CN101729186B - Device and method for controlling transient effect in erbium-doped fiber amplifier (EDFA) - Google Patents
Device and method for controlling transient effect in erbium-doped fiber amplifier (EDFA) Download PDFInfo
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- CN101729186B CN101729186B CN 200910228983 CN200910228983A CN101729186B CN 101729186 B CN101729186 B CN 101729186B CN 200910228983 CN200910228983 CN 200910228983 CN 200910228983 A CN200910228983 A CN 200910228983A CN 101729186 B CN101729186 B CN 101729186B
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Abstract
The invention discloses a device and a method for controlling the transient effect in an erbium-doped fiber amplifier (EDFA). The device comprises a photoelectric detection diode, a transconductance circuit, an analog to digital converter, a digital processor and a pump laser which are connected in sequence, wherein the pump laser is used for the analog to digital converter, and the photoelectric detection diode is used for receiving the optical fiber inputted by the EDFA. The method comprises the following steps: making the digital signals obtained by the conversion of the analog to digital converter enter a first in first out (FIFO) data queue to capture the change of optical intensity; comparing the data on the head and the tail of the FIFO data queue under the normal stage model and making the FIFO data queue be in the pre-regulation stage mode if the change of the optical intensity being more than a set proportion; locking the data on the head of the FIFO data queue, continuously comparing the data on the head of the FIFO data queue and the data on the tail of the FIFO data queue and making the FIFO data queue be in the over-regulation stage model if the change of the optical intensity being more than a preset proportion; and finally adjusting the control current of the pump laser of the EDFA rapidly when the optical intensity changing suddenly so as to control the transient effect. The invention can be used for adjusting the EDFA of any type and any requirement without changing the hardware, thus the production efficiency and the flexibility are improved.
Description
Technical field
The present invention relates to the control method of transient effect among a kind of EDFA of inhibition.Particularly relate to the transient effect of a kind of energy establishment EDFA, thereby improve the performance of EDFA, guarantee the control method of transient effect among the reliable and stable inhibition EDFA of whole optical communication system.
Background technology
In dense wavelength division system (DWDM), the larger variation of light signal strength generation when input Erbium-Doped Fiber Amplifier (EDFA) (EDFA), for example 40 road different wave length signals become when only remaining 1 the tunnel, inputting total light intensity descends suddenly about 16dB, energy in the bait fibre can be transferred in the remaining signal moment, make this signal produce overshoot, otherwise then for owing punching.Overshoot and can have a strong impact on Systems balanth when owing to be punched in multistage EDFA cascade is so must control in every one-level EDFA.
Transient state suppresses and can study from optics, hardware and three aspects of software, and the above two all need the raising on the cost.Generally need on the optics to realize by increasing parts, for example propose to increase a bulk of optical feedback device among the patent Optical amplifier with power dependentfeedback (US6339495) and realize that transient state suppresses; The general higher electron device of employing performance that passes through guarantees enough fast response speed and precision on the hardware, for example proposes a kind of circuit feedback assembly enforcement transient state that can establish by gaining among the Optical amplifiertransient control apparatus (US6678088) and suppresses.Improvement on the software then can promote on the basis that material cost does not increase the overall performance of EDFA.The present invention just is being based on the improvement of software algorithm, proposes structure and the algorithm flow of a kind of effective control EDFA.
Summary of the invention
Technical matters to be solved by this invention is, provide under a kind of control mode that is in automatic gain locking (AGC) at EDFA, when the input light intensity changes, transient effect that can establishment EDFA, thereby improve the performance of EDFA, guarantee the control method of transient effect among the reliable and stable inhibition EDFA of whole optical communication system.
The technical solution adopted in the present invention is: a kind of device that suppresses transient effect among the EDFA, include: the light signal that receives the EDFA input is converted to the photodetection diode of electric signal, receive the transconductance circuit of the signal of photodetection diode, the analog signal conversion that transconductance circuit is exported is the analog to digital converter of digital signal, digital signal after the analog to digital converter conversion is carried out the digital processing unit that data are processed, convert the digital signal after the digital processor processes digital to analog converter of simulating signal to, make the analogue signal generating luminous energy of digital to analog converter output be coupled into the pump laser of Er-doped fiber.
Described digital processing unit adopts digital processing chip.
