偏振模色散對光孤子傳輸系統(tǒng)影響的數(shù)值研究.pdf

1、分類號：UDC：TN912密級：編號：學(xué)位論文05080901M偏振模色散對光孤子傳輸系統(tǒng)影響的數(shù)值研究康霞指導(dǎo)教師姓名：劉劍飛副教授河北工業(yè)大學(xué)申請學(xué)位級別：碩士論文提交日期：!Q!!生!月學(xué)位授予單位：塑j墾墨些盤堂學(xué)科、專業(yè)名稱：物理電子學(xué)論文答辯日期：答辯委員會(huì)主席：評閱人：2005年3月偏振模色散對光孤子傳輸系統(tǒng)影響的數(shù)值研究NUMERRICALSlMULATIoNoFTHElNFLUENCEoFPoLARIZATIoNMoD

2、EDISPERSIoNONSoLIToNTRANSMISSl0NSYSTEMSABSTRACTThesolitontransmissionsystemhasgreatpotentialforprovidinghighspeedandlongdistancecommunicationItCanimprovetheperformanceofopticalfibers’communicationsystemComparingwiththeco

3、nventionalopticalfibercommunicationsystemusinglinearityopticsprinciple，thesolitontransmissionsystemhastremendouscommunicationcapacityThecapacitywiltenlarge10orevell100timesitsrelaydistancecanreachseveralhundredskmAtthesa

4、nletime，PMDrestrictthefibertransmissionsystem’ScapacityIthasbeenallimportantfactthatIimitthehi吐speedtransmissionsystemWhilesolitoncanrestrainpulsesplitandexcessspreadSOitiSconsideredCancounteractPMDeffectatsomedegreesThi

5、spaperusesnumericalsimulationstocalculatetheNonlinearSchro”dingel’EquationswitIlthePMDeffectUsingtheSplitStepFourierMethodinoursimulationitmainlyinvestigatethetransmissionpropertiesoftheManakOV—solitoni11opticalfiberswim

6、PMD，TheselftrappingeffectforasinglepulseofSolitonhasbeendiscussed，WhichcanpreventasolitonpulsewithPMDfromsplittingThenWCtakethepulsesequencesintoaccount、whichiSmoresignificanceinrealtransmissionlinkwediscusstheinteractio

7、noftwosolitonpulsesandthelOSSofSolitonenergyTheresultsofnumericalvMueresearchprorethat，forthesinglepulseofsoliton，withouttransmissionloseconsiderationthePMDeffectwillnotonlyinfluencethesolitonpulsebroadeningbutalsomaketI

8、lefrequencydisturbedanddestroytheshapeofthesolitonThePMDeffectwillenlargeastheGVDparameterincreasePMDalsoinfluencethethresholdofsolitonselgtrappingeffect西ethresholdwillenlargeasthePMDeffectincreaseTherewillproducenotable

9、selftrappingelTectThcsolitonrobustnesstoPMDcarlbeprovedBecauseoftherandomot‘PMDtheangleofPolarizationhasnoeffectonselftrappingWhentakethepulsesequencesintoaccount，thetwopulseshavetheoppositephaseanddifferentamplitude，the

10、ywillfolinaquasiequidistantboundstateThesotitoninterferenceiSalmostcompletelysuppressedThePMDeffectonlymakethesolitonsproducedispersivewavesandbringtimingiittersThedispersivewavescausesolitontransmissionsystemstoloseener

11、gyInrealfibercommunicationsystems，usingpolarizationdivisionmultiplexingfPDMlandmakesolitonshavedifferentamplitudeearlimprovethecapabilityKEYWORDS：soliton，polarizationmodedispersion(PMD)，split—stepfouriermethod，selftrappi