to the acquired incident light signal as a first driving current value of the pump laser.
Here, the determining a value of the first feedback control output signal according to the power value of the current expected output signal, the power value of the delayed optical signal, and the second control parameter value includes: and inputting the power value of the current expected output signal and the power value of the delayed light-emitting signal into a PID controller with the control parameter value as a second control parameter value, and obtaining a first feedback control output signal value through the PID controller.
Step S205: driving the pump laser at the first drive current value.
In one embodiment, step S205 includes: the output power of the pump laser is controlled by sending the first drive current value as a control current to the pump laser.
In practical applications, the steps S201 to S205 can be implemented by a control Unit in the EDFA, and the control Unit can be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), an FPGA, a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor.
In the embodiment of the present application, the first driving current value of the pump laser is determined according to the power value of the current expected output signal, the power value of the delayed light output signal, the second control parameter value, and the feedforward compensation output signal value corresponding to the current light input signal, the second control parameter value is determined according to the first control parameter value and the first preset correction parameter value, and the first control parameter value is determined according to the power value of the current expected output signal, so that the first driving current value of the pump laser is determined according to the second control parameter value, so that transient suppression in a wide gain and wide wavelength range can be achieved for systems with different channel configuration rates and different gain ranges.
In some embodiments, the present application further provides a transient suppression control method, including:
step S301: determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the drive current value of the pump laser.
Step S302: and under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value.
Step S303: and carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal.
Step S304: and determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal.
Step S305: driving the pump laser at the first drive current value.
Step S306: and under the condition that the power value of the optical signal is determined to be instantaneously dropped, determining a third control parameter value of the optical fiber amplifier according to the first control parameter value and a second preset correction parameter value.
Here, the second preset correction parameter value may include a second proportional correction parameter value corresponding to the value of the proportional factor P and a second integral correction parameter value corresponding to the value of the integral factor I. The second proportional correction parameter value corresponding to the value of the proportional factor P and the second integral correction parameter value corresponding to the value of the integral factor I are correction parameter values determined when the power value of the incident light signal instantaneously falls. In one example, the second preset correction parameter value may be set by the upper computer according to the user's needs.
In one possible implementation, step S306 includes: determining the sum of the value of the scaling factor P and the value of the second proportional correction parameter as a corrected fourth scaling factor value; determining the sum of the value of the integral factor I and the second integral correction parameter value as a corrected fourth integral factor value; and determining the fourth proportional factor value and the fourth integral factor value as a third control parameter value of the optical fiber amplifier.
In a possible implementation, step S306 further includes: and when the controller detects that the power value of the incident light signal changes and the change condition of the power value of the incident light signal meets a preset second change condition, determining that the power value of the incident light signal instantaneously falls.
In one example, when the controller detects that the power value of the incoming optical signal changes and the change condition of the power value of the incoming optical signal satisfies a preset second change condition, determining that the power value of the incoming optical signal drops instantaneously, the method includes: acquiring the state of the wave-dropping transient identification signal; acquiring a second edge slope value, wherein the second edge slope value is determined according to the power values of at least 2 incident light signals in a second preset time; and determining that the power value of the incident light signal instantaneously falls under the condition that the second edge slope value is greater than a preset wave falling threshold value and the wave-increasing transient flag signal is invalid.
In a possible implementation, step S306 further includes: acquiring gear information of a sampling circuit of the incident light signal; and determining that the power value of the incident light signal falls instantaneously when the gear information is changed from a low-level gear to a high-level gear.
Step S307: and carrying out time delay processing on the power value of the current incident optical signal to obtain the power value of the time-delayed incident optical signal.
In one possible embodiment, step 309 includes: according to the instant when the power value of the current optical signal is subjected to transient change, determining a previous instant from a previous instant set when the power value of the optical signal is not subjected to transient change, and determining the power value of the optical signal at the previous instant as the power value of the delayed optical signal. Here, the instant when the power value of the optical signal changes transiently may be the instant t5, and the set of previous instants when the power value of the optical signal does not change transiently may be the instants t4, t3, t2, t1, and t0, so that one previous instant t3 may be arbitrarily selected to determine the power value of the optical signal at the instant t3 as the power value of the delayed optical signal.
Step S308: and determining the power value of the first expected output signal according to the power value of the delayed light-in signal.
Here, the power value of the first desired output signal may be a power value of the desired output signal corresponding to the power value of the delayed optical signal.
In one example, step S308 includes: and determining the power value of the first expected output signal according to the real-time gain value of the current EDFA, the power value of the delayed incoming optical signal and the unit stepping gain value. Here, the unit gain value represents the minimum step gain unit for performing gain stepping.
