WO2016192430A1

WO2016192430A1 - Burst optical signal amplification control method and apparatus, and burst optical signal amplification system

Info

Publication number: WO2016192430A1
Application number: PCT/CN2016/076072
Authority: WO
Inventors: 操日祥
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-06-01
Filing date: 2016-03-10
Publication date: 2016-12-08
Also published as: CN106301579A; CN106301579B

Abstract

Disclosed are a burst optical signal amplification control method and apparatus, and a burst optical signal amplification system. The method comprises: acquiring a first input optical signal, wherein the first input optical signal comprises an optical signal which does not pass through a time delayer; determining a time delay duration and a first feedback value of the first input optical signal according to the first input optical signal, wherein the first feedback value comprises a current value output by a pump in an optical amplifier when a second input optical signal passes through the optical amplifier, the time delay duration comprises a duration from a start moment when the first input optical signal is timed to the time when the pump outputs a current, and the second input optical signal comprises an optical signal which has passed through the time delayer; and at the end moment of the time delay duration, the pump adopting the first feedback value to perform optical amplification processing on the second input optical signal, so as to obtain an optical amplification output signal.

Description

Burst optical signal amplification control method, device and burst optical signal amplification system

Technical field

This application relates to, but is not limited to, communication technology.

Background technique

With the development of network technology, a large number of voice, data, video and other services can be transmitted through optical fibers. At the same time, in order to improve the efficiency of optical network transmission, an optical switching system and an optical passive access network (optical passive switching network) consisting of optical packet switching (OPS) or optical burst switching (OBS) technologies (Optical passive) Network, PON for short, is being used more and more widely.

1 is a schematic structural diagram of an optical amplifier of the related art. As shown in FIG. 1 , in the related art, an input optical signal is split into two sub-input optical signals by a second optical splitter, that is, a first sub-input light entering the photodetector PD2. a signal, and a second sub-input optical signal entering the rare earth doped amplifier, wherein the second sub-input optical signal first merges with the different wavelengths of light from the pump pump, merges in the combiner WDM, and then enters the rare earth doped medium together The second sub-input optical signal is amplified, and finally, the amplified second sub-input optical signal is obtained after entering the third optical splitter, and is divided into two sub-output optical signals, that is, the first sub-output light entering the photodetector PD3. The signal, and the second sub-output optical signal that is directly output. The optical amplifier control module includes a system information acquisition module, a feedforward processing module, a clock module, a system control module, and a feedforward processing module to control the system.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Since the burst optical signal has a long period of no-light idle interval, and the amplitude of the different burst optical signals varies greatly, each different portion of the burst optical signal after passing through the amplifier may experience different gains, thereby generating signal distortion. And cause a higher bit error rate.

This paper provides a burst optical signal amplification control method, device and burst optical signal amplification system. System to solve the problem of high bit error rate.

A burst optical signal amplification control method includes:

Acquiring a first input optical signal, the first input optical signal comprising an optical signal before passing through the delay device;

Determining, according to the first input optical signal, a delay duration of the first input optical signal and a first feedback value, the first feedback value including a second input optical signal passing through the optical amplifier when the optical amplifier is in the pump a current value of the output, the delay duration comprising a duration from a start time of the first input optical signal to the pump output current, the second input optical signal including light passing through the delay signal;

At the end of the delay duration, the pump performs optical amplification processing on the second input optical signal by using the first feedback value to obtain an optical amplification output signal.

Optionally, before determining the delay duration and the first value of the first input optical signal according to the first input optical signal, the method further includes:

Determining, according to the first input optical signal, whether the power of the first input optical signal is within a range of a first threshold and a second threshold, the first threshold being less than the second threshold;

If not, performing, in the first working mode, determining, according to the first input optical signal, a delay duration and a first value of the first input optical signal, where the first working mode includes a constant current a mode of operation or other mode that controls the output optical power of the pump to be constant;

If yes, performing, in the second working mode, determining, according to the first input optical signal, a delay duration and a first feedback value for the first input optical signal, where the second working mode includes constant gain operation Mode or constant current mode of operation.

Optionally, after the determining, according to the first input optical signal, determining the delay duration and the first value of the first input optical signal, the method further includes:

Determining a second value of the amplifier according to a power difference between the optical amplification output signal and the target optical signal, the second value including the pumping when the second input optical signal passes the optical amplifier next time Output current value.

