CN101997613B - Adjusting method and device for dispersion compensation - Google Patents
Adjusting method and device for dispersion compensation Download PDFInfo
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- CN101997613B CN101997613B CN201010549132.1A CN201010549132A CN101997613B CN 101997613 B CN101997613 B CN 101997613B CN 201010549132 A CN201010549132 A CN 201010549132A CN 101997613 B CN101997613 B CN 101997613B
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- 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
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator
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Abstract
The invention discloses an adjusting method and device for dispersion compensation, wherein, the method comprises: acquiring an adjustable dispersion compensation module in a predetermined value range to predetermine a plurality of dispersion values of step size adjustment; calculating a peak signal contrast ratio corresponding to each output dispersion value, and selecting the peak signal contrast ratio with the maximum value from the obtained peak signal contrast ratios by calculating; and inputting a dispersion control voltage corresponding to the peak signal contrast ratio with the maximum value to the adjustable dispersion compensation module so as to enable the adjustable dispersion compensation module to output the dispersion value corresponding to the peak signal contrast ratio with the maximum value. The invention solves the problem of longer time adjustment of the system receiving end in the prior art, and has the effects of flexibility and low cost.
Description
Technical field
The present invention relates to Optical Fiber Transmission field, in particular to a kind of method of adjustment and device of dispersion compensation.
Background technology
In recent years, along with the raising of optical transmission system speed and the increase of capacity, with DQPSK (Differential Quadrature Phase Shift Keying, differential quadrature phase keying (DQPSK)), be more and more subject to the attention of industry for the light phase modulation method of representative.DQPSK modulator approach be that four outs of phase with light wave represent different data-signals, so its code element speed only has traditional light amplitude modulation method half.Because DQPSK modulation system has more superior performance, be more applicable for the optical transmission system of large capacity, long distance.
Traditional DQPSK receiving terminal adopts the reception technique of manually adjusting, at light time delay interferometer (Delay Line Interference, referred to as DLI) while entering horizontal phasing control, TDC (Tunable Chromatic Dispersion Compensation, adjustable dispersion compensating) module is not adjusted to dispersion compensation suitable value, but, system is carried out the adjustment of DLI phase place under LOF state, after DLI phase place is adjusted, carry out again match search (PatternSearch), find correct I, Q two-way phase combination, until frame losing (Lost of Frame, referred to as LOF) disappear, the last error rate of feeding back according to FEC is again carried out performance optimization adjustment.Wherein, it is longer that DLI phase place is adjusted the time, and this has extended the system initialization time greatly, has reduced the response speed of system.
In addition, present known receiving terminal reception technique can not be for incoherent reception, this is because first incoherent reception requires dispersion to be adjusted at one roughly in suitable scope, adjustment is spaced apart 100ps/nm, and assurance system can search effective error rate, so that system can search frame head, now the LOF of system disappears, carry out again TDC fine setting, adjust and be spaced apart 5～10ps/nm, the error rate before optimization system error correction.
Therefore, in the prior art, owing to the output of TDC module not being adjusted automatically, make system receiving terminal adjust the time longer.
Summary of the invention
For system receiving terminal in prior art, adjust the time and propose the present invention compared with long problem, for this reason, main purpose of the present invention is to provide a kind of method of adjustment and device of dispersion compensation, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, provide a kind of method of adjustment of dispersion compensation, it comprises: obtain a plurality of dispersion values that adjustable dispersion compensating module is adjusted with predetermined step-length in predetermined dispersion span; Calculate the peak signal contrast corresponding with the dispersion values of each output, and in the above-mentioned peak signal contrast calculating, select the peak signal contrast of value maximum; Dispersion corresponding to the peak signal contrast with above-mentioned value maximum controlled to voltage and input to above-mentioned adjustable dispersion compensating module, so that the above-mentioned adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of above-mentioned value maximum.
Further, obtaining adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span also comprises: the minimum value of above-mentioned adjustable dispersion compensating module from above-mentioned predetermined dispersion span starts to increase progressively the mode of above-mentioned predetermined step-length at every turn and export dispersion values, until surpass the maximum in above-mentioned predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with above-mentioned adjustable dispersion compensating module.