Another technical scheme of the present invention is: the device of transient effect among a kind of EDFA of inhibition, include: the light signal that receives the EDFA input is converted to the photodetection diode of electric signal, receive the logarithm amplifier device of the signal of photodetection diode, the analog signal conversion that the logarithm amplifier device is exported is the analog to digital converter of digital signal, digital signal after the analog to digital converter conversion is carried out the digital processing unit that data are processed, convert the digital signal after the digital processor processes digital to analog converter of simulating signal to, make the analogue signal generating luminous energy of digital to analog converter output be coupled into the pump laser of Er-doped fiber.
Described digital processing unit adopts digital processing chip.
Control method in a kind of device for suppressing the EDFA transient effect of the present invention, include: first in first out data queue, the normal phase pattern, preset stage model and toning stage model, the specific works process is: the digital signal by the analog to digital converter conversion enters first in first out data queue successively, carries out the seizure that light intensity changes in formation; At first under the normal phase pattern, the end to end data of first in first out data queue compare, change greater than one set ratio the time, enter the preset stage model; Lock a data of first in first out data queue this moment, and proceeding end to end, data relatively after changing greater than preset proportion, enter the toning stage model; At the toning stage model, the setting of normal ratio is preset or is surpassed in the output of analog to digital converter, finally make pump laser control electric current rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
The design degree of depth corresponding with system requirements under the normal phase pattern, data are adjudicated light intensity political reform amplitude more end to end; After entering the preset stage model, locking mantissa certificate, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue; Whether adjudicate light intensity by the variation of a two bits after entering the toning stage model stablizes.
To adopt following computing formula to judge in the method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula (501) is I under the normal condition
Pump'sComputing formula, K is the feedforward scale factor, and x is the input intensity levels, and B is the bias adjustment amount; Formula (502) is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula (503) is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue (105), P
1Be configurable ratio; Formula (504) is judgment condition 2, and P2 is configurable ratio; Formula (505) is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue (105), P
3Be configurable ratio.
Another kind of the present invention is for the control method in the device that suppresses the EDFA transient effect, include: logarithm lookup table, first in first out data queue, the normal phase pattern, preset stage model and toning stage model, the specific works process is: by the digital signal of the logarithmic relationship of analog to digital converter conversion, first by being converted to linear relationship after the logarithm lookup table, then, enter successively first in first out data queue, in formation, carry out the seizure that light intensity changes; At first under the normal phase pattern, the end to end data of first in first out data queue compare, change greater than one set ratio the time, enter the preset stage model; Lock a data of first in first out data queue this moment, and proceeding end to end, data relatively after changing greater than preset proportion, enter the toning stage model; At the toning stage model, the setting of normal ratio is preset or is surpassed in the output of analog to digital converter, finally make pump laser control electric current rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
The design degree of depth corresponding with system requirements under the normal phase pattern, data are adjudicated light intensity political reform amplitude more end to end; After entering the preset stage, locking mantissa certificate, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue; Whether adjudicate light intensity by the variation of a two bits after entering the toning stage stablizes.
To adopt following computing formula to judge in the method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula (501) is I under the normal condition
PumpComputing formula, K for the feedforward scale factor, x for the input intensity levels, B is the bias adjustment amount; Formula (502) is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula (503) is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue (105), P
1Be configurable ratio; Formula (504) is judgment condition 2, and P2 is configurable ratio; Formula (505) is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue (105), P
3Be configurable ratio.
The control method of transient effect among the inhibition EDFA of the present invention has following features:
1, do not increase hardware cost.With respect to other improved procedures, the optimization on the algorithm does not need to increase material cost;
2, the transient state inhibition is remarkable.Experimental results show that: be controlled in the 1dB by EDFA transient state inhibition of the present invention;
3, flexible working mode.Based on the parameters setting on the algorithm, can be to different model, the EDFA of different demands adjusts on the constant basis of hardware, has improved greatly production efficiency and flexibility ratio.
Description of drawings
Fig. 1 is the apparatus structure block diagram that suppresses transient effect among the EDFA;
Fig. 2 is the structured flowchart that suppresses device second example of transient effect among the EDFA;
Fig. 3 is fifo queue work block diagram;
Fig. 4 is the realization flow figure of toning mechanism;
Wherein:
101: photodiode 102: transconductance circuit
103: analog to digital converter 104: digital processing unit
105: first in first out data queue 106: the normal phase pattern
107: preset stage model 108: the toning stage model
109: analog to digital converter 110: pump laser
111: Er-doped fiber 203: normal phase FIFO operational module
204: be in harmonious proportion in advance the mantissa of toning stage F IFO operational module 205:FIFO formation according to D
n
The inferior mantissa of 206:FIFO formation is according to D
N-1A data D of 207:FIFO formation
1
402: logarithmic amplifier 405: logarithm lookup table
406: first in first out data queue 407: the normal phase pattern
408: preset stage model 409: the toning stage model
Embodiment
Below in conjunction with embodiment and accompanying drawing the control method that suppresses transient effect among the EDFA of the present invention is made a detailed description.
