偏振模色散补偿系统中信号偏振度特性的研究

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1、西南交通大学硕士学位论文偏振模色散补偿系统中信号偏振度特性的研究姓名：董运宽申请学位级别：硕士专业：通信与信息系统指导教师：罗斌20070401西南交通大学硕士学位论文IIPolarizationmodedispersion(PMD)hasbeenregardedasasevere，ultimatelimitationinhighbit·rate／long-distanceandhilghcapacityopticalfibercommunicationsystems．BecausethePMDeffectofopticallinkwillbroad

2、entheopticalpulseintimedomainandw0娼etheinter-symbolinterference(ISl)，theproductofopticalsignalwillalsobedegraded．PMDalsomakesdegeeofpolarization(DOP)degraded，ThisdirectlyimpairstheperformanceofthePMDcompensationsystem．Thetopicofthisthesisisfocused0ntheDOPtechniqueappliedtomonit

3、orthePMDoftheopticallinkandvariousfacto稻effectOnDOPcharacter．Firstly，asummaryoftherelatingconceptsofPMDanditscharacterizationisgiven．Themeasuremem，monitoringandcompensationofthePMDarealsodescribed．Basedonthefirst-orderassumption，allanalyticalexpressionoftheDOP，whichdependsonthe

4、differentialgroupdelay(DGD)ofsinglemodefiber，hasbeenderivedbyusingthetranslationrelationsbetweenJonesrepresentationandStocksrepresentation．UsingfastFouriertransform，thedynamicrangeandsensitivityoftheDOPtechniqueusedtomonitortheDGDofsinglechannelsystemhavebeensimulatedundervario

5、usfactorS．includingpulsechirp，dutycycle，extinctratio，andself-phasemodulation．Secondly，NumericalcalculationmethodsareusuallymorewidelyappliedinthenonlinearSchr&lingerequationfNLSElbecauseifitscomplexity．Themostcommomyusedalgorithmisthesplit-stepFouriermethod(SSFM)．Butintheactual

6、opticalcommunicationsystem，PMDisarandomfactorandfitforMaxwelldistributing．SowhenweNumericalcalculationNLSE，weletPMDjoinin，andthenWechangethesignal’sinputpowerandinvestigatehowthenonlinearfactoreffectonDOPcharacter．Finally，theperformanceofDOPtechniqueusedin40Gb／soptical西南交通大学硕士学

7、位论文communicationsystemhasbeensimulatedwithdifferentinitialpulsepowers．Thedependenceofthesystemoutageprobabilityonsignal’Speal【powerandtransmissiondistancehasalsobeeninvestigated．ThisishelpfulforsystemdesignandtheconfigurationofPMDcompensators．Keywords：DegreeofPolarization；Polar

8、izationModeDispersion；DifferentialGroupDelay；Nonlinear