Further, obtaining adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span also comprises: the maximum of above-mentioned adjustable dispersion compensating module from above-mentioned predetermined dispersion span start at every turn the to successively decrease mode of above-mentioned predetermined step-length is exported dispersion values, until be less than the minimum value in above-mentioned predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with above-mentioned adjustable dispersion compensating module.
Further, the step of calculating the peak signal contrast corresponding with the dispersion values of each output comprises: the signal of telecommunication that obtains several cycles corresponding with the dispersion values of each output; Calculate the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtain the peak signal contrast in this cycle; From the peak signal contrast in above-mentioned several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values.
Further, by the peak value that is arranged on peak signal detector in two balanced recivers and detects the signal of telecommunication in several cycles corresponding with the dispersion values of each output; By being arranged on the above-mentioned pair of processor in balanced reciver, calculate the peak signal contrast corresponding with the dispersion values of each output, and in the above-mentioned peak signal contrast calculating, select the peak signal contrast of value maximum, wherein, above-mentioned adjustable dispersion compensating module is connected with above-mentioned pair of balanced reciver through optical demodulator.
Further, the span of above-mentioned predetermined step-length is 50ps/nm-100ps/nm.
To achieve these goals, according to a further aspect in the invention, provide a kind of adjusting device of dispersion compensation, it comprises: acquiring unit, a plurality of dispersion values of adjusting with predetermined step-length in predetermined dispersion span for obtaining adjustable dispersion compensating module; Processing unit for calculating the peak signal contrast corresponding with the dispersion values of each output, and is selected the peak signal contrast of value maximum in the above-mentioned peak signal contrast calculating; Feedback unit, for being controlled to voltage, dispersion corresponding to the peak signal contrast with above-mentioned value maximum input to above-mentioned adjustable dispersion compensating module, so that the above-mentioned adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of above-mentioned value maximum.
Further, above-mentioned acquiring unit comprises: the first acquisition module, for obtaining the dispersion values by above-mentioned adjustable dispersion compensating module output, wherein, the minimum value of above-mentioned adjustable dispersion compensating module from above-mentioned predetermined dispersion span starts to increase progressively the mode of above-mentioned predetermined step-length at every turn and exports above-mentioned dispersion values, until surpass the maximum in above-mentioned predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with above-mentioned adjustable dispersion compensating module; The second acquisition module, for obtaining the dispersion values by above-mentioned adjustable dispersion compensating module output, wherein, the maximum of above-mentioned adjustable dispersion compensating module from above-mentioned predetermined dispersion span start at every turn the to successively decrease mode of above-mentioned predetermined step-length is exported above-mentioned dispersion values, until be less than the minimum value in above-mentioned predetermined dispersion span, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with above-mentioned adjustable dispersion compensating module.
Further, above-mentioned processing unit comprises: acquisition module, for obtaining the signal of telecommunication in several cycles corresponding with the dispersion values of each output; Computing module, for calculating the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtains the peak signal contrast in this cycle; Select module, for the peak signal contrast from above-mentioned several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values.
Further, the adjusting device of above-mentioned dispersion compensation arranges in two balanced recivers, and wherein, above-mentioned adjustable dispersion compensating module is connected with above-mentioned pair of balanced reciver through optical demodulator.
In the present invention, by closed loop, automatically adjust the dispersion values of TDC module output, reduced system receiving terminal and adjusted the time, and the present invention has flexibly, feature cheaply.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in the specification write, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is a kind of preferred flow chart according to the method for adjustment of the dispersion compensation of the embodiment of the present invention;
Fig. 2 is according to a kind of preferred structural representation of the DQPSK receiving terminal of the embodiment of the present invention;
Fig. 3 is the preferred structural representation of another kind according to the DQPSK receiving terminal of the embodiment of the present invention;
Fig. 4 is according to the schematic diagram of the test data of the DQPSK receiving terminal of the embodiment of the present invention;
Fig. 5 is a kind of preferred structural representation according to the adjusting device of the dispersion compensation of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
Embodiment 1
Fig. 1 is a kind of preferred flow chart according to the method for adjustment of the dispersion compensation of the embodiment of the present invention, and it comprises the steps:
S102, obtains a plurality of dispersion values that adjustable dispersion compensating module is adjusted with predetermined step-length in predetermined dispersion span;
S104, calculates the peak signal contrast corresponding with the dispersion values of each output, and in the above-mentioned peak signal contrast calculating, selects the peak signal contrast of value maximum;
S106, controls voltage by dispersion corresponding to the peak signal contrast with above-mentioned value maximum and inputs to above-mentioned adjustable dispersion compensating module, so that the above-mentioned adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of above-mentioned value maximum.