Step S309: and determining a second driving current value of the pump laser according to the power value of the first expected output signal, the power value of the current outgoing optical signal, the third control parameter value and a feedforward compensation output signal value corresponding to the incoming optical signal.
In one possible implementation, step S309 includes: determining a second feedback control output signal value according to the power value of the first expected output signal, the power value of the current light-emitting signal and a third control parameter value; and determining the sum of the second feedback control output signal value and the feedforward compensation output signal value corresponding to the acquired incident light signal as a second driving current value of the pump laser.
Here, the determining a value of the second feedback control output signal according to the power value of the first expected output signal, the power value of the current optical signal and the third control parameter value includes: and inputting the power value of the first expected output signal and the power value of the current emergent light signal into a PID controller with the control parameter value as a third control parameter value, and obtaining a second feedback control output signal value through the PID controller.
In some embodiments, the present application further proposes a transient suppression control method, the method comprising the steps of:
step S401: and acquiring the power value of the expected output signal at the previous moment.
Here, the previous time represents a sampling time immediately before the current time.
Step S402: and determining the difference between the power value of the current expected output signal and the power value of the expected output signal at the previous moment as the power change value of the current expected output signal.
Step S403: and under the condition that the power change value of the current expected output signal is a positive number, obtaining a first multiple relation by dividing the power change value of the current expected output signal by a first preset power change threshold value.
Step S404: and determining a first control parameter value of the optical fiber amplifier according to the first multiple relation.
In some possible embodiments, step S404 includes: and determining a first control parameter value according to the first multiple relation and a preset first correction rule.
Step S405: and under the condition that the power change value of the current expected output signal is negative, dividing the absolute value of the power change value of the current expected output signal by a second preset power change threshold value to obtain a second multiplier relation.
Step S406: determining a first control parameter value of the optical fiber amplifier according to the second multiplier relation; the first control parameter value is used for adjusting the drive current value of the pump laser.
In some possible embodiments, step S404 includes: and determining the first control parameter value according to the second multiplier relation and a preset second correction rule.
Step S407: the first control parameter value comprises a value of a scaling factor P and a value of an integration factor I.
Step S408: the first preset correction parameter value includes a first proportional correction parameter value corresponding to the value of the proportional factor P and a first integral correction parameter value corresponding to the integral factor I.
Step S409: the second preset correction parameter value comprises a second proportional correction parameter value corresponding to the value of the proportional factor P and a second integral correction parameter value corresponding to the integral factor I.
Step S410: and under the condition that the power value of the optical signal is determined to be instantaneously increased, determining the sum of the value of the scaling factor P and the first proportional correction parameter value as a corrected third scaling factor value.
Step S412: determining a sum of the value of the integration factor I and the first integrated correction parameter value as a corrected third integration factor value.
Step S413: determining the third value of the proportional factor and the third value of the integral factor as a second control parameter value of the optical fiber amplifier.
Step S414: and carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal.
Step S415: and determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal.
Step S416: driving the pump laser at the first drive current value.
In some embodiments, the present application further proposes a transient suppression control method, the method comprising the steps of:
step S501: and acquiring the power value of the expected output signal at the previous moment.
Step S502: and determining the difference between the power value of the current expected output signal and the power value of the expected output signal at the previous moment as the power change value of the current expected output signal.
Step S503: and under the condition that the power change value of the current expected output signal is a positive number, obtaining a first multiple relation by dividing the power change value of the current expected output signal by a first preset power change threshold value.
Step S504: and removing the remainder of the first multiple relation to obtain a first integer multiple N, wherein N is an integer greater than or equal to 1.
In one example, step S504 includes: when the first multiple relationship is 1.4, the remainder 4 is removed, resulting in a first integer multiple of 1.
Step S505: and reducing the value of the scaling factor P by N times to obtain a corrected first scaling factor value, wherein the first control parameter value comprises the value of the scaling factor P.
In one example, step S505 includes: and reducing the value of the current scale factor P by 1 time to obtain a corrected first scale factor value of 0.5P.
Step S506: determining the modified first scale factor value as a first control parameter value for the fiber amplifier.
Step S507: and under the condition that the power change value of the current expected output signal is negative, dividing the absolute value of the power change value of the current expected output signal by a second preset power change threshold value to obtain a second multiplier relation.
Step S508: and removing the remainder of the second multiplier relation to obtain a second integer multiple M, wherein M is an integer greater than or equal to 1.