Optionally, after the acquiring the first input optical signal, the method further includes:

Comparing the first input optical signal with the last first input optical signal to determine the first Whether a power difference between an input optical signal and a last first input optical signal is greater than a third threshold;

If yes, returning to perform determining, according to the first input optical signal, a delay duration and a first feedback value for the first input optical signal;

If not, the current state of the system is maintained, and the operation in the second working mode is continued.

Optionally, the pumping of the optical amplifier performs optical amplification processing on the second input optical signal by using a first value after the end of the delay duration, and after obtaining the optical amplified output signal, the method further includes:

Comparing the optical amplified output signal with a fourth threshold to determine whether the power of the output optical signal is greater than the fourth threshold;

If it is greater than, it returns to the initialization state of the system;

If less than, the current working mode is executed, and the current working mode includes the first working mode or the second working mode.

Optionally, determining, according to the first input optical signal, a delay duration and a first value of the first input optical signal, including:

Determining the delay duration and the first feedback value according to the first input optical signal by using any one of a BP neural network algorithm, a conventional look-up table method, or a polynomial fitting method.

Optionally, the determining, by using a BP neural network algorithm, the delay duration and the first value according to the first input optical signal, including:

And determining the delay duration and the first feed according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the last output.

A burst optical signal amplification control device includes:

Obtaining a module, configured to: acquire a first input optical signal, where the first input optical signal includes an optical signal before passing through the delay device;

Determining a module, configured to: determine, according to the first input optical signal, a delay duration and a first feedback value of the first input optical signal, where the first input value includes when the second input optical signal passes through the optical amplifier a current value of the pump output in the optical amplifier, the delay duration comprising a duration from a start time of the first input optical signal to the pump output current, the second input optical signal packet Including the optical signal after passing through the delay device;

The amplifying module is configured to: at an end time of the delay duration, control the pump to perform optical amplification processing on the second input optical signal by using the first feed value to obtain an optical amplified output signal.

Optionally, the determining module is further configured to: determine, according to the first input optical signal, whether a power of the first input optical signal is within a range of a first threshold and a second threshold, the first threshold Less than the second threshold; if not, performing the determining, according to the first input optical signal, a delay duration and a first feedback value of the first input optical signal in the first working mode, The first mode of operation includes a constant current mode of operation or other mode that controls the output optical power of the pump to be constant; if so, performing the first input optical signal in the second mode of operation to determine the first input The delay time of the optical signal and the first feedback value, and the second operation mode includes a constant gain operation mode or a constant current operation mode.

Optionally, the determining module is further configured to: determine, according to a power difference between the optical amplified output signal and the target optical signal, a second value of the amplifier, where the second value includes a next second The pumped output current value as the input optical signal passes through the optical amplifier.

Optionally, the determining module is further configured to: compare the first input optical signal with the last first input optical signal, and determine between the first input optical signal and the last first input optical signal. Whether the power difference is greater than the third threshold; if yes, returning to perform determining the delay duration and the first value of the first input optical signal according to the first input optical signal; if not, maintaining the current system The state is unchanged, and the operation in the second working mode is continued.

Optionally, the determining module is further configured to: compare the optical amplified output signal with a fourth threshold, determine whether the power of the output optical signal is greater than the fourth threshold; if greater, return to the system An initialization state; if less than, executing a current working mode, the current working mode including the first working mode or the second working mode.

Optionally, the determining module is further configured to: determine, according to the first input optical signal, a delay time duration by using any one of a BP neural network algorithm, a traditional look-up table method, or a polynomial fitting method. And the first feed value.

Optionally, the determining module is configured to: determine the extension according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the last output. The duration and the first value.

A burst optical signal amplifying system includes: an optical amplifying controller, a delayer and an optical amplifier, wherein the delayer is connected to the optical amplifier,

The delay device is configured to: perform a delay processing of the first input optical signal for a delay time duration, and output a second input optical signal;

The optical amplifying controller is respectively connected to the delay device and the optical amplifier, and configured to: determine the delay time and the first time for the first input optical signal according to the first input optical signal And a first value that includes a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, the delay duration including a start time of the first input optical signal The length of time to which the pump outputs current;

The optical amplifier is configured to perform optical amplification processing on the second input optical signal by using the first feed value at an end time of the delay duration to obtain an optical amplification output signal.