In this preferred embodiment, can by closed-loop control, automatically TDC be adjusted to desired value according to the peak signal contrast of feedback, optimize receiving terminal performance, greatly shortened the adjustment time of optical module, simplified transmission system structure.
Preferably, obtaining adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span also comprises: the minimum value of described adjustable dispersion compensating module from described predetermined dispersion span starts to increase progressively the mode of described predetermined step-length at every turn and export dispersion values, until surpass the maximum in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.In this preferred embodiment, by the mode increasing progressively, can travel through rapidly dispersion values, thereby shorten the time of searching suitable dispersion values.
Preferably, obtaining adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span also comprises: the maximum of described adjustable dispersion compensating module from described predetermined dispersion span start at every turn the to successively decrease mode of described predetermined step-length is exported dispersion values, until be less than the minimum value in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.In this preferred embodiment, by the mode successively decreasing, can travel through rapidly dispersion values, thereby shorten the time of searching suitable dispersion values.
Preferably, the step of calculating the peak signal contrast corresponding with the dispersion values of each output comprises: the signal of telecommunication that obtains several cycles corresponding with the dispersion values of each output; Calculate the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtain the peak signal contrast in this cycle; From the peak signal contrast in described several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values.In this preferred embodiment, by choose peak signal contrast within some cycles, improved the accuracy that dispersion values is adjusted.
Preferably, by the peak value that is arranged on peak signal detector in two balanced recivers and detects the signal of telecommunication in several cycles corresponding with the dispersion values of each output; By being arranged on the described pair of processor in balanced reciver, calculate the peak signal contrast corresponding with the dispersion values of each output, and in the described peak signal contrast calculating, select the peak signal contrast of value maximum, wherein, described adjustable dispersion compensating module is connected with described pair of balanced reciver through optical demodulator.In this preferred embodiment, by peak signal detector being set in two balances inside, can effectively reduce the interference to peak signal detector, further improved the accuracy that dispersion values is adjusted.Certainly, peak signal detector also can be arranged at outside or other element internals of two balances.
Preferably, the span of described predetermined step-length is 50ps/nm-100ps/nm.Inventor finds, when predetermined step-length is less than 50ps/nm, to adjust overlong time through overtesting; When predetermined steps is grown up in 100ps/nm, can cause again the accuracy of adjustment not high.Therefore,, in this preferred embodiment, the span of predetermined step-length has not only guaranteed the shorter adjustment time but also has guaranteed the accuracy of adjusting.
Embodiment 2
At receiving terminal, first light signal amplifies through erbium-doped fiber amplifier (EDFA), residual dispersion after the long fibre of TDC module for compensating for light signal after amplifying, by DQPSK demodulator, realize again the work of light phase demodulation, DLI output Si road light signal enters two balanced recivers, complete opto-electronic conversion, the peak signal detector of receiving terminal detects the light signal peak value receiving and is converted into voltage signal output.The difference of definition peak signal maximum and minimum value is peak signal contrast, and theory is calculated and shown, when dispersion values is improper, peak signal contrast diminishes; When dispersion values is suitable, it is large that peak signal contrast becomes.
Fig. 2 is according to a kind of preferred structural representation of the DQPSK receiving terminal of the embodiment of the present invention.In the present embodiment, as shown in Figure 2, DQPSK receiving terminal comprises: DQPSK photodissociation modulator 201, two balanced reciver 202, signal amplification unit 203, signal gathering unit 204, signal processing unit 205, feedback control unit 206, erbium-doped fiber amplifier (EDFA) 207 and TDC module 208.
