CN105897341B - Optical amplifier transient inhibition quickly approaches device and method - Google Patents
Optical amplifier transient inhibition quickly approaches device and method Download PDFInfo
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- CN105897341B CN105897341B CN201610186785.5A CN201610186785A CN105897341B CN 105897341 B CN105897341 B CN 105897341B CN 201610186785 A CN201610186785 A CN 201610186785A CN 105897341 B CN105897341 B CN 105897341B
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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
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
- H04B10/296—Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2537—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to scattering processes, e.g. Raman or Brillouin scattering
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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
- H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
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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
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
- H04B10/2942—Signal power control in a multiwavelength system, e.g. gain equalisation using automatic gain control [AGC]
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Abstract
The present invention relates to a kind of inhibition of optical amplifier transient quickly to approach device and method, which has input terminal parallel sampling circuit, output end sample circuit, analog-digital converter, digital analog converter, pump laser, fifo controller and PID arithmetic module；Expand effective scope of detection using double ADC parallel samplings, when input light intensity changes, spliced by two-way ADC sampled datas, ensures that the data for computing module are really complete；By detecting input light amplitude of variation and output light intensity signal, PID compensation is made decisions, while obtaining the correction amount of PID integral terms.To realize that the transient response to different Add/drop Voice Channel rates can realize effectively inhibition in erbium-doped fiber amplifier (EDFA), the performance of EDFA is improved, ensures the reliable and stable of entire optical communication system.
Description
Technical field
The present invention relates to a kind of optic communication devices, and in particular to a kind of erbium-doped fiber amplifier (EDFA), more particularly to one
Kind can effectively inhibit the device and method of EDFA transient states in different rates light exchange process.
Background technology
In dwdm system, with the increase of portfolio, the channel quantity of upper and lower light path is needed also to gradually increase, and believed
The variation of road quantity leads to the variation of EDFA input optical powers, to generate transient effect.The transient effect of EDFA is to DWDM systems
System has important influence.Especially for cascade EDFAs, transient effect is by the operation for the system that significantly affects.In optical communication system
Often consider using EDFA as the node of a not no propagation delay time.The case where present channel allotment speed constantly upgrades
Under, think equipment sampling rate and speed control to accomplish can most there be best performance soon.But actual conditions are, due to
Image intensifer is using a set of hardware, a kind of control program, for (the i.e. transient state different time rise and fall of different channels configured rate
Edge) in the case of, transient state inhibition can not take into account.
Transient state is exchanged for ms magnitude light and inhibits good image intensifer, exchanging transient state inhibition to the light of us magnitudes does not have
Any effect.The light exchange of ms magnitudes has the mistuning of 1.5dB whole.Current each top EDFA equipment vendors are in 10us letters below
The mapping for optimizing EDFA in road rapid configuration magnitude, is arranged various technical thresholds, but actual effect can not meet and be
The different demands of system.
Problem derives from the electrical characteristic of input and output sample circuit, the time delay and controller that optical fiber transmits in the module
The speed of response of part causes the control mode of equipment and real system that can not exactly match jointly.
Invention content
In the case where us magnitude light exchanges transient response and is suppressed to close to physics limit, inside EDFA image intensifers
The electrical characteristic of existing propagation delay time, input and output sample circuit is inconsistent, and integral term when original stable state is established is inputting
Light can not re-establish rapidly in the case of changing, and causing light to exchange in transient process jointly has the owe punching of larger ms magnitudes to go out
It is existing.
In order to overcome the defect of existing control program, Fast Convergent can be accomplished for different rates optical switching network, this
Invention proposes a kind of control device for feedback compensation, including：Parallel sampling circuit is inputted, is adopted by using two-way AD
Sample expands effective sample area, has evaded sampled data caused by causing circuit shift since the amplitude of Add/drop Voice Channel is excessive
Maloperation caused by failure, and the digital signal that light intensity signal converts is passed into fifo controller.Fifo controller is by two-way
Sampled signal is filtered, is spliced into correct sample sequence, and feedforward output is controlled with this.Fifo controller is with correct simultaneously
Sample sequence generates the fifo queue that two sampling period clock intervals are m.Dedicated division calculation IP kernel, passes through ratio
Compared with the amplitude of input light variation, feedback control loop is decided whether to compensate, and feedback compensation is determined with the result that amplitude calculates
Size and Orientation.PID computing modules obtain the operation result of division calculation IP kernel, are modified to the pump drivings of EDFA.