As shown in Figure 1, the device of transient effect among the inhibition EDFA of the present invention, include: the light signal that receives the EDFA input is converted to the photodetection diode 101 of electric signal, receive the transconductance circuit 102 of the signal of photodetection diode 101, the analog signal conversion that transconductance circuit 102 is exported is the analog to digital converter 103 of digital signal, digital signal after analog to digital converter 103 conversions is carried out the digital processing unit 104 that data are processed, digital signal after digital processing unit 104 processed converts the digital to analog converter 109 of simulating signal to, makes the analogue signal generating luminous energy of digital to analog converter 109 outputs be coupled into the pump laser 110 of Er-doped fiber 111.Described digital processing unit 104 adopts digital processing chip, can adopt DSP or fpga chip.
Its course of work is specific as follows: the portion of energy of the input signal light of EDFA enters photodetection diode 101, be converted to current signal, again through oversampling circuit, for example after transconductance circuit TIA 102 conversions, by analog to digital converter 103, be the digital collection value with analog signal conversion.Analog to digital converter 103 is connected with digital processing chip 104, in digital processing unit, data are processed, Output rusults passes to digital to analog converter 109 the most at last, and driving pump laser 110, produce luminous energy and be coupled into Er-doped fiber 111, realize that EDFA is to the enlarging function of input optical signal.And in digital processing unit 104, algorithm flow can be decomposed into several operational modules: at first the transformation result of analog to digital converter 103 pushes in the fifo queue (first in first out data queue) 105 successively according to first-in first-out mechanism, compare by the collection value to different time points in the fifo queue 105, the amplitude of variation of judgement input light intensity, thereby enter three different operating stage models: normal phase pattern 106, preset stage model 107, toning stage model 108.According to normal phase pattern 106, preset stage model 107, the condition selecting control pumping current value I of toning stage model 108 these three kinds of mode of operations
Pump, it is write digital to analog converter 109.
As shown in Figure 2, the device of transient effect among the inhibition EDFA of the present invention, can also be to include: the light signal that receives the EDFA input be converted to the photodetection diode 101 of electric signal, receive the logarithm amplifier device 402 of the signal of photodetection diode 101, the analog signal conversion that logarithm amplifier device 402 is exported is the analog to digital converter 103 of digital signal, digital signal after analog to digital converter 103 conversions is carried out the digital processing unit 104 that data are processed, digital signal after digital processing unit 104 processed converts the digital to analog converter 109 of simulating signal to, makes the analogue signal generating luminous energy of digital to analog converter 109 outputs be coupled into the pump laser 110 of Er-doped fiber 111.Described digital processing unit 404 adopts digital processing chip, can adopt DSP or fpga chip.
Its course of work and device shown in Figure 1 are basic identical, difference is: after photodetection diode (PD) 101 is converted to current signal with light signal, enter logarithmic amplifier (Log Amp) 402, the light intensity variation of its reflection is logarithmic relationship, for guaranteeing the quick and accuracy of light intensity judgement, in digital processing unit 404, add logarithm lookup table 405.Can utilize logarithmic relationship to adjudicate light intensity during specific implementation and change, and be that linear data calculates output output I with look-up table with the logarithmic relationship fast transition
Pump
Fig. 3 is fifo queue work block diagram, and as a computing module of digital processing unit 104 in Fig. 1 block diagram, its function is to realize light intensity variation monitoring and mode adjudging.After analog to digital converter 103 is sent the light intensity signal sampled value into digital processing chip 104, push successively in the fifo queue that the degree of depth is N by the principle of first-in first-out after, produced (D
n, D
N-1..., D
1) data sequence, wherein mantissa is according to D
n205 is up-to-date light intensity magnitude value, and inferior mantissa is according to D
N-1206 is 1 light intensity magnitude value before the sampling period, a data D
1207 is N-1 the light intensity magnitude value before the sampling period.Normal work stage FIFO working method 203 times, the data among the FIFO are constantly updated by the mechanism of first-in first-out; When light intensity began to change, working method changed, and FIFO enters preset stage and toning stage mode of operation 204, at this moment a data D
1207 is locked, only upgrades mantissa according to D
n205 and time mantissa according to D
N-1206, being equivalent to the degree of depth is that to be changed to the degree of depth be 2 for the formation of N.