In some possible embodiments, step S508 includes: when the second multiplier relationship is 2.4, the remainder 4 is removed to obtain a second integer multiple of 2.
Step S509: and amplifying the value of the scaling factor P to M times to obtain a corrected second scaling factor value.
In some embodiments, step S509 includes: and amplifying the value of the scaling factor P to 2 times to obtain a corrected second scaling factor value 2P.
Step S510: and determining the corrected second scale factor value as a first control parameter value of the optical fiber amplifier, wherein the first control parameter value is used for adjusting the driving current value of the pump laser.
Step S511: and under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value.
Step S512: and carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal.
Step S513: and determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal.
Step S514: driving the pump laser at the first drive current value.
Step S515: and under the condition that the power value of the optical signal is determined to have instantaneous drop, the second preset correction parameter value comprises a second proportional correction parameter value corresponding to the value of the proportional factor P and a second integral correction parameter value corresponding to the integral factor I.
Step S516: and determining the sum of the value of the scaling factor P and the second proportional correction parameter value as a corrected fourth scaling factor value.
Step S517: determining a sum of the value of the integration factor I and the second integrated correction parameter value as a corrected fourth integration factor value.
Step S518: determining the fourth value of the proportionality factor and the fourth value of the integral factor as a third control parameter value of the optical fiber amplifier.
Step S519: and carrying out time delay processing on the power value of the current incident optical signal to obtain the power value of the time-delayed incident optical signal.
Step S520: and determining the power value of the first expected output signal according to the power value of the delayed light-in signal.
Step S521: and determining a second driving current value of the pump laser according to the power value of the first expected output signal, the power value of the current outgoing optical signal, the third control parameter value and the feedforward compensation output signal value corresponding to the incoming optical signal.
In some embodiments, the present application provides a transient suppression control method, including:
step S601: determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the drive current value of the pump laser.
Step S602: and under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value.
Step S603: and carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal.
Step S604: and determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal.
Step S605: driving the pump laser at the first drive current value.
Step S606: and determining the state of the instantaneous rise of the power value of the incident light signal as the incident light transient rise state.
Step S607: and determining the state of the instantaneous drop of the power value of the incident light signal as the incident light transient drop state.
Step S608: and determining the duration of the light incidence transient rising state or the light incidence transient falling state as transient change time.
Step S609: determining the difference between the preset system time and the transient change time as the time when no transient change occurs;
step S610: and determining the current driving current value of the pump laser according to the power value of the current expected output signal, the power value of the current outgoing optical signal, the first control parameter value and the obtained feedforward compensation output signal value corresponding to the incoming optical signal within the non-transient change time.
In one possible example, step S610 includes: determining a third feedback control output signal value according to the power value of the current expected output signal, the power value of the current emergent signal and the first control parameter value; and determining the sum of the third feedback control output signal value and the obtained feedforward compensation output signal value corresponding to the incident light signal as a third driving current value of the pump laser.
Here, determining a third feedback control output signal value according to the power value of the current desired output signal, the power value of the current outgoing optical signal, and the first control parameter value includes: and inputting the power value of the current expected output signal and the power value of the current emergent signal into a PID controller with the control parameter value as a first control parameter value, and obtaining a third feedback control output signal value through the PID controller.
In some embodiments, an EDFA transient suppression control method is provided, which performs sampling and holding by using incoming/outgoing light Y-level information, filters circuit sampling noise, modifies a proportional factor P and an integral factor I controlled by a PID according to incoming light transient change, optimizes transient characteristics, has high portability, supports multi-parameter configurability, and is compatible with various requirements.
The method comprises the following steps:
step S701: PD probe power scaling, which includes power scaling for each pump, power scaling for VOAs, power scaling for ASE, etc.
Step S702: the feed-forward algorithm calibration needs to be performed according to gain, power of each pump under different input optical power under the current gain is determined, then a curve is fitted, and corresponding parameters in a dac (dac) formula are determined.
Here, mw denotes the mw value corresponding to the power of different input optical signals, the unit of the power of the input optical signals is dBm, and dac denotes the pump laser driving value corresponding to the output power of each pump laser; gain represents the target gain value.
Step S703: the method comprises the steps of converting an incident light signal of an optical fiber amplifier into an incident light voltage signal (Vin), sampling the Vin by an Analog-to-Digital Converter (ADC), obtaining a data magnitude of the Vin, converting the data magnitude of the Vin into a Power value (Power _ in) of the incident light signal, and monitoring the Power _ in real time. The method comprises the steps of converting an outgoing optical signal of an optical fiber amplifier into an outgoing optical voltage signal (Vout), then carrying out ADC sampling on the Vout to obtain a data magnitude of the outgoing optical voltage signal, and converting the data magnitude of the outgoing optical voltage signal into a Power value (Power _ out) of the outgoing optical signal.