Optionally, the optical amplification controller is further configured to: determine, according to the first input optical signal, whether a power of the first input optical signal is within a range of a first threshold and a second threshold, where a threshold is less than the second threshold; if not, performing the determining, according to the first input optical signal, a delay duration and a first feedback value of the first input optical signal in a first working mode, The first mode of operation includes a constant current mode of operation or other mode that controls the output optical power of the pump to be constant; if so, performing the determining according to the first input optical signal in the second mode of operation a delay time of the input optical signal and a first feedback mode, the second operational mode comprising a constant gain operation mode or a constant current operation mode.

Optionally, the optical amplification controller is further configured to: determine, according to a power difference between the optical amplification output signal and the target optical signal, a second value of the amplifier, where the second value includes the next time The pumped output current value as the second input optical signal passes through the optical amplifier.

Optionally, the optical amplification controller is further configured to: compare the first input optical signal with the last first input optical signal, and determine the first input optical signal and the last first input optical signal. Whether the power difference between the power is greater than the third threshold; if yes, returning to perform determining the delay time and the first value of the first input optical signal according to the first input optical signal; if not, maintaining The current state of the system remains unchanged, and the operation in the second working mode is continued.

Optionally, the optical amplification controller is further configured to: compare the optical amplification output signal with a fourth threshold, determine whether the power of the output optical signal is greater than the fourth threshold; if greater than, return The initialization state to the system; if less than, the current working mode is executed, and the current working mode includes the first working mode or the second working mode.

Optionally, the optical amplification controller is further configured to: determine, according to the first input optical signal, any one of a BP neural network algorithm, a traditional look-up table method, or a polynomial fitting method to determine the delay The duration and the first value.

Optionally, the optical amplification controller is configured to: determine the extension according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the previous output. The duration and the first value.

Optionally, the method further includes: an optical burst amplifying signal receiver, wherein the optical burst amplifying signal receiver is connected to the optical amplifier;

The optical burst amplifying signal receiver includes: a filter;

The filter is configured to perform filtering processing on the optical amplified output signal.

Optionally, the optical burst amplification signal receiver further includes: a photoelectric converter and a sudden transimpedance amplifier, wherein the photoelectric converter is connected to the sudden transimpedance amplifier, and the photoelectric converter is connected to the optical amplifier The burst transimpedance amplifier is coupled to the filter;

The photoelectric converter is configured to: convert the optical amplified output signal from an optical signal into a current signal;

The burst transimpedance amplifier is configured to: amplify and convert a current signal output by the photoelectric converter into a voltage signal.

A computer readable storage medium storing computer executable instructions for performing the method of any of the above.

Compared with the related art, the embodiment of the present invention includes acquiring a first input optical signal, where the first input optical signal includes an optical signal before passing through the delay device, and determining, according to the first input optical signal, the first Inputting a delay duration of the optical signal and a first feedback value, the first feedback value including a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, the delay duration including a duration of the first input optical signal timing to a duration of the pump output current, the second input optical signal comprising an optical signal after passing the delay; at an end of the delay duration, The pump performs optical amplification processing on the second input optical signal by using the first feed value to obtain an optical amplified output signal. The delay of the first input optical signal is performed, and the extended duration can be used for accurately calculating the first feedback value. Further, the control of the pump output current in the optical amplifier reduces the distortion of the optical signal. And reduce the occurrence of bit error rate.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a schematic structural view of an optical amplifier of the related art;

2 is a schematic flow chart of an embodiment of a burst optical signal amplification control method according to the present invention;

3 is a schematic structural diagram of an embodiment of a burst optical signal amplification control apparatus according to the present invention;

4 is a schematic structural diagram of an embodiment of a burst optical signal amplifying system according to the present invention;

5 is a schematic structural diagram of a second embodiment of a burst optical signal amplifying system according to the present invention;

6 is a schematic structural diagram of three embodiments of a burst optical signal amplifying system according to the present invention;

7 is a schematic structural diagram of a filter of an embodiment of a burst optical signal amplifying system according to the present invention;

FIG. 8 is a schematic diagram of a frequency response curve of a filter according to an embodiment of a burst optical signal amplifying system of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

The burst optical signal amplification control method provided by the embodiment of the present invention can be applied to an optical switching system. Or when the optical signal is amplified in the optical passive access network. The burst optical signal amplification control method provided in this embodiment may be performed by a burst optical signal amplification control device, which may be integrated in the optical amplification controller or separately set, wherein the burst The optical signal amplification control device can be implemented in a software and/or hardware manner. The burst optical signal amplification control method and apparatus and the burst optical signal amplification system provided in this embodiment will be described in detail below.