The technical solution adopted by the present invention is：In the case where system input light intensity changes, by inputting light intensity amplitude
Variation and slope variation, compensate integral term item in feedback control, channel is with different rates configuration condition in realization system
Under, it is operated in the quick of Digital Control EDFA transient states inhibition in automatic gain locking operating mode and approaches.
For this purpose, the present invention provides a kind of inhibition of optical amplifier transient quickly to approach device, including：Input parallel sampling electricity
Road, input terminal analog-digital converter, output sample circuit, output end analog-digital converter, fifo controller, division arithmetic module, PID
Computing module；Wherein, the input parallel sampling circuit converts the light intensity signal for inputting image intensifer to input light strong voltage
Signal；The input optical intensity voltage signal is converted to input light intensity sampled data signal by the input terminal analog-digital converter；Institute
Fifo controller is stated by the input luminosity sampling before the input light intensity sampled data of present sample time and m sampling clock cycle
Data are delivered separately to first in first out data queue；The division arithmetic module reads number from the first in first out data queue
According to, by before and after m sampling clock cycle input light intensity change information pass to the PID arithmetic module；The output sampling
Circuit converts the light intensity signal exported from image intensifer to output intensity voltage signal；The output end analog-digital converter is by institute
It states output intensity voltage signal and is converted to output intensity sampled data signal；The PID arithmetic module is according to the input light intensity
Sampled data signal and the output intensity sampled data signal calculate pid control parameter to realize the closed loop feedback of image intensifer
Control, and the PID arithmetic module compensates the pid control parameter according to the change information of the input light intensity.
In the above-mentioned technical solutions, the input terminal analog-digital converter includes that first input end analog-digital converter and second are defeated
Enter and hold analog-digital converter, the input parallel sampling circuit believes the voltage of two-way and input image intensifer light intensity amplitude in proportion
Input first input end analog-digital converter and the second input terminal analog-digital converter number respectively, first input end analog-digital converter and the
Two input terminal analog-digital converters distinguish the voltage signal of alignment processing difference amplitude size, to expand the light of input image intensifer
Strong investigative range.
In the above-mentioned technical solutions, the pid control parameter is compensated including to the integral term in pid control parameter
It compensates.
In the above-mentioned technical solutions, the pid control parameter is compensated including the use of the differential in pid control parameter
Item is calculated and is compensated to the integral term in pid control parameter.
In the above-mentioned technical solutions, the fifo controller is a by the input light intensity sampled data and m of present sample time
Input light intensity sampled data before sampling clock cycle is spliced into Liang Ge first in first out data queue respectively in accordance with precedence, presses
It is (D1+ that sampling order, which produces the data sequence FIFO1 that a data structure is (D1, D2 ..., Dn) and a data structure,
M, D2+m ..., Dn+m) data sequence FIFO2, wherein D1 be current sample period input light intensity value, D1+m be m sample
Input light intensity value before clock cycle, the head data Dn of data sequence FIFO1 are the light intensity value before n sampling clock cycle, number
Head data Dn+m according to sequence FIFO2 is the light intensity value before n+m sampling period, and wherein m and n are positive integer and m>n>1.
In the above-mentioned technical solutions, judged whether pid control parameter compensates according to following judgment conditions：
Judgment condition 1：| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2) ＜ Δs D
Judgment condition 2：|(ΣFIFO1-ΣFIFO2)|/(ΣFIFO1+ΣFIFO2)≥ΔD
Wherein, Σ FIFO1 be data queue FIFO1's and value, Σ FIFO2 be data queue FIFO2's and value, Δ D is
Configurable proportionate relationship is represented after the fifo controller and the division arithmetic module secondary filtering, is detected
Input the light intensity amplitude of variation of image intensifer.
In the above-mentioned technical solutions, the integral term of pid control parameter is compensated according to following formula：
DFIFO=| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2)
PID=P*error0+D*error0+ΣI*error
Wherein, dFIFO is the result of calculation of division calculation module, represents the amplitude of input image intensifer light intensity variation, F
(dFIFO) function for being dFIFO, characterizes the compensation calculation of integral term in pid control parameter, and error is the gain of image intensifer
Error, error0For the gain error of present sample clock cycle, errornIt is that the gain that n-th of sampling clock cycle obtains misses
Difference, P, I, D are proportional, integral term, differential term in pid control parameter respectively.