Step S704: and judging whether the Power _ in has transient change, namely, the incident light rises instantaneously or falls instantaneously. Caching Power _ in, calculating the edge slope K of the incident light signal, comparing the edge slope K of the incident light signal with the threshold of the instantaneous rising of the incident light or the threshold of the instantaneous falling of the incident light, and judging whether the instantaneous rising of the incident light occurs to the incident light add wave transient mark (addshot _ flag) or the instantaneous falling of the incident light occurs to the incident light falling wave transient mark (undersshot _ flag) is effective or not;
step S705: and judging Y gear information of the incident light sampling circuit, and if the gear monitoring module judges that the falling edge of the incident light Y gear information is effective, enabling incident light to generate wave-increasing transient rise, namely, addshot _ flag is effective. If the gear monitoring module judges that the rising edge of the incident light Y gear information is effective, the incident light falls off in a wave-falling transient state, namely the undershoot _ flag is effective.
If the gear monitoring module judges that the falling edge of the light-in Y gear information is effective or the falling edge of the light-out gear information is effective, the input PD or the output PD respectively carries out corresponding delay filtering according to the Y gear wave-increasing and gear-shifting delay parameter of the input PD or the output PD, the sampling value of the input PD or the output PD is kept locked and unchanged in the delay time, and then the data magnitude of Vin is converted into Power _ in or the data magnitude of Vout is converted into Power _ out. If the gear monitoring module judges that the rising edge of the light-in Y gear information is effective or the rising edge of the light-out gear information is effective, the input PD or the output PD respectively carries out corresponding delay filtering according to the Y gear wave-dropping gear-shifting delay parameter of the input PD or the output PD, the sampling value of the input PD or the output PD is kept locked and unchanged in the delay time, and then the data magnitude of Vin is converted into the Power value Power _ in of the light-in signal or the data magnitude of Vout is converted into the Power value Power _ out of the light-out signal.
Step S706: if the transient identification module judges that the addshot _ flag is valid, delaying the Power _ out according to the wave-increasing delay parameter (Ouput _ dly) to obtain the Power value (Power _ out') of the delayed emergent light signal. If the transient identification module judges that the undersshoot _ flag is valid, delaying the Power _ in according to the wave-dropping delay parameter (Input _ dly) to obtain the Power value (Power _ in') of the delayed incident light signal.
And if the addshot _ flag is valid, calculating expected output Power (Power _ out _ exp) and Power _ out 'according to the Power _ in, and sending the expected output Power (Power _ out _ exp) and the Power _ out' to the PID module for closed-loop control. And if the undersshoot _ flag is valid, calculating expected output Power (Power _ out _ exp ') and Power _ out according to the Power _ in ', and sending the expected output Power (Power _ out _ exp ') and the Power _ out to the PID module for closed-loop control.
Step S707: when the expected output power is increased by 3dB, the proportional factor P of the PID feedback control loop is reduced by one time to obtain a corrected proportional factor P'; for every 3dB reduction in the desired output power, the scale factor P of the PID feedback control loop is doubled to obtain a modified scale factor P'. If the transient identification module judges that the addshot _ flag is valid, the proportional factor P of the PID module is increased by delta P1 on the basis of the original adjustment, and the integral factor I is increased by delta I1 on the basis of the original adjustment. If the transient identification module judges that the undersshoot _ flag is valid, the proportional factor P of the PID module is increased by delta P2 on the basis of the original adjustment, and the integral factor I is increased by delta I2 on the basis of the original adjustment.
During a period of time T1(Tsys > T1, Tsys is system light edge time) when addshot _ flag or undershoot _ flag is continuously effective, Δ Px + P and Δ Ix + I (x is 1 or x is 2) are fed to the PID feedback control loop to continuously act, and when Tsys-T1 time or light has no transient change, the proportional factor P of the PID feedback control loop is corrected by every 3dB change of expected output power and updated to the proportional factor P', and the integral factor I is determined by the configuration of an upper computer.
Step S708: the feedforward compensation output signal (FF _ dac) and the PID module output signal (PID _ out _ dac) are added, and as a result FF _ PID _ out _ dac effects control of the pump laser drive current.
Fig. 3 is a schematic flow chart of obtaining the power value of the incident light signal and the power value of the emergent light signal based on the incident light or emergent light Y shift change according to the embodiment of the present application, as shown in fig. 3, the flow chart includes the following steps:
step S30: and obtaining an incident light Y-gear ADC sampling value and an emergent light Y-gear ADC sampling value.