Concrete, DQPSK photodissociation modulator 201 is for completing the decoding of DQPSK light signal, two balanced recivers 202 are for completing the opto-electronic conversion of the rear light signal of decoding, wherein integrated peak signal detector output receives the peak value of the signal of telecommunication, this need to travel through DLI phase place (0～360 degree) in the short time, can obtain the peak signal in 2～3 cycles.
Signal amplification unit 203 has been mainly used in the enlarging function of peak signal voltage, because the peak signal amplitude of receiver output is less, need after amplifying, could accurately detect.Signal gathering unit 204 is mainly used in gathering the peak signal after amplifying and being converted to digital quantity, is convenient to subsequent treatment.Signal processing unit 205 calculates for the peak signal first obtaining according to traversal DLI phase place the peak signal contrast that each dispersion values is corresponding, again peak signal contrast corresponding to each dispersion values compared, obtain the peak signal contrast of value maximum.According to comparative result, control the dispersion of feedback control unit 206 outputs and control voltage, and then control the dispersion values of TDC module 208 outputs.
In the present embodiment, can find the maximum of peak signal contrast by closed-loop control, now the dispersion values of TDC be adjusted to most suitable place, closed-loop control meeting stops.Concrete debugging step flow process can be with reference to the method shown in figure 1.
In addition, in this preferred embodiment, by peak signal detector being set in two balances inside, can effectively reduce the interference to peak signal detector, further improve the accuracy that dispersion values is adjusted.Certainly, the invention is not restricted to this, peak signal detector also can be arranged at outside or other element internals of two balances.
Embodiment 3
Fig. 3 is the preferred structural representation of another kind according to the DQPSK receiving terminal of the embodiment of the present invention.As shown in Figure 3, DQPSK receiving terminal comprises: DQPSK photodissociation modulator 301, two balanced reciver 302, signal amplification unit 303 (comprising discharge circuit), signal gathering unit 304 (comprising analog to digital converter ADC), signal processing unit 305 (comprising Micro-processor MCV), feedback control unit 306 (comprising digital to analog converter DAC), erbium-doped fiber amplifier (EDFA) 307 and TDC module 308.
Input optical signal amplifies through EDFA, through TDC dispersion, adjust again, then by DQPSK photodissociation modulator, completing light signal decodes, through the two balanced recivers of decoded optical signals, complete opto-electronic conversion, the peak signal detector output voltage V PDET of two balanced recivers is completed and is amplified and translation functions by operational amplifier, operational amplifier output voltage is sent into and in ADC, is completed analog-to-digital conversion, deliver to again in MCU, MCU is by controlling the output of DAC and then controlling TDC, change the adjusted value of TDC, corresponding peaks signal can change, the signal amplitude value that enters MCU by ADC also can change, MCU can continue to adjust TDC according to the comparative result of peak signal contrast, until search out the maximum of peak signal contrast, now TDC adjusted is to desired value.The visible Fig. 4 of actual test data, when dispersion is that 500ps is to be optimum dispersion value, now corresponding peak signal contrast is maximum.
In the present embodiment, can find the maximum of peak signal contrast by closed-loop control, now the dispersion values of TDC be adjusted to most suitable place, closed-loop control meeting stops.Concrete debugging step flow process can be with reference to the method shown in figure 1.
In addition, in this preferred embodiment, by peak signal detector being set in two balanced recivers inside, can effectively reduce the interference to peak signal detector, further improve the accuracy that dispersion values is adjusted.Certainly, the invention is not restricted to this, peak signal detector also can be arranged at outside or other element internals of two balanced recivers.
Embodiment 4
Fig. 5 is a kind of preferred structural representation according to the adjusting device of the dispersion compensation of the embodiment of the present invention, and it comprises: acquiring unit 502, a plurality of dispersion values of adjusting with predetermined step-length in predetermined dispersion span for obtaining adjustable dispersion compensating module; Processing unit 504 for calculating the peak signal contrast corresponding with the dispersion values of each output, and is selected the peak signal contrast of value maximum in the described peak signal contrast calculating; Feedback unit 506, for being controlled to voltage, dispersion corresponding to the peak signal contrast with described value maximum input to described adjustable dispersion compensating module, so that the described adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of described value maximum.