As shown in Figure 1, the control method of transient effect among the inhibition EDFA of the present invention, include: first in first out data queue 105, normal phase pattern 106, preset stage model 107 and toning stage model 108, the specific works process is as shown in Figure 4: the digital signal by analog to digital converter 103 conversions enters first in first out data queue 105 successively, carries out the seizure that light intensity changes in formation; At first normal phase pattern 106 times, the end to end data of first in first out data queue 105 compare, change greater than one set ratio the time, enter preset stage model 107; Lock a data of first in first out data queue 105 this moment, and proceeding end to end, data relatively after changing greater than preset proportion, enter toning stage model 108; At toning stage model 108, the setting of normal ratio is preset or is surpassed in the output of analog to digital converter 109, finally make pump laser 110 control electric currents rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
At first according to the sample frequency of hardware analog to digital converter (ADC), select the reasonable time span to set up the First Input First Output (FIFO) that a degree of depth is N (N＞2), compare in real time the end to end sampled data (D in the formation
1, D
n) change (D wherein
1Be the most advanced data that enter formation, and D
nBe up-to-date data), we are referred to as normal work stage this one-phase;
As (D
1, D
n) change greater than the ratio P that sets
1The time, think that light intensity is initially located in variation tendency, lock the first bit data D among the FIFO this moment
1, only upgrade last two bits D
nAnd D
N-1, it is 2 that the FIFO that is equivalent to the degree of depth and is N is changed to the degree of depth, compares simultaneously (D
1, D
n) and (D
N-1, D
n) this one-phase we be referred to as the preset stage.Think that at this one-phase light intensity is changed to small size variation, I
PUMPStill carry out according to normal account form, but can the sensitive data in the EDFA system be locked, prevent thrashing;
As (D
1, D
n) change greater than the ratio P that sets
2The time, thinking that light intensity is initially located in transitional states, we are referred to as the toning stage this one-phase.This one-phase light intensity is changed to acute variation, to I
PUMPRealize abnormal regulation (502), can implement toning to pumping current by the mode of default or magnification ratio, thus establishment overshoot or the generation of owing to rush.
As (D
N-1, D
n) change less than the ratio P that sets
3The time, think that light intensity tends to be steady, this moment, FIFO returned normal condition.
Core of the present invention is that FIFO mechanism can the Real-Time Monitoring light intensity change, and the data that locking enters at first when light intensity changes, and strengthens data time span relatively, and light intensity changes thereby effectively adjudicate significantly.In photodetection diode (PD) electric current of reality, no matter be transconductance circuit (TIA) or the logarithmic amplifier (LOG AMP) of linear change, be subjected to the restriction of its bandwidth, the variation tendency of light intensity all can be weakened, particularly when small-signal.Adopt calculating of the present invention and control method, can under existing level of hardware, improve greatly seizure and the prediction that light intensity is changed, and pass through I
PUMPThe toning mode effectively suppresses the transient effect of EDFA.
Whole routine processes flow process at first is to enter data acquisition module 301 as shown in Figure 4, and sampled data is pushed fifo queue, and the mode of Data Update depends on mode of operation.Original state is the normal phase pattern, and all data all need to upgrade; The data of fifo queue enter comparison module 302, carry out | D
n-D
1| with ratio P
1Relatively judgement then enters preset phase process module 303 when changing greater than preset proportion, otherwise returns initial state; In 303, implement locking D
1Operation, this moment FIFO renewal D only
nAnd D
N-1, because this phase detection slightly changes to light intensity, can to system's sensing unit, lock or other operations such as enforcements such as variable optical attenuator VOA; Locking D
1Rear continuation is carried out in certain hour length | D
n-D
1| with ratio P
2Relatively judging module 304 then enters toning phase process module 305 when changing greater than preset proportion, otherwise returns to initial state; 305 are toning phase process module, and implementation is according to the I that arranges of default current value or magnification ratio
PumpAfter accomplishing the setting up enter | D
n-D
N-1| with ratio P
3Compare judging module 306, whether this judging module judgement light intensity variation tends to be steady, if still change fast in moment, then settings is delivered to digital-to-analog conversion processing module 307, otherwise returns original state.When adopting parallel data processing mechanism, all be synchronous operation with upper module, guaranteed the promptness that data are processed.