Here, when the falling edge of the light-in Y position information is valid or the falling edge of the light-out Y position information is valid, the process proceeds to step S31; when the falling edge of the light-in Y-position information is valid or the falling edge of the light-out Y-position information is valid, step S34 is performed.
In one example, the incoming and outgoing Y-level ADC samples may be monitored by the control unit.
Step S31: and determining that the falling edge of the incident light Y-position information is effective or the falling edge of the emergent light Y-position information is effective.
Step S32: and the light-in or light-out sampling circuit carries out Y-gear wave-increasing and gear-shifting delay.
Step S33: obtain Power _ in or Power _ out.
Step S34: and determining that the rising edge of the incident light Y-position information is effective or the rising edge of the emergent light Y-position information is effective.
Step S35: and the incident light or emergent light sampling circuit carries out Y-gear wave dropping and gear shifting delay.
Here, after the completion step S35 is performed, the flow proceeds to step S33.
Fig. 4 is a flowchart illustrating delay of power values of an incoming optical signal and an outgoing optical signal according to an embodiment of the present application, where as shown in fig. 4, the flowchart includes the following steps:
step S40: and monitoring whether the incident light signal changes transiently or not.
Here, in the case where it is determined that the instantaneous rise of the light entrance signal occurs, the process proceeds to step S41, and in the case where it is determined that the instantaneous fall of the light entrance signal occurs, the process proceeds to step S43.
Step S41: it is determined that a momentary rise in the incoming light signal has occurred.
Step S42: delayed Power _ out'.
Step S43: it is determined that the incident light signal instantaneously falls.
Step S44: delayed Power _ out'.
FIG. 5 is a diagram illustrating the changes of the proportional factor P and the integral factor I of the PID control in the transient state according to the embodiment of the present application; as shown in fig. 5, when the power value of the incoming optical signal is instantaneously increased, the input of the PID controller includes: power _ out _ exp, Power _ out', a corrected proportional control factor P + delta Px and an integral control factor I + delta Ix; when the power value of the incident light signal is instantaneously dropped, the input of the PID controller comprises: power _ out _ exp', Power _ out, modified proportional control factor P + Δ Px, and integral control factor I + Δ Ix.
When the instantaneous rise or fall of the incident light is determined, the proportional control factor P and the integral control factor I are corrected to obtain a corrected proportional control factor P + Δ Px and a corrected integral control factor I + Δ Ix, wherein x is 1 or 2.
Fig. 6A is a schematic diagram of a waveform-increasing transient state when the minimum gain G is 10, 19dB dynamic according to an embodiment of the present application; fig. 6B is a schematic diagram of a wave-dropping transient state in a dynamic state of 19dB with a minimum gain G of 10; fig. 6C is a schematic diagram of a wave-amplifying transient state when the maximum gain G is 22, 19dB dynamic according to an embodiment of the present application; fig. 6D is a schematic diagram of a wave-dropping transient state when the maximum gain G is 22 and 19dB dynamic according to an embodiment of the present application. In fig. 6A, 6B, 6C, and 6D, the abscissa represents time, and the ordinate represents voltage amplitude, each of fig. 6A, 6B, 6C, and 6D includes upper and lower two curves, in which the periods of voltage amplitude steady state 610, 612, 620, 622, 630, 632, 640, and 642 in the upper curves 61 to 64 represent voltage amplitudes for which transient suppression has not been performed, and the periods of voltage amplitude transient change 611, 621, 631, and 641 in the upper curves 61 to 64 represent voltage amplitudes for which transient suppression processing has been performed; the time periods of the voltage amplitude plateaus of 650, 652, 660, 662, 670, 672, 680 and 682 in the lower curves 65 to 68 represent voltage amplitudes in which no change in the incident light power occurs, and the time periods of the voltage amplitude transient changes of 651, 661, 671 and 681 in the lower curves 65 to 68 represent voltage amplitude transient rises or falls. It can be seen that transient changes can be quickly and effectively suppressed by the transient suppression control method provided by the embodiment of the application.
