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1、暨南大学硕士学位论文ABSTRACTMicrofiberisakindofopticalfiberwhichisfabricatedbyflame/laser-heatedtaperdrawingmethodfromstandardsinglemodefiber.Itpossessesapparentadvantagesinopticalandmechanicalapplicationsovertraditionalopticalfibers,includingtightlightconfinement,intrinsicevanescentfieldandcompactness.Photo
2、nicdeviceswithcompactsizescanbeimplementedbybending,twisting,coilingandassemblingmicrofibersinfreespace.Furthermore,byconnectingthemicrofiberdevices,wecouldpotentiallypromotethefurtherdevelopmentofintegratedmicrophotonicplatformswithcomplexopticalstructures.Hence,animportantproblemneededtobesolvedi
3、slow-losssplicingbetweenmicrofibersandefficientassemblingofmicrofiberdevices,sincethepresentmethodshavedifferentlimitationssuchashighsplicing-loss,complicatedoperationsandlowmechanicalstrength.Inthisthesis,weproposealow-losssplicingmethodwithhighmechanicalstrengthbasedonhigh-substitutedhydroxypropy
4、lcellulose（H-HPC）,whichispolymermaterialwithalowrefractiveindex,andwealsoapplyittomanufacturedifferentmicrofiberdevices.Themaincontentofthethesisisasfollows:Inthefirstpart,theevanescentcouplingsbetweenparallelmicrofibersareanalyzedwithweakandstrongwaveguideapproximations,respectively.TheH-HPCfilmco
5、atedonthesurfaceofmicrofibersredistributesthemodefieldspropagatingalongthefiberwhenmaintainingtheindexguidance,whichmeanstheevanescentfieldsbetweentwoparallelmicrofibershavebeenenhancedtoincreasethecouplingefficiencytoimprovethecouplingstrength.Thispartofworkprovidesthetheoryoflow-losssplicingmicro
6、fibersandassemblingthemicrofiberdevices.Inthesecondpart,weproposealow-losssplicingmethodbaseonhigh-substitutedhydroxypropylcellulose(H-HPC).Bydelicatelychoosingthematerialandoptimizingtherelevantparameters,wedesignacompletetechniqueprocess.Theminimalaveragelossis~0.26dBandthejointsegmentcanstandana
7、xialstressupto~1N