In the above-mentioned technical solutions, the image intensifer is erbium-doped fiber amplifier, Raman Fiber Amplifier, hybrid fiber
Amplifier or high-power fiber amplifier.
The present invention also provides a kind of EDFA transient states to inhibit quick approach method, it is characterised in that including：Input light is put
The light intensity signal of big device is converted into input optical intensity voltage signal；The input optical intensity voltage signal is converted into input luminosity sampling
Data-signal；Pass through the input luminosity sampling before the input light intensity sampled data of present sample time and m sampling clock cycle
The change information of the front and back input light intensity of m sampling clock cycle is calculated in data；The light intensity signal that will be exported from image intensifer
It is converted into output intensity voltage signal；The output intensity voltage signal is converted into output intensity sampled data signal；According to
The input light intensity sampled data signal and the output intensity sampled data signal calculate pid control parameter to realize EDFA's
Closed loop feedback control, and the pid control parameter is compensated according to the change information of the input light intensity.
In the above-mentioned technical solutions, the pid control parameter is compensated including the use of the differential in pid control parameter
Item is calculated and is compensated to the integral term in pid control parameter.
The present invention achieves following technique effect：
The present invention accurately captures the variation of input light intensity, and the light by construction two and inputting EDFA using parallel sampling
The fifo queue of strong correlation, the time span that growth data compares reach the effect that secondary filtering is detected to input light intensity
Fruit, final amplitude or slope using light intensity variation, integral term is modified in calculating feedback, reaches channel not synchronized
The effect of equipment output energy immediate stability is configured under rate.
The present invention is realized that EDFA is in and is being increased automatically by the optimization design of the pid control algorithm to image intensifer pump
In benefit locking (AGC) control mode, inhibits the EDFA transient effects of all channel configuration rate light intensity situations of change, meet future
Transient state in all-optical network communication is controlled consumption, and is to believe due to being transmitted caused by Add/drop Voice Channel and intensity modulated in optical communication system
Number distortion provide solution.
Description of the drawings
Fig. 1 is that transient state inhibition quickly approaches apparatus structure block diagram
Fig. 2 is parallel sampling circuit, fifo controller, division arithmetic IP kernel work block diagram
Fig. 3 is that the inhibition of EDFA transient states quickly approaches device pump driving principle figures
It is marked in figure：Parallel sampling circuit 101, analog-digital converter ADC1 102, analog-digital converter ADC2 103, FIFO control
Device 104 processed, first in first out data queue FIFO1 105, first in first out data queue FIFO2 106, division arithmetic IP kernel 107,
Output sample circuit 108, analog-digital converter ADC3 109, PID arithmetic module 110, digital analog converter DAC 111, pumping 112,
Er-doped fiber EDF 113.
Attached drawing provides the explanation to specific implementation method of the present invention, explains the reality of the present invention jointly with specific embodiment
Application case does not constitute the limitation to apparatus of the present invention or method.
Specific implementation mode
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with the accompanying drawings and specific implementation mode
The present invention is described in further detail.
Existing light amplifier gain control loop has generally comprised (single channel) input sampling circuit, input terminal analog-to-digital conversion
Device, output sample circuit, output end analog-digital converter, operation control module, digital analog converter, pump light source.The input of EDFA
Light is converted into voltage signal by input sampling circuit, and the number for representing input light intensity magnitude is generated by input terminal analog-digital converter
Word amount；EDFA output lights are converted into voltage signal by exporting sample circuit, and are represented by the generation of output end analog-digital converter defeated
Go out the digital quantity of light intensity magnitude.The digital quantity for inputting light intensity and output intensity is inputted into operation control module, according to default
Yield value Gain, spontaneous radiation amount ASE is calculated jointly, and gain controls departure error, according to gain control deviation
Amount error obtains PID by proportional integral differential PID arithmetic and exports result of calculation, passes to digital-to-analogue converter, drives pump light
The laser in source generates pump light, realizes light amplification of the EDFA under gain loop control.But due to input sampling circuit and
The speed of response for the time delay and control device that the electrical characteristic difference and optical fiber of output sample circuit are transmitted in the module,
The control mode and real system for leading to this light amplifier gain control loop jointly can not exactly match, and can not take into account not
Transient state under cochannel configured rate is controlled consumption.