Fig. 7 is a schematic structural diagram of a transient suppression control device according to an embodiment of the present application, and as shown in fig. 7, the transient suppression control device may include: a first control parameter determining module 701, a second control parameter determining module 702, a delay processing module 703, a first driving current value determining module 704, and a driving module 705, wherein,
the first control parameter determining module 701 is configured to determine a first control parameter value of the optical fiber amplifier according to the obtained power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser;
the second control parameter determining module 702 is configured to determine a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value when it is determined that the power value of the optical signal is increased instantaneously;
the delay processing module 703 is configured to perform delay processing on the power value of the current outgoing optical signal to obtain a power value of the delayed outgoing optical signal; the power value of the delayed light-emitting signal represents the power value of the light-emitting signal at a first target moment; the first target time is determined from a previous time set that the power value of the incoming optical signal is not subjected to transient change according to the time when the power value of the current incoming optical signal is subjected to transient change;
the first driving current value determining module 704 is configured to determine a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed optical signal, the second control parameter value, and the obtained feedforward compensation output signal value corresponding to the optical signal;
the driving module 705 is configured to drive the pump laser with the first driving current value.
In one embodiment, the apparatus comprises: a third control parameter determining module 706, a power value obtaining module 707 of the delayed incoming optical signal, a power value determining module 708 of the first desired output signal, and a second driving current value determining module 709, wherein,
the third control parameter determining module 706 is configured to determine a third control parameter value of the optical fiber amplifier according to the first control parameter value and the second preset correction parameter value when it is determined that the power value of the optical signal falls instantaneously.
The power value obtaining module 707 of the delayed incoming optical signal is configured to perform delay processing on the power value of the current incoming optical signal to obtain the power value of the delayed incoming optical signal.
The power value determining module 708 of the first expected output signal is configured to determine the power value of the first expected output signal according to the power value of the delayed optical signal.
The second driving current value determining module 709 is configured to determine a second driving current value of the pump laser according to the power value of the first expected output signal, the power value of the current outgoing optical signal, the third control parameter value, and a feedforward compensation output signal value corresponding to the incoming optical signal.
In one embodiment, the first control parameter determining module 701 is configured to obtain a desired output power at a previous time; determining the difference between the power value of the current expected output signal and the power value of the expected output signal at the previous moment as the power change value of the current expected output signal; under the condition that the power change value of the current expected output signal is a positive number, obtaining a first multiple relation by dividing the power change value of the current expected output signal by a first preset power change threshold value; determining a first control parameter value of the optical fiber amplifier according to the first multiple relation; under the condition that the power change value of the current expected output signal is negative, a second multiplier relation is obtained by dividing the absolute value of the power change value of the current expected output signal by a second preset power change threshold value; and determining a first control parameter value of the optical fiber amplifier according to the second multiplier relation.
In one embodiment, the first control parameter value includes a value of a scaling factor P, and the first control parameter determining module 701 is configured to remove a remainder of the first multiple relation to obtain a first integer multiple N, where N is an integer greater than or equal to 1; reducing the value of the scaling factor P by N times to obtain a corrected first scaling factor value; determining the corrected first scale factor value as a first control parameter value of the optical fiber amplifier; removing the remainder of the second multiplier relation to obtain a second integer multiple M, wherein M is an integer greater than or equal to 1; amplifying the value of the scaling factor P by M times to obtain a corrected second scaling factor value; determining the modified second scale factor value as a first control parameter value for the fiber amplifier.
In one embodiment, the first control parameter value comprises a value of a scaling factor P and a value of an integration factor I; the first preset correction parameter value comprises a first proportional correction parameter value corresponding to the value of the proportional factor P and a first integral correction parameter value corresponding to the integral factor I; the second preset correction parameter value comprises a second proportional correction parameter value corresponding to the value of the proportional factor P and a second integral correction parameter value corresponding to the integral factor I.
In one embodiment, the second control parameter determining module 702 is configured to determine a sum of the value of the scaling factor P and the first proportional correction parameter value as a corrected third scaling factor value; determining the sum of the value of the integral factor I and the first integral correction parameter value as a corrected third integral factor value; determining the third value of the proportional factor and the third value of the integral factor as a second control parameter value of the optical fiber amplifier.
In one embodiment, the third control parameter determining module 706 is configured to determine a sum of the value of the scaling factor P and the second scaled correction parameter value as a corrected fourth scaling factor value; determining the sum of the value of the integral factor I and the second integral correction parameter value as a corrected fourth integral factor value; determining the fourth value of the proportionality factor and the fourth value of the integral factor as a third control parameter value of the optical fiber amplifier.
In one embodiment, the state of the instantaneous rise of the power value of the incident light signal is determined as the incident light transient rise state; determining the instantaneous falling state of the power value of the incident light signal as an incident light transient falling state; the device further comprises: a transient change non-occurrence time pump laser driving current value determining module 710, configured to determine a duration of the incident light transient rising state or the incident light transient falling state as a transient change time; determining the difference between the preset system time and the transient change time as the time when no transient change occurs; and determining the current driving current value of the pump laser according to the power value of the current expected output signal, the power value of the current outgoing optical signal, the first control parameter value and the obtained feedforward compensation output signal value corresponding to the incoming optical signal within the non-transient change time.