In 106 times design degree of depth corresponding with system requirements of normal phase pattern, data are adjudicated light intensity political reform amplitude more end to end; After entering preset stage model 107, locking mantissa certificate, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue 105; Whether adjudicate light intensity by the variation of a two bits after entering toning stage model 108 stablizes.
To adopt following computing formula to judge in the said method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula 501 is I under the normal condition
PumpComputing formula, K for the feedforward scale factor, x for the input intensity levels, B is the bias adjustment amount; Formula 502 is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula 503 is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue 105, P1 is configurable ratio; Formula 504 is judgment condition 2, P
2Be configurable ratio; Formula 505 is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue 105, P
3Be configurable ratio.
As shown in Figure 2, the control method of transient effect among the inhibition EDFA of the present invention, it can also be to include: logarithm lookup table 105, first in first out data queue 406, normal phase pattern 407, preset stage model 408 and toning stage model 409, the specific works process is: by the digital signal of the logarithmic relationship of analog to digital converter 103 conversion, first by being converted to linear relationship after the logarithm lookup table 105, then, enter successively first in first out data queue 406, in formation, carry out the seizure that light intensity changes; At first normal phase pattern 407 times, the end to end data of first in first out data queue 406 compare, change greater than one set ratio the time, enter preset stage model 408; Lock a data of first in first out data queue 406 this moment, and proceeding end to end, data relatively after changing greater than preset proportion, enter toning stage model 409; At toning stage model 409, the setting of normal ratio is preset or is surpassed in the output of analog to digital converter 109, finally make pump laser 110 control electric currents rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
In 407 times design degree of depth corresponding with system requirements of normal phase pattern, data are adjudicated light intensity political reform amplitude more end to end; After entering the preset stage 408, locking mantissa certificate, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue 406; Whether adjudicate light intensity by the variation of a two bits after entering the toning stage 409 stablizes.
To adopt following computing formula to judge in the said method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula 501 is I under the normal condition
PumpComputing formula, K for the feedforward scale factor, x for the input intensity levels, B is the bias adjustment amount; Formula 502 is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula 503 is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue 105, P
1Be configurable ratio; Formula 504 is judgment condition 2, and P2 is configurable ratio; Formula 505 is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue 105, P
3Be configurable ratio.
Claims (6)
1. control method that suppresses transient effect among the EDFA, it is characterized in that, include: first in first out data queue (105), normal phase pattern (106), preset stage model (107) and toning stage model (108), the specific works process is: the digital signal by analog to digital converter (103) conversion enters first in first out data queue (105) successively, carries out the seizure that light intensity changes in formation; At first under normal phase pattern (106), the end to end data of first in first out data queue (105) compare, and are changing greater than a ratio P who has set
1The time, enter preset stage model (107); Lock a data of first in first out data queue (105) this moment, and proceeding end to end, data are relatively changing greater than preset proportion P
2After, enter toning stage model (108); In toning stage model (108), the setting of normal ratio is preset or is surpassed in the output of logarithmic mode converter (109), finally make pump laser (110) control electric current rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
2. the control method of transient effect among the inhibition EDFA according to claim 1 is characterized in that, in the lower design of normal phase pattern (106) degree of depth corresponding with system requirements, data are adjudicated the light intensity amplitude of variation more end to end; After entering preset stage model (107), the elongated insertion part data, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue (105); Whether after entering toning stage model (108), pass through the variation of tail two bits greater than the ratio P that sets
3Judge whether light intensity is stable.
3. the control method of transient effect among the inhibition EDFA according to claim 1 is characterized in that, is to adopt following computing formula to judge in the method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula (501) is I under the normal condition
PumpComputing formula, K for the feedforward scale factor, x for the input intensity levels, B is the bias adjustment amount; Formula (502) is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula (503) is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue (105), P
1Be configurable ratio; Formula (504) is judgment condition 2, P
2Be configurable ratio; Formula (505) is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue (105), P
3Be configurable ratio;
Under normal phase pattern (106), when satisfying judgment condition 1, system enters preset stage model (107) by normal phase pattern (106); Under preset stage model (107), enter toning stage model (108) when satisfying 2 of judgment condition; Under toning stage model (108), judgment condition 3 begins to work, and when judgment condition 3 did not satisfy, system came back to normal phase pattern (106).