Transient state provided by the invention inhibits the control device for quickly approaching installation method for light amplifier gain loop, can
Transient state for erbium-doped fiber amplifier (EDFA) inhibits.Transient state inhibition quickly approaches device, as shown in Figure 1, including defeated
Enter parallel sampling circuit 101, analog-digital converter ADC1 102, analog-digital converter ADC2 103, fifo controller 104, advanced elder generation
Go out data queue FIFO1 105, first in first out data queue FIFO2 106, division arithmetic IP kernel 107 exports sample circuit
108, analog-digital converter ADC3 109, PID arithmetic module 110, digital analog converter DAC 111, pumping 112.
Wherein, input parallel sampling circuit 101 converts the light intensity signal for inputting erbium-doped fiber amplifier (EDFA) to electricity
Signal is pressed, the amplitude and the intensity of the optical signal of input EDFA of the voltage signal are in a linear relationship, transformed voltage signal point
Two-way distinguishes input analog-to-digital converter ADC1 102 and analog-digital converter ADC2 103, wherein the analog-digital converter ADC1 102
The electric signal of the different light intensity amplitude ranges of correspondence is converted into digital signal respectively with analog-digital converter ADC2 103, to expand
Light intensity detection range matches from input parallel sampling circuit 101 and ensures to configure in different input light intensity situations and optical channel
Under the conditions of, it can guarantee effective detection to inputting light intensity signal.Pass through analog-digital converter ADC1 102 and analog-digital converter
Two-way voltage signal is converted to two ways of digital signals and is output to fifo controller 104 by ADC2 103, will by fifo controller 104
PID arithmetic module 110 is passed to after digital signal splicing filtering after two-way analog-to-digital conversion；Meanwhile fifo controller 104 according to
The light intensity data of input is passed to first in first out data queue FIFO1 105, FIFO controls by the sampling time according to precedence
The sampled data of light intensity before m clock is passed to first in first out data queue FIFO2 106 by device 104, is transported by dedicated division
Calculate the benefit that IP kernel 107 calculates the integral term of PID arithmetic module 110 according to the variation for inputting EDFA light intensity before and after m sampling period
Coefficient is repaid, and the Strength Changes amplitude information of input light is passed into PID arithmetic module 110.
Output sample circuit 108 convert EDFA light intensity signals export to voltage signal, the amplitude of the voltage signal and
The intensity of the optical signal of EDFA outputs is in a linear relationship, and transformed voltage signal input analog-to-digital converter ADC3 109 will be defeated
For light extraction digital transfer to PID arithmetic module 110, PID arithmetic module 110 also carries out low-pass filtering simultaneously, removes circuit noise
Obtain smooth accurately Output optical power numerical value.
Fig. 2 is parallel sampling circuit 101, fifo controller 104, division arithmetic IP kernel 107 and advanced elder generation shown in FIG. 1
Go out the work block diagram of data queue FIFO1 105, first in first out data queue FIFO2 106.Parallel sampling circuit 101 is by sampling
Period samples the light intensity signal for inputting EDFA, is converted by analog-digital converter ADC1 102 and analog-digital converter ADC2 103
It is sent into fifo controller 104 for digital signal, which represents the light intensity value of each sampling instant input EDFA,
Fifo controller 104, to filter out the high-frequency noise in digital signal sequences, and is spliced by low-pass filtering by dedicated data
Processing, the sampled data of light intensity before the light intensity data of present sample time and m clock is spliced into respectively in accordance with precedence
Liang Ge first in first out data queue produces the data sequence that a data structure is (D1, D2 ..., Dn) by sampling order
FIFO1 and data structure is the data sequence FIFO2 of (D1+m, D2+m ..., Dn+m), and wherein D1 is current sample period
Light intensity value, D1+m is the light intensity value before m sampling period, before the head data Dn of data sequence FIFO1 is n sampling period
Light intensity value, the head data Dn+m of data sequence FIFO2 are the light intensity value before n+m sampling period, and wherein m and n are positive integer and m
>n>The concrete numerical value of 1, m and n integrates determination according to sampling rate and the transmission rate of the signal of input EDFA.Preferably, number
According to sequence FIFO1 by first in first out data queue FIFO1105 into row buffering, data sequence FIFO2 is by first in first out data queue
FIFO2106 carries out real-time update into row buffering, according to first in, first out mechanism.