In practical applications, the first control parameter determining module 701, the second control parameter determining module 702, the delay processing module 703, the first driving current value determining module 704, the driving module 705, the third control parameter determining module 706, the power value obtaining module 707 of the delayed incoming optical signal, the power value determining module 708 of the first desired output signal, the second driving current value determining module 709, and the driving current value determining module 710 of the pump laser at the time when no transient change occurs may be implemented by using a control unit in an EDFA, where the control unit may be at least one of an ASIC, a DSP, a DSPD, a PLD, an FPGA, a CPU, a controller, a microcontroller, and a microprocessor.
In addition, each functional module in this embodiment may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Generally, computer program instructions corresponding to a transient suppression control method in the present embodiment may be stored on a storage medium such as an optical disc, a hard disc, or a usb disk, and when the computer program instructions corresponding to a transient suppression control method in the storage medium are read or executed by an electronic device, any one of the transient suppression control methods in the foregoing embodiments is implemented.
In some embodiments, functions of or modules included in the apparatus provided in the embodiments of the present application may be used to perform the method described in the above method embodiments, and the implementation thereof may refer to the description of the above method embodiments, and for brevity, will not be described again here.
The foregoing description of the various embodiments is intended to highlight various differences between the embodiments, and the same or similar parts may be referred to each other, and for brevity, will not be described again herein.
The methods disclosed in the method embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in various product embodiments provided by the application can be combined arbitrarily to obtain new product embodiments without conflict.
The features disclosed in the various method or apparatus embodiments provided herein may be combined in any combination to arrive at new method or apparatus embodiments without conflict.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, the present embodiments are not limited to the above-described embodiments, which are merely illustrative and not restrictive, and it will be apparent to those of ordinary skill in the art that many more modifications and variations can be made in the present embodiments without departing from the spirit of the disclosure and the scope of the appended claims.

Claims (11)

1. A transient suppression control method, comprising:
determining a first control parameter value of the optical fiber amplifier according to the acquired power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser;
under the condition that the power value of the optical signal is determined to be instantaneously increased, determining a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value;
carrying out time delay processing on the power value of the current emergent light signal to obtain the power value of the time-delayed emergent light signal; the power value of the delayed light-emitting signal represents the power value of the light-emitting signal at a first target moment; the first target time is determined from a previous time set that the power value of the incident optical signal is not subjected to transient change according to the time when the power value of the current incident optical signal is subjected to transient change;
determining a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed emergent light signal, the second control parameter value and the obtained feedforward compensation output signal value corresponding to the incident light signal;
driving the pump laser at the first drive current value.
2. The method of claim 1, further comprising:
under the condition that the power value of the incident light signal is determined to fall instantaneously, determining a third control parameter value of the optical fiber amplifier according to the first control parameter value and a second preset correction parameter value;
carrying out time delay processing on the power value of the current incident light signal to obtain the power value of the time-delayed incident light signal; the power value of the delayed light incidence signal represents the power value of the light incidence signal at a second target moment; the second target time is determined from a previous time set at which the power value of the incoming optical signal is not subjected to transient change according to the time at which the power value of the current incoming optical signal is subjected to transient change;
determining a power value of a first expected output signal according to the power value of the delayed incoming optical signal;
and determining a second driving current value of the pump laser according to the power value of the first expected output signal, the power value of the current outgoing optical signal, the third control parameter value and the feedforward compensation output signal value corresponding to the incoming optical signal.
3. The method of claim 1, wherein determining the first control parameter of the optical fiber amplifier according to the obtained power value of the currently expected output signal of the optical fiber amplifier comprises:
acquiring the power value of an expected output signal at the previous moment;
determining the difference between the power value of the current expected output signal and the power value of the expected output signal at the previous moment as the power change value of the current expected output signal;
under the condition that the power change value of the current expected output signal is a positive number, obtaining a first multiple relation by dividing the power change value of the current expected output signal by a first preset power change threshold value;
determining a first control parameter value of the optical fiber amplifier according to the first multiple relation;
under the condition that the power change value of the current expected output signal is negative, a second multiplier relation is obtained by dividing the absolute value of the power change value of the current expected output signal by a second preset power change threshold value;
and determining a first control parameter value of the optical fiber amplifier according to the second multiplier relation.