4. control method that suppresses transient effect among the EDFA, it is characterized in that, include: logarithm lookup table (405), first in first out data queue (406), normal phase pattern (407), preset stage model (408) and toning stage model (409), the specific works process is: by the digital signal of the logarithmic relationship of analog to digital converter (103) conversion, first by being converted to linear relationship after the logarithm lookup table (405), then, enter successively first in first out data queue (406), in formation, carry out the seizure that light intensity changes; At first under normal phase pattern (407), the end to end data of first in first out data queue (406) compare, change greater than one set ratio the time, enter preset stage model (408); Lock a data of first in first out data queue (406) this moment, and proceeding end to end, data relatively after changing greater than preset proportion, enter toning stage model (409); In toning stage model (409), the setting of normal ratio is preset or is surpassed in the output of logarithmic mode converter (109), finally make pump laser (110) control electric current rapid adjustment when the light intensity burst changes of EDFA, thus the transient suppression effect.
5. the control method of transient effect among the inhibition EDFA according to claim 4 is characterized in that, in the lower design of normal phase pattern (407) degree of depth corresponding with system requirements, data are adjudicated the light intensity amplitude of variation more end to end; After entering the preset stage (408), the elongated insertion part data, the assurance beam intensity ratio is carried out at a long time span, and need not expand the degree of depth of first in first out data queue (406); Whether the variation by the tail two bits after entering toning stage model (409) judges greater than the ratio of setting whether light intensity is stable.
6. the control method of transient effect among the inhibition EDFA according to claim 4 is characterized in that, is to adopt following computing formula to judge in the method:
Normal lower output: I
Pump=Kx+B ← (501)
Export under the toning: I
Pump=K * F (x)+B ← (502)
Judgment condition 1:(D
n-D
1)/D
1＞P
1← (503)
Judgment condition 2:(D
n-D
1)/D
1＞P
2← (504)
Judgment condition 3:(D
n-D
N-1)/D
N-1＞P
3← (505)
Wherein: formula (501) is I under the normal condition
PumpComputing formula, K for the feedforward scale factor, x for the input intensity levels, B is the bias adjustment amount; Formula (502) is I under the toning
PumpComputing formula, F (x) is for to the function that zooms in or out of input intensity levels, the ratio that zooms in or out is disposed by system requirements; Formula (503) is judgment condition 1, D
1And D
nBe respectively the first bit data and last bit data in the first in first out data queue (105), P
1Be configurable ratio; Formula (504) is judgment condition 2, P
2Be configurable ratio; Formula (505) is judgment condition 3, D
N-1And D
nBe last two bits in the first in first out data queue (406), P
3Be configurable ratio;
Under normal phase pattern (407), when satisfying judgment condition 1, system enters preset stage model (408) by normal phase pattern (407); Under preset stage model (408), enter toning stage model (409) when satisfying 2 of judgment condition; Under toning stage model (409), judgment condition 3 begins to work, and when judgment condition 3 did not satisfy, system came back to normal phase pattern (407).
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| CN102098109B (en) * | 2011-02-12 | 2014-06-11 | 武汉光迅科技股份有限公司 | EDFA transient effect suppression method |
| CN102611506B (en) * | 2012-03-09 | 2015-07-29 | 中国科学院上海光学精密机械研究所 | Light pulse position modulation signal receiver and data processing method thereof |
| CN102706537A (en) * | 2012-05-09 | 2012-10-03 | 武汉光迅科技股份有限公司 | Device for detecting transient state effect of erbium-doped fiber amplifier |
| CN103560834B (en) * | 2013-10-29 | 2016-01-20 | 武汉光迅科技股份有限公司 | The restraining device of multistage EDFA transient effect and suppressing method |
| CN103684606B (en) * | 2013-12-12 | 2016-06-08 | 武汉光迅科技股份有限公司 | A kind of system and method promoting the dynamic serviceability of fiber amplifier |
| CN105471498B (en) * | 2015-11-27 | 2017-11-10 | 武汉光迅科技股份有限公司 | The noiseless control device and methods of EDFA in a kind of all optical communication allotting network |
| CN108845552A (en) * | 2018-09-14 | 2018-11-20 | 中国神华能源股份有限公司 | data delay monitoring method, device, storage medium and processor |
| CN111917481B (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 |
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