Data sequence FIFO1 and data sequence FIFO2 input division arithmetics IP kernel 107 are subjected to operation to realize to input
The calculating of the accurate detection and light intensity amplitude variation numerical value of the variation of EDFA light intensity.By to the two data sequences FIFO's and value
The amplitude and trend of input light variation can be obtained by being compared, and the effect of smothing filtering can also be played by summing value itself
Fruit, the data for then being used for carrying out division arithmetic by division arithmetic IP kernel 107 are just relatively truer, and those skilled in the art should
It is appreciated that the two FIFO sequences can be compared to reality by extracting the signal of different periods in a fifo queue
It is existing.
Dedicated division arithmetic IP kernel 107, according to the following equation to whether Compensation Feedback output makes decisions：
Judgment condition 1：| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2) ＜ Δs D
Judgment condition 2：|(ΣFIFO1-ΣFIFO2)|/(ΣFIFO1+ΣFIFO2)≥ΔD
Wherein Σ FIFO1 be FIFO1 queues and value, Σ FIFO2 be FIFO2 queues and value, Δ D be can configure ratio
Example relationship, represents after 107 secondary filtering of fifo controller 104 and division arithmetic IP kernel, the light of the input EDFA detected
Strong amplitude of variation.
When the satisfaction of judgment condition 1, i.e., | (Σ FIFO1- Σ FIFO2) | when/(Σ FIFO1+ Σ FIFO2) ＜ Δ D, it is believed that defeated
Enter the stabilized intensity of EDFA, the integral term of PID arithmetic module 110 need not be compensated；
When the satisfaction of judgment condition 2, i.e., | (Σ FIFO1- Σ FIFO2) | when/(Σ FIFO1+ Σ FIFO2) >=Δ D, it is believed that defeated
The light intensity for entering EDFA changes, and original feedback control loop stable state has been destroyed, and needs the integral to PID arithmetic module 110
Item compensates.
That is, division arithmetic IP kernel 107 is obtained by the input light amplitude of variation and output light intensity signal that detect
It obtains input signal power amplitude of variation and slope, output signal power amplitude of variation or slope, gain change be finally calculated
Thus change amplitude or slope make decisions the compensation of the integral term of PID arithmetic module 110, while obtaining repairing for PID integral terms
Positive quantity.
In equipment working state, first in, first out data queue FIFO1105 and first in, first out data queue FIFO2106 and specially
Division arithmetic IP kernel 107, according to first in, first out mechanism real-time update.
Fig. 3 is that the progress pump drivings of pump drive modules 301 that the inhibition of EDFA transient states quickly approaches in device are realized quickly
Convergent structure diagram, the pump drive modules 301 in 308 composition Fig. 3 of PID arithmetic module 110 and Pump drivings in Fig. 1,
After fifo controller 104 is to input digital signal filter removal noise, input AD corresponding with input EDFA light intensity signals is generated
DATAin 302 is sampled, while AD samplings generation and EDFA are exported by exporting sample circuit 108 and analog-digital converter ADC3109
The corresponding output AD of output intensity signal samples DATAout 303, according to input AD sampling 302 data of DATAin and output AD
303 data computing system steady-state error Error=DATAout-DATAin*Gain-ASE of DATAout are sampled, Gain is in formula
The gain of EDFA amplifiers, ASE are the amplified spontaneous emission of EDFA amplifiers output；Systematic error result of calculation is pushed into instead
Present computing module 307.AD samplings DATAin302 data are inputted simultaneously and enter pump drive modules 301, according to yield value generation pair
The pump drivings feedforward 305 answered.Fifo controller 104 will input AD sampling 302 data of DATAin push-in division arithmetics IP simultaneously
Core 304 makes decisions, and by feedback computing module 307, is compensated to the integral term of PID control according to following formula, completes
The calculating of feedback control loop.
DFIFO=| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2)
PID=P*error0+D*error0+ΣI*error
Wherein dFIFO is the result of calculation of division calculation IP kernel 107, represents the amplitude of input EDFA light intensity variation, F
(dFIFO) function for being dFIFO, characterizes the compensation calculation of PID integral terms.error0For the gain error of present clock；In formula,
P is the proportional in PID proportional integral differential, and I is integral term, and D is differential term, error0Most for present sample clock in array
New samples the linear gain difference that FIFO subtractions obtain, error by input and outputnIt is n-th of meter when module starts
Obtained error.