In this preferred embodiment, can by closed-loop control, automatically TDC be adjusted to desired value according to the peak signal contrast of feedback, optimize receiving terminal performance, greatly shortened the adjustment time of optical module, simplified transmission system structure.
Preferably, described acquiring unit 502 comprises: the first acquisition module, for obtaining the dispersion values by described adjustable dispersion compensating module output, wherein, the minimum value of described adjustable dispersion compensating module from described predetermined dispersion span starts to increase progressively the mode of described predetermined step-length at every turn and exports described dispersion values, until surpass the maximum in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module; The second acquisition module, for obtaining the dispersion values by described adjustable dispersion compensating module output, wherein, the maximum of described adjustable dispersion compensating module from described predetermined dispersion span start at every turn the to successively decrease mode of described predetermined step-length is exported described dispersion values, until be less than the minimum value in described predetermined dispersion span, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.In this preferred embodiment, by the mode at increasing or decreasing, can travel through rapidly dispersion values, thereby shorten the time of searching suitable dispersion values.
Preferably, described processing unit 504 comprises: acquisition module, for obtaining the signal of telecommunication in several cycles corresponding with the dispersion values of each output; Computing module, for calculating the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtains the peak signal contrast in this cycle; Select module, for the peak signal contrast from described several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values.In this preferred embodiment, by choose peak signal contrast within some cycles, improved the accuracy that dispersion values is adjusted.
Preferably, the adjusting device of described dispersion compensation arranges in two balanced recivers, and wherein, described adjustable dispersion compensating module is connected with described pair of balanced reciver through optical demodulator.In this preferred embodiment, by the adjusting device of dispersion compensation is set in two balances inside, can effectively reduce the interference to the adjusting device of dispersion compensation, further improved the accuracy that dispersion values is adjusted.Certainly, the adjusting device of dispersion compensation of the present invention also can be arranged at outside or other element internals of two balances.
Preferably, the span of described predetermined step-length is 50ps/nm-100ps/nm.Inventor finds, when predetermined step-length is less than 50ps/nm, to adjust overlong time through overtesting; When growing up in 100ps/nm when predetermined steps, can cause again the accuracy of adjustment not high.Therefore,, in this preferred embodiment, the span of predetermined step-length has not only guaranteed the shorter adjustment time but also has guaranteed the accuracy of adjusting.
It should be noted that, in the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a method of adjustment for dispersion compensation, is characterized in that, comprising:
Obtain a plurality of dispersion values that adjustable dispersion compensating module is adjusted with predetermined step-length in predetermined dispersion span;
Calculate the peak signal contrast corresponding with the dispersion values of each output, and in the described peak signal contrast calculating, select the peak signal contrast of value maximum;
Dispersion corresponding to the peak signal contrast with described value maximum controlled to voltage and input to described adjustable dispersion compensating module, so that the described adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of described value maximum;
Wherein, the step of calculating the peak signal contrast corresponding with the dispersion values of each output comprises: the signal of telecommunication that obtains several cycles corresponding with the dispersion values of each output; Calculate the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtain the peak signal contrast in this cycle; From the peak signal contrast in described several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values;
Wherein, the span of described predetermined step-length is 50ps/nm-100ps/nm.
2. method according to claim 1, is characterized in that, obtains adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span and also comprises:
The minimum value of described adjustable dispersion compensating module from described predetermined dispersion span starts to increase progressively the mode of described predetermined step-length at every turn and exports dispersion values, until surpass the maximum in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.
3. method according to claim 1, is characterized in that, obtains adjustable dispersion compensating module step with a plurality of dispersion values of predetermined step-length adjustment in predetermined dispersion span and also comprises:
The maximum of described adjustable dispersion compensating module from described predetermined dispersion span start at every turn the to successively decrease mode of described predetermined step-length is exported dispersion values, until be less than the minimum value in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.
