单模单偏振微结构光纤的研究

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1、北京交通大学硕士学位论文单模单偏振微结构光纤的研究姓名：周志华申请学位级别：硕士专业：电磁场与微波技术指导教师：王智20060301ABSTRACTSin91epolarizationsinglemodefibers(SPSM)haVebeenpaida札entionsnotonlyintlleteleco伽nullicatiollS，butalsoindesignandfabricationoft11eoptical丘bersensorsa11d矗berlasers．TheconVentionalp01arization—maintaining(PM)fibershave

2、beenemployedfortheseapplications，butfibersaremoredesimble．Microstructuredopticalfibers(MOF)、vitllSpecialdesignedsnllctureshavemanyparticularcharacteristics．LightcaIlbepmgataedinsuchanMOF，andsomenovelphotonicdevicescanalsobeimplementedbyllsinghighbire衔ngentMOFs，extremelyloworhighnonlinearMO

3、Fs，etc．．Int11isdissertation，weconcentrateonanalyzingthepropertiesofSPSMfibers．sPsM讪erpeIInitsonlyonepolarizationmodetrarIsmittinginit．sPSMcaIlberealizcdwhenthehi曲eroneofthe‰damentalmodepaifinahighbire厅ingemfiberiscutof￡ECAHFisonekindofmicrostructuredoptical矗berwi也anellipticalce施alairholcan

4、dadepressedinnercladding，whichrefiacdonindexislowermanmeoutercladding，itisanovelSPSMfiberwithsomeexccllempropenies．Theellip廿calcemralairholeis血ekeycomponemofsuchsinglepol撕zationsin百emodeECAHF．AfewkiIldsofhighbire衔ngentfibers，a11dmemodalbirefringenceofthe矗md锄entalmodes(usuallyoVer10-j)aredi

5、scussed．somepropeniesoftheSPSMECAHF，suchasmesinglemodeoper“on，themodalbirefringenceoftllefhd锄emalmode，t}leballd州dmofSPSM，areinvestigatedindetailbynumericalcomputations．T订odalbirefringenceofthe胁d锄entalmodeinmeSPSMECAHFcaIl印proachto4×10一，WhichisoVeroneorderofmagmtude王ligherⅡlanthatintheconve

6、ntionalellipticaI—corcPMF．TheSPSMbandwidthofsuchECAHFisnmchgreaterthansomeconventionalPMfibers．Thelong-periodgratings(LPG)inscribedinMOFsarediscussedinthisthesis，includingthetrallsmissionpropeniesofmeLPGandthedependenceonthefiberstnlcturepammetcrS．SomeapplicationsoftlleSPSMfibersareshownmm

7、elastsection，especiallyinsOmepolarization-sensitivedevices，suchaSthefiberg”oandDolarizationcomroller．Keyword：Sin出ep01arizationsinglemode，micmstmctureopticalfiber，photoniccrystal矗ber，m曲biremn誊mce，optical矗bersensing北京交通大学硕上学位论立第一章绪论近年来，对于单模单偏振光纤(sPsM)的研究越来越多。由于单