The existing light amplifier gain control loop by pid algorithm, only to being accumulated under previous stable state
Subitem I's is cumulative, and the I generated under input and output light change condition cumulative is wrong for reaching stable I under new state to add up
Accidentally, the cumulative item before input light is stablized all is harmful for the foundation of new stable state after input light stabilization.Due to the item that adds up
Determine last output, once so in PID modules, the output of P proportionals occupies the smaller i.e. input light of PID overall outputs close to most
When whole state, it is whole to lead to the overshoot of mistake to will produce prodigious mistuning for the cumulative items of the wrong I of generation before new state is established
Or owe punching, the time that the second new state reaches stable exactly (are added up by I by convergent speed and finally reach stable speed)
It determines.The present invention inhibits the cumulative items of the I of mistake, by the detection to input light amplitude of variation to reach neither
The foundation of entire feedback loop can be destroyed, and stabilization can be rapidly reached.
Above example is only one embodiment of the present invention, the description thereof is more specific and detailed, but cannot therefore and
It is interpreted as the limitation to the scope of the claims of the present invention.Its concrete structure and size can be adjusted correspondingly according to actual needs.It answers
When, it is noted that for those of ordinary skill in the art, without departing from the inventive concept of the premise, can also make
Several modifications and improvements, these are all within the scope of protection of the present invention.
Claims (9)
1. a kind of optical amplifier transient inhibition quickly approaches device, it is characterised in that including：Input parallel sampling circuit, input terminal
Analog-digital converter, output sample circuit, output end analog-digital converter, fifo controller, division arithmetic module, PID arithmetic module；
Wherein,
The input parallel sampling circuit converts the light intensity signal for inputting image intensifer to input optical intensity voltage signal；
The input optical intensity voltage signal is converted to input light intensity sampled data signal by the input terminal analog-digital converter；It is described
Input terminal analog-digital converter includes first input end analog-digital converter and the second input terminal analog-digital converter, and the input is adopted parallel
The voltage signal of two-way and input image intensifer light intensity amplitude in proportion is inputted first input end analog-to-digital conversion by sample circuit respectively
Device and the second input terminal analog-digital converter, first input end analog-digital converter and the second input terminal analog-digital converter distinguish corresponding position
The voltage signal for managing different amplitude sizes, to expand the light intensity detection range of input image intensifer；
The fifo controller is by the input light before the input light intensity sampled data of present sample time and m sampling clock cycle
Strong sampled data is delivered separately to first in first out data queue；
The division arithmetic module reads data from the first in first out data queue, will be defeated before and after m sampling clock cycle
The change information for entering light intensity passes to the PID arithmetic module；
The output sample circuit converts the light intensity signal exported from image intensifer to output intensity voltage signal；
The output intensity voltage signal is converted to output intensity sampled data signal by the output end analog-digital converter；
The PID arithmetic module is calculated according to the input light intensity sampled data signal and the output intensity sampled data signal
Pid control parameter is to realize the closed loop feedback control of image intensifer, and the PID arithmetic module is according to the input light intensity
Change information compensates the pid control parameter.
2. the optical amplifier transient inhibition according to any one of claim 1 quickly approaches device, it is characterised in that：To institute
Pid control parameter is stated to compensate including compensating the integral term in pid control parameter.
3. the optical amplifier transient inhibition according to any one of claim 1-2 quickly approaches device, it is characterised in that：It is right
The pid control parameter, which is compensated, to be calculated including the use of the differential term in pid control parameter to the integral in pid control parameter
Item compensates.
4. the optical amplifier transient inhibition according to any one of claim 3 quickly approaches device, it is characterised in that：It is described
Fifo controller is by the input light intensity hits before the input light intensity sampled data of present sample time and m sampling clock cycle
It is spliced into Liang Ge first in first out data queue according to respectively in accordance with precedence, producing a data structure by sampling order is
The data sequence FIFO1 of (D1, D2 ..., Dn) and a data structure are the data sequence of (D1+m, D2+m ..., Dn+m)
FIFO2, wherein D1 are the input light intensity value of current sample period, and D1+m is the input light intensity value before m sampling clock cycle, number
Head data Dn according to sequence FIFO1 is the light intensity value before n sampling clock cycle, and the head data Dn+m of data sequence FIFO2 is n
Light intensity value before+m sampling periods, wherein m and n are positive integer and m>n>1.