2 is a schematic flowchart of an embodiment of a method for amplifying a burst optical signal according to an embodiment of the present invention. As shown in FIG. 2, the execution body of the method of the present embodiment may be a burst optical signal amplification control device. The method comprises the following steps:

Step 201: Acquire a first input optical signal.

In this embodiment, the first input optical signal may include an optical signal before passing through the delay device;

Step 202: Determine, according to the first input optical signal, a delay duration and a first feedback value of the first input optical signal.

In this embodiment, the first feedback value includes a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, and the delay duration includes time counting the first input optical signal. a time from the start of the time to the pump output current, the second input optical signal comprising an optical signal after passing through the delay;

Step 203: At the end time of the delay duration, the pump performs optical amplification processing on the second input optical signal by using the first feed value to obtain an optical amplification output signal.

After the delay of the delay time duration, the first input optical signal is subjected to a delay of the delay time, and then enters the optical amplifier for optical amplification processing, and finally the optical burst signal output, that is, the optical amplification output signal is obtained. In this embodiment, since the time from the moment when the feedforward event is triggered to the time when the feedforward is applied is controllable, and the time is longer, the application of the feedforward can be performed accurately, and the conventional light is The feedforward application of the amplifier always lags behind the change of the signal, and in order to ensure the timeliness of the feedforward application, the feedforward calculation generally needs to be as simple and fast as possible, and the accuracy cannot meet the burst optical signal amplification requirement.

In this embodiment, the first input optical signal is acquired, the first input optical signal includes an optical signal before passing through the delay device; and the extension of the first input optical signal is determined according to the first input optical signal. a time duration and a first value, the first feedback value including the second input optical signal passing through the optical amplifier And a current value of the pump output in the optical amplifier, the delay duration includes a duration from a start time of the first input optical signal to the pump output current, and the second input optical signal includes An optical signal after the delay device; at the end time of the delay time period, the pump performs optical amplification processing on the second input optical signal by using the first feedback value to obtain an optical amplification output signal. The delay of the first input optical signal is performed, and the extended duration can be used for accurately calculating the first feedback value. Further, the control of the pump output current in the optical amplifier reduces the distortion of the optical signal. And reduce the occurrence of bit error rate.

On the basis of the foregoing embodiment, before the determining the delay time and the first value of the first input optical signal according to the first input optical signal, the method may further include:

On the basis of the foregoing embodiment, after performing the determining the delay time and the first value of the first input optical signal according to the first input optical signal in the second working mode, the method further includes:

Comparing the first input optical signal with the last first input optical signal to determine whether a difference between the first input optical signal and the last first input optical signal is greater than a third threshold;

If not, keep the current state of the system unchanged, and continue to perform the operation in the second working mode. Work.

On the basis of the above embodiment, at the end of the delay time period, the pump of the optical amplifier performs optical amplification processing on the second input optical signal by using the first feedback value, and after obtaining the optical amplified output signal, :

If it is greater than, it returns to the initialization state of the system;

Determining the delay duration and the first value of the first input optical signal according to the first input optical signal may include:

The determining, by the BP neural network algorithm, the delay duration and the first feed value according to the first input optical signal, including:

3 is a schematic structural diagram of an embodiment of a burst optical signal amplification control apparatus according to the present invention. As shown in FIG. 3, the apparatus of this embodiment may include: an obtaining module 31, a determining module 32, and an amplifying module 33, where

The obtaining module 31 is configured to: acquire a first input optical signal, where the first input optical signal includes an optical signal before passing through the delay device;

The determining module 32 is configured to: determine, according to the first input optical signal, a delay duration and a first feedback value for the first input optical signal, where the first input value includes the second input optical signal through the optical amplifier And a current value of the pump output in the optical amplifier, the delay duration includes a duration from a start time of the first input optical signal to the pump output current, and the second input optical signal includes Passing the optical signal after the delay;

The amplification module 33 is configured to: control the pump to be adopted at an end time of the delay duration The first input value optically amplifies the second input optical signal to obtain an optical amplified output signal.