4. method according to claim 1, is characterized in that, by the peak value that is arranged on peak signal detector in two balanced recivers and detects the signal of telecommunication in several cycles corresponding with the dispersion values of each output; By being arranged on the described pair of processor in balanced reciver, calculate the peak signal contrast corresponding with the dispersion values of each output, and in the described peak signal contrast calculating, select the peak signal contrast of value maximum, wherein, described adjustable dispersion compensating module is connected with described pair of balanced reciver through optical demodulator.
5. an adjusting device for dispersion compensation, is characterized in that, comprising:
Acquiring unit, a plurality of dispersion values of adjusting with predetermined step-length in predetermined dispersion span for obtaining adjustable dispersion compensating module;
Processing unit for calculating the peak signal contrast corresponding with the dispersion values of each output, and is selected the peak signal contrast of value maximum in the described peak signal contrast calculating;
Feedback unit, for being controlled to voltage, dispersion corresponding to the peak signal contrast with described value maximum input to described adjustable dispersion compensating module, so that the described adjustable dispersion compensating module output dispersion values corresponding with the peak signal contrast of described value maximum;
Wherein, described processing unit comprises: acquisition module, for obtaining the signal of telecommunication in several cycles corresponding with the dispersion values of each output; Computing module, for calculating the maximum of the signal of telecommunication in each cycle and the difference of minimum value, obtains the peak signal contrast in this cycle; Select module, for the peak signal contrast from described several cycles, select the peak signal contrast of value maximum as the peak signal contrast corresponding with this dispersion values;
Wherein, the span of described predetermined step-length is 50ps/nm-100ps/nm.
6. device according to claim 5, is characterized in that, described acquiring unit comprises:
The first acquisition module, for obtaining the dispersion values by described adjustable dispersion compensating module output, wherein, the minimum value of described adjustable dispersion compensating module from described predetermined dispersion span starts to increase progressively the mode of described predetermined step-length at every turn and exports described dispersion values, until surpass the maximum in described predetermined dispersion span, wherein, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module;
The second acquisition module, for obtaining the dispersion values by described adjustable dispersion compensating module output, wherein, the maximum of described adjustable dispersion compensating module from described predetermined dispersion span start at every turn the to successively decrease mode of described predetermined step-length is exported described dispersion values, until be less than the minimum value in described predetermined dispersion span, it is corresponding that voltage is controlled in the dispersion that the dispersion values of each output receives with described adjustable dispersion compensating module.
7. device according to claim 5, is characterized in that, the adjusting device of described dispersion compensation arranges in two balanced recivers, and wherein, described adjustable dispersion compensating module is connected with described pair of balanced reciver through optical demodulator.
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| CN101997613B (en) * | 2010-11-17 | 2014-08-13 | 中兴通讯股份有限公司 | Adjusting method and device for dispersion compensation |
| CN102223184B (en) * | 2011-06-27 | 2017-10-10 | 中兴通讯股份有限公司 | Dispersion compensation method and device |
| US9367188B2 (en) | 2014-05-23 | 2016-06-14 | Apple Inc. | RC matching in a touch screen |
| CN105406919B (en) * | 2014-09-15 | 2019-08-23 | 中兴通讯股份有限公司 | A kind of method and device of dispersion compensation |
| US9800348B2 (en) * | 2014-11-18 | 2017-10-24 | Huawei Technologies Co., Ltd. | Chromatic dispersion estimation for digital coherent optical receivers |
| CN113810112A (en) * | 2020-06-15 | 2021-12-17 | 中兴通讯股份有限公司 | Chromatic dispersion adjustment method and device for WDM system |
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| WO2000079691A9 (en) * | 1999-06-22 | 2002-06-27 | Avanex Corp | Method and system for compensating for chromatic dispersion in an optical network |
| CN101369853A (en) * | 2008-09-26 | 2009-02-18 | 中兴通讯股份有限公司 | Method and apparatus for chromatic dispersion compensation of optimized wavelength passage |
| CN101753218A (en) * | 2009-12-29 | 2010-06-23 | 中兴通讯股份有限公司 | Method and device for compensating adaptive dispersion |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012065424A1 (en) | 2012-05-24 |
| CN101997613A (en) | 2011-03-30 |
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