5. optical amplifier transient inhibition according to claim 4 quickly approaches device, it is characterised in that：According to following judgements
Condition judges whether pid control parameter compensates：
Judgment condition 1：| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2) ＜ Δs D
Judgment condition 2：|(ΣFIFO1-ΣFIFO2)|/(ΣFIFO1+ΣFIFO2)≥ΔD
Wherein, Σ FIFO1 be data queue FIFO1's and value, Σ FIFO2 be data queue FIFO2's and value, Δ D be can match
The proportionate relationship set represents after the fifo controller and the division arithmetic module secondary filtering, the input detected
The light intensity amplitude of variation of image intensifer.
6. optical amplifier transient inhibition according to claim 5 quickly approaches device, it is characterised in that：According to following formula
The integral term of pid control parameter is compensated：
DFIFO=| (Σ FIFO1- Σ FIFO2) |/(Σ FIFO1+ Σ FIFO2)
PID=P*error0+D*error0+ΣI*error
Wherein, dFIFO is the result of calculation of division calculation module, represents the amplitude of input image intensifer light intensity variation, F
(dFIFO) function for being dFIFO, characterizes the compensation calculation of integral term in pid control parameter, and error is the gain of image intensifer
Error, error0For the gain error of present sample clock cycle, errornIt is that the gain that n-th of sampling clock cycle obtains misses
Difference, P, I, D are proportional, integral term, differential term in pid control parameter respectively.
7. according to any in claim 1 either claim 2 or claim 4 or claim 5 or claim 6
Optical amplifier transient inhibition described in quickly approaches device, it is characterised in that：The image intensifer be erbium-doped fiber amplifier,
Raman Fiber Amplifier, Now therefore to all whom it may concern or high-power fiber amplifier.
8. optical amplifier transient inhibits quick approach method, it is characterised in that including：
Convert the light intensity signal for inputting image intensifer to input optical intensity voltage signal；
Using the input terminal analog-digital converter including first input end analog-digital converter and the second input terminal analog-digital converter, by two
Road and the voltage signal for inputting image intensifer light intensity amplitude in proportion input first input end analog-digital converter and second defeated respectively
Enter and hold analog-digital converter, first input end analog-digital converter and the second input terminal analog-digital converter distinguish alignment processing difference amplitude
The voltage signal of size, to expand the light intensity detection range of input image intensifer, to realize the input light strong voltage
Signal is converted to input light intensity sampled data signal；
Pass through the input light intensity sampled data meter before the input light intensity sampled data of present sample time and m sampling clock cycle
It calculates and obtains the change information of the front and back input light intensity of m sampling clock cycle；
Convert the light intensity signal exported from image intensifer to output intensity voltage signal；
The output intensity voltage signal is converted into output intensity sampled data signal；
Pid control parameter is calculated with reality according to the input light intensity sampled data signal and the output intensity sampled data signal
The closed loop feedback control of existing EDFA, and the pid control parameter is compensated according to the change information of the input light intensity.
9. optical amplifier transient according to claim 8 inhibits quick approach method, it is characterised in that：The PID is controlled
Parameter processed, which is compensated, mends the integral term in pid control parameter including the use of the differential term calculating in pid control parameter
It repays.
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| CN111934180B (en) * | 2020-07-31 | 2021-09-10 | 武汉光迅电子技术有限公司 | Transient suppression control method and device, optical fiber amplifier and readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6172801B1 (en) * | 1997-01-14 | 2001-01-09 | Fujitsu Limited | Optical amplifier, optical amplifying apparatus, optical transmitter for use in optical communications system, and optical surge suppression method for the optical amplifier |
| CN1430370A (en) * | 2001-12-29 | 2003-07-16 | 深圳市中兴通讯股份有限公司上海第二研究所 | Erbium adulterated optical fiber amplifier gain control apparatus |
| CN101086594A (en) * | 2006-06-07 | 2007-12-12 | 中兴通讯股份有限公司 | Optical amplifier transient suppression method and control circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6172801B1 (en) * | 1997-01-14 | 2001-01-09 | Fujitsu Limited | Optical amplifier, optical amplifying apparatus, optical transmitter for use in optical communications system, and optical surge suppression method for the optical amplifier |
| CN1430370A (en) * | 2001-12-29 | 2003-07-16 | 深圳市中兴通讯股份有限公司上海第二研究所 | Erbium adulterated optical fiber amplifier gain control apparatus |
| CN101086594A (en) * | 2006-06-07 | 2007-12-12 | 中兴通讯股份有限公司 | Optical amplifier transient suppression method and control circuit |
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