In this embodiment, the first input optical signal is acquired, the first input optical signal includes an optical signal before passing through the delay device; and the extension of the first input optical signal is determined according to the first input optical signal. a duration and a first value, the first value comprising a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, the delay duration comprising the first input optical signal a timing of the timing of the pump output current, the second input optical signal comprising an optical signal after passing through the delay; at the end of the delay duration, the pump adopts the The second input optical signal is optically amplified by a feed to obtain an optically amplified output signal. The delay of the first input optical signal is performed, and the extended duration can be used for accurately calculating the first feedback value. Further, the control of the pump output current in the optical amplifier reduces the distortion of the optical signal. And reduce the occurrence of bit error rate.

The determining module is further configured to: determine, according to the first input optical signal, whether the power of the first input optical signal is within a range of a first threshold and a second threshold, where the first threshold is smaller than the first a second threshold; if not, performing, in the first working mode, determining, according to the first input optical signal, a delay duration and a first value of the first input optical signal, the first working mode Included in a constant current mode of operation or other mode that controls the output optical power of the pump to be constant; if so, performing the derivation of the first input optical signal based on the first input optical signal in the second operational mode The duration of time and the first value of the second operating mode include a constant gain mode of operation or a constant current mode of operation.

On the basis of the foregoing embodiment, the determining module 32 is further configured to: determine, according to a power difference between the optical amplified output signal and the target optical signal, a second value of the amplifier, the second value Including the output current value of the pump when the second input optical signal passes through the optical amplifier.

On the basis of the foregoing embodiment, the determining module 32 is further configured to: compare the first input optical signal with the last first input optical signal, determine the first input optical signal and the first time Whether the difference between the input optical signals is greater than a third threshold; if yes, returning to perform determining a delay duration and a first feedback value for the first input optical signal according to the first input optical signal; if not, Then, the current state of the system is kept unchanged, and the operation in the second working mode is continued.

On the basis of the foregoing embodiment, the determining module 32 is further configured to: compare the optical amplified output signal with a fourth threshold, and determine whether the power of the output optical signal is greater than the fourth threshold; Returning to the initialization state of the system; if less, executing the current working mode, the current working mode including the first working mode or the second working mode.

On the basis of the foregoing embodiment, the determining module 32 is further configured to: determine, according to the first input optical signal, any one of a BP neural network algorithm, a traditional table lookup method, or a polynomial fitting method. The delay duration and the first feedback value.

On the basis of the foregoing embodiment, the determining module is configured to: determine, according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the previous output. The delay time and the first value are described.

4 is a schematic structural diagram of an embodiment of a burst optical signal amplifying system according to the present invention. As shown in FIG. 4, the system of this embodiment may include: an optical amplifying controller 41, a delayer 42 and an optical amplifier 43, the delay The device 42 is connected to the optical amplifier 43

The delay device 42 is configured to: perform a delay processing of the first input optical signal for a delay time duration, and output a second input optical signal;

For example, the delay device may be an optical fiber having a length greater than 20 meters or an optical waveguide capable of delaying the propagation of the optical signal, and the burst optical signal may cause a delay of more than 100 nanoseconds. Time.

The optical amplification controller 41 is respectively connected to the delayer 42 and the optical amplifier 43 and configured to: determine the delay time of the first input optical signal according to the first input optical signal And a first value, the first value includes a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, the delay duration including timing the first input optical signal The time from the start of the moment to the pump output current.

For example, after the delay of the delay time duration is performed by the first input optical signal through a delay device, the optical amplifier is further subjected to optical amplification processing, and finally the optical burst signal output, that is, the optical amplification output signal is obtained. In this embodiment, since the time from the moment when the feedforward event is triggered to the time when the feedforward is applied is controllable, and the time is longer, the application of the feedforward can be performed accurately, and the conventional light is The amplifier feedforward application always lags behind the signal change, while ensuring the feedforward application Timeliness, feedforward calculations generally need to be as simple and fast as possible, and the accuracy cannot meet the burst optical signal amplification requirements.

The optical amplifier 43 is configured to perform optical amplification processing on the second input optical signal by using the first feedback value at an end time of the delay duration to obtain an optical amplification output signal.

FIG. 5 is a schematic structural diagram of a second embodiment of a burst optical signal amplifying system according to the present invention. As shown in FIG. 5, based on the foregoing embodiment, the system of this embodiment may further include: an optical amplifier controller and a first optical splitter. a first photodetector PD1, a delayer, a second photodetector, a second beam splitter, a combiner WDM, a pump, a rare earth doping medium, a third photodetector PD3, and a third beam splitter.