4. The method of claim 3, wherein the first control parameter value comprises a value of a scaling factor P, and wherein determining the first control parameter value for the fiber amplifier based on the first multiplier relationship comprises:
removing the remainder of the first multiple relation to obtain a first integer multiple N, wherein N is an integer greater than or equal to 1;
reducing the value of the scaling factor P by N times to obtain a corrected first scaling factor value;
determining the corrected first scale factor value as a first control parameter value of the optical fiber amplifier;
said determining a first control parameter value for said fiber amplifier based on said second multiplier relationship comprises:
removing the remainder of the second multiplier relation to obtain a second integer multiple M, wherein M is an integer greater than or equal to 1;
amplifying the value of the scaling factor P by M times to obtain a corrected second scaling factor value;
determining the modified second scale factor value as a first control parameter value for the fiber amplifier.
5. The method of claim 2, wherein the first control parameter value comprises a value of a scaling factor P and a value of an integration factor I;
the first preset correction parameter value comprises a first proportional correction parameter value corresponding to the value of the proportional factor P and a first integral correction parameter value corresponding to the integral factor I;
the second preset correction parameter value comprises a second proportional correction parameter value corresponding to the value of the proportional factor P and a second integral correction parameter value corresponding to the integral factor I.
6. The method of claim 5, wherein determining a second control parameter value for the fiber amplifier based on the first control parameter value and a first preset correction parameter value comprises:
determining the sum of the value of the scaling factor P and the first proportional correction parameter value as a corrected third scaling factor value;
determining the sum of the value of the integral factor I and the first integral correction parameter value as a corrected third integral factor value;
determining the third value of the proportional factor and the third value of the integral factor as a second control parameter value of the optical fiber amplifier.
7. The method of claim 5, wherein said determining a third control parameter value for the fiber amplifier from the first control parameter value and a second preset correction parameter value comprises:
determining the sum of the value of the scaling factor P and the second proportional correction parameter value as a corrected fourth scaling factor value;
determining the sum of the value of the integral factor I and the second integral correction parameter value as a corrected fourth integral factor value;
determining the fourth value of the proportionality factor and the fourth value of the integral factor as a third control parameter value of the optical fiber amplifier.
8. The method according to any one of claims 1 to 6, further comprising:
determining the state of the instantaneous rise of the power value of the incident light signal as an incident light transient rise state;
determining the state of the power value of the incident light signal in instantaneous falling as an incident light transient falling state;
determining the duration of the incident light transient rising state or the incident light transient falling state as transient change time;
determining the difference between the preset system time and the transient change time as the time when no transient change occurs;
and determining the current driving current value of the pump laser according to the power value of the current expected output signal, the power value of the current outgoing optical signal, the first control parameter value and the obtained feedforward compensation output signal value corresponding to the incoming optical signal within the non-transient change time.
9. A transient suppression control apparatus, characterized in that the apparatus comprises: a first control parameter determining module, a second control parameter determining module, a delay processing module, a first driving current value determining module and a driving module,
the first control parameter determining module is configured to determine a first control parameter value of the optical fiber amplifier according to the obtained power value of the current expected output signal of the optical fiber amplifier; the first control parameter value is used for adjusting the driving current value of the pump laser;
the second control parameter determining module is configured to determine a second control parameter value of the optical fiber amplifier according to the first control parameter value and a first preset correction parameter value when the power value of the optical signal is determined to have an instantaneous increase;
the delay processing module is used for carrying out delay processing on the power value of the current emergent light signal to obtain the power value of the delayed emergent light signal; the power value of the delayed light-emitting signal represents the power value of the light-emitting signal at a first target moment; the first target time is determined from a previous time set that the power value of the optical signal is not subjected to transient change according to the time when the power value of the optical signal is subjected to transient change at present;
the first driving current value determining module is configured to determine a first driving current value of the pump laser according to the power value of the current expected output signal, the power value of the delayed outgoing optical signal, the second control parameter value, and the obtained feedforward compensation output signal value corresponding to the incoming optical signal;
the driving module is used for driving the pump laser by the first driving current value.
10. An optical fiber amplifier, comprising: a memory and a processor;
the memory to store executable instructions;
the processor, when executing the executable instructions stored in the memory, implements the transient suppression control method of any of claims 1 to 7.
11. A computer-readable storage medium storing executable instructions for implementing the transient suppression control method of any one of claims 1 to 6 when executed by a processor.
CN202010763453.5A 2020-07-31 2020-07-31 Transient suppression control method and device, optical fiber amplifier and readable storage medium Active CN111917481B (en)

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