Wherein, the first input optical signal passes through the first optical splitter and is divided into two parts, a part of the optical signal enters the first photodetector PD1, and the other part passes through a delay device, and then enters the second optical splitter, and is further divided into two parts. One part enters the second photodetector PD2, and another part of the burst signal merges with the different wavelengths of light from the pump in the combiner WDM and enters the rare earth doped medium together, the burst optical signal is amplified, and then enters the third splitter , divided into 2 parts, part into the third photodetector PD3, another part of the output, optical amplifier controller control and interaction with the system, including system information acquisition module, feedforward processing module, clock module, system control module, feedforward Processing module. Here, the bandwidth of PD1 is greater than 100MHz, and the response time is about 200ns~1us, which can be determined according to different application scenarios and the gain saturation and gain recovery time of the rare earth doped medium used. Taking the application scenario of TWDM PON system and erbium-doped fiber as an example, 300 ns is more suitable, and it can be realized by oversampling and multiple acquisition and averaging. The bandwidth of PD2 and PD3 should be greater than 10MHz. The time should be about 1us, which can be achieved by oversampling and multiple acquisition and averaging. The delay device can be a length of 20m ~ 10km fiber or a length of any optical waveguide capable of delaying the propagation of the optical signal, resulting in a delay of about 100ns ~ 50us. It can be seen that the first beam splitter, the photodetector PD1, the delayer, or an integrated device of any combination of their functions is also an embodiment of the present invention, and the optical burst delay unit composed of them is characterized by a burst The optical signal through it will cause a delay and the power of the burst optical signal can be detected before the delay. The rare earth doped medium can be an erbium doped fiber or any other rare earth doped medium.

On the basis of the above embodiment, the optical amplification controller is further configured to: determine, according to the first input optical signal, whether the power of the first input optical signal is within a range of a first threshold and a second threshold, Determining that the first threshold is smaller than the second threshold; if not, performing the determining, according to the first input optical signal, the delay duration and the first feed of the first input optical signal in the first working mode a value, the first mode of operation comprising a constant current mode of operation or other mode that controls the output optical power of the pump to be constant; if so, performing the determining according to the first input optical signal in a constant gain mode of operation The delay time of the first input optical signal and the first feedback value, and the second operation mode includes a constant gain operation mode or a constant current operation mode.

On the basis of the above embodiment, the optical amplification controller is further configured to: determine a second value of the amplifier according to a power difference between the optical amplification output signal and the target optical signal, the second feed The value includes the value of the pumped output current for the next time the second input optical signal passes through the optical amplifier.

Optionally, based on the foregoing embodiment, the optical amplification controller is further configured to: compare the first input optical signal with a previous first input optical signal, and determine the first input optical signal. Whether the power difference between the last input optical signal and the last time is greater than a third threshold; if yes, returning to perform determining, according to the first input optical signal, a delay duration and a first time for the first input optical signal The value is fed; if not, the current state of the system is maintained, and the operation in the second working mode is continued.

On the basis of the above embodiment, the optical amplification controller is further configured to: compare the optical amplification output signal with a fourth threshold, and determine whether the power of the output optical signal is greater than the fourth threshold; If it is greater than, it returns to the initialization state of the system; if it is less than, the current working mode is executed, and the current working mode includes the first working mode or the second working mode.

Optionally, based on the foregoing embodiment, the optical amplification controller is further configured to: adopt any one of a BP neural network algorithm, a traditional look-up table method, or a polynomial fitting method according to the first input optical signal. A device determining the delay duration and the first feedback.

The optical amplification controller is configured to: determine the delay duration and the location according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the previous output. The first value is described.

FIG. 6 is a schematic structural diagram of a third embodiment of a burst optical signal amplifying system according to the present invention. As shown in FIG. 6, according to the foregoing embodiment, an optical burst amplifying signal receiver, the optical burst amplifying signal may be further included. A receiver is coupled to the optical amplifier, wherein the optical burst amplifying signal receiver may include a filter 61, a photoelectric converter 62, a burst transimpedance amplifier 63, and a limiting amplifier 64 connected in sequence.

The filter 61 is configured to perform filtering processing on the optical amplified output signal.

The photoelectric converter 62 is connected to the sudden transimpedance amplifier 63, the photoelectric converter 62 is connected to the optical amplifier 33, and the sudden transimpedance amplifier 63 is connected to the filter 61, the filtering The unit 61 is connected to the limiting amplifier 64.

The photoelectric converter 62 is configured to convert the optical amplified output signal from an optical signal into a current signal;

The burst transimpedance amplifier 63 is configured to: amplify and convert the current signal output by the photoelectric converter 62 into a voltage signal;

The limiting amplifier 64 is configured to amplify the voltage signal output by the burst transimpedance amplifier 63 to obtain a constant amplitude output voltage signal.

For example, the filter may be a high-pass filter having a cutoff frequency between 100 kHz and 20 MHz. When the signal frequency is greater than the cutoff frequency, the signal is allowed to pass. When the signal frequency is less than the cutoff frequency, the signal is blocked. by.

7 is a schematic structural diagram of a filter of an embodiment of a burst optical signal amplifying system according to the present invention; FIG. 8 is a schematic diagram of a frequency response curve of a filter according to an embodiment of the burst optical signal amplifying system of the present invention; A high-pass filter, which may be an RC circuit as shown in FIG. 7, having a frequency response curve as shown in FIG. 8, f0 between 100 kHz and 20 MHz, when the signal frequency f>f0 When the signal is allowed to pass, when the signal frequency f < f0, the signal is prevented from passing.

Since the amplified output optical signal outputted by the embodiment of the present invention is a slowly varying signal of a small gain swing, the optical amplified output signal passes through the photoelectric converter 62, and after entering the high-pass filter 61 after the sudden transimpedance amplifier 63, it is corrected. Wherein, after the second input optical signal passes through the optical amplifier, the output amplified optical signal is a slowly varying signal with a small gain swing. After high-pass filtering, the gradual change portion of the signal affecting the determination of the lower limiting amplifier has been removed. The limiting amplifier is used to maximize the original equal amplitude signal.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

The implementation of the invention realizes delaying and then amplifying the first input optical signal, and the extended duration can be used for accurate calculation of the first feedback value. Moreover, the control of the pump output current in the optical amplifier reduces the distortion of the optical signal and reduces the generation of the bit error rate.

Claims

A burst optical signal amplification control method includes:

Acquiring a first input optical signal, the first input optical signal comprising an optical signal before passing through the delay device;

Determining, according to the first input optical signal, a delay duration of the first input optical signal and a first feedback value, the first feedback value including a second input optical signal passing through the optical amplifier when the optical amplifier is in the pump a current value of the output, the delay duration comprising a duration from a start time of the first input optical signal to the pump output current, the second input optical signal including light passing through the delay signal;

At the end of the delay duration, the pump performs optical amplification processing on the second input optical signal by using the first feedback value to obtain an optical amplification output signal.
The method of claim 1, wherein the determining the delay duration and the first value of the first input optical signal according to the first input optical signal further comprises:

Determining, according to the first input optical signal, whether the power of the first input optical signal is within a range of a first threshold and a second threshold, the first threshold being less than the second threshold;

If not, performing, in the first working mode, determining, according to the first input optical signal, a delay duration and a first value of the first input optical signal, where the first working mode includes a constant current a mode of operation or other mode that controls the output optical power of the pump to be constant;

If yes, performing, in the second working mode, determining, according to the first input optical signal, a delay duration and a first feedback value for the first input optical signal, where the second working mode includes constant gain operation Mode or constant current mode of operation.
The method according to claim 2, wherein said performing said determining, according to said first input optical signal, a delay duration of said first input optical signal and said first feedback value in said second operational mode ,Also includes:

Determining a second value of the amplifier according to a power difference between the optical amplification output signal and the target optical signal, the second value including the pumping when the second input optical signal passes the optical amplifier next time Output current value.
The method of claim 3, wherein after the obtaining the first input optical signal, the method further comprises:

Comparing the first input optical signal with the last first input optical signal to determine whether a power difference between the first input optical signal and the last first input optical signal is greater than a third threshold;

If yes, returning to perform determining, according to the first input optical signal, a delay duration and a first feedback value for the first input optical signal;

If not, the current state of the system is maintained, and the operation in the second working mode is continued.
The method according to any one of claims 2 to 4, wherein, at the end time of the delay time period, the pumping of the optical amplifier performs optical amplification processing on the second input optical signal by using a first value to obtain After the optical output signal is amplified, it also includes:

Comparing the optical amplified output signal with a fourth threshold to determine whether the power of the output optical signal is greater than the fourth threshold;

If it is greater than, it returns to the initialization state of the system;

If less than, the current working mode is executed, and the current working mode includes the first working mode or the second working mode.
The method according to claim 5, wherein the determining the delay duration and the first value of the first input optical signal according to the first input optical signal comprises:

Determining the delay duration and the first feedback value according to the first input optical signal by using any one of a BP neural network algorithm, a conventional look-up table method, or a polynomial fitting method.
The method according to claim 6, wherein the determining the delay duration and the first feedback by using a BP neural network algorithm according to the first input optical signal comprises:

And determining the delay duration and the first feed according to the first input optical signal power, the last first input optical signal power, the current temperature, and the first output of the last output.
A burst optical signal amplification control device includes:

Obtaining a module, configured to: acquire a first input optical signal, where the first input optical signal includes an optical signal before passing through the delay device;

Determining a module, configured to: determine, according to the first input optical signal, a delay duration and a first feedback value of the first input optical signal, where the first input value includes when the second input optical signal passes through the optical amplifier And a current value of the pump output in the optical amplifier, the delay duration includes a duration from a start time of the first input optical signal to the pump output current, and the second input optical signal includes The optical signal after the delayer;

The amplifying module is configured to: at an end time of the delay duration, control the pump to perform optical amplification processing on the second input optical signal by using the first feed value to obtain an optical amplified output signal.
A burst optical signal amplifying system includes: an optical amplifying controller, a delayer and an optical amplifier, wherein the delayer is connected to the optical amplifier,

The delay device is configured to: perform a delay processing of the first input optical signal for a delay time duration, and output a second input optical signal;

The optical amplifying controller is respectively connected to the delay device and the optical amplifier, and configured to: determine the delay time and the first time for the first input optical signal according to the first input optical signal And a first value that includes a current value of a pump output of the optical amplifier when the second input optical signal passes through the optical amplifier, the delay duration including a start time of the first input optical signal The length of time to which the pump outputs current;

The optical amplifier is configured to perform optical amplification processing on the second input optical signal by using the first feed value at an end time of the delay duration to obtain an optical amplification output signal.
The system according to claim 9, wherein the optical amplification controller is further configured to: determine, according to the first input optical signal, whether the power of the first input optical signal is at a first threshold and a second threshold The first threshold is smaller than the second threshold; if not, performing the determining, according to the first input optical signal, a delay to the first input optical signal in the first working mode a duration and a first value, the first mode of operation comprising a constant current mode of operation or other mode that controls the output optical power of the pump to be constant; if so, performing the first input light in the second mode of operation And determining a delay duration and a first feedback value for the first input optical signal, the second operational mode comprising a constant gain operation mode or a constant current operation mode.
The system according to claim 10, wherein said optical amplification controller is further configured to: determine said amplifier based on a power difference between said optically amplified output signal and a target optical signal a second value, the second value comprising an output current value of the pump when the second input optical signal passes through the optical amplifier.
The system according to claim 11, wherein the optical amplification controller is further configured to: compare the first input optical signal with a last first input optical signal, and determine the first input optical signal and Whether the difference between the first input optical signals is greater than the third threshold; if yes, returning to perform determining the delay duration and the first feedback value of the first input optical signal according to the first input optical signal If not, the current state of the system is maintained, and the operation in the second working mode is continued.
The system of claim 9 further comprising: an optical burst amplifying signal receiver, said optical burst amplifying signal receiver being coupled to said optical amplifier;

The optical burst amplifying signal receiver includes: a filter;

The filter is configured to perform filtering processing on the optical amplified output signal.
The system according to claim 13, wherein the optical burst amplifying signal receiver further comprises: a photoelectric converter and a sudden transimpedance amplifier, said photoelectric converter being connected to said burst transimpedance amplifier, said photoelectric conversion Connected to the optical amplifier, the sudden transimpedance amplifier is connected to the filter;

The photoelectric converter is configured to: convert the optical amplified output signal from an optical signal into a current signal;

The burst transimpedance amplifier is configured to: amplify and convert a current signal output by the photoelectric converter into a voltage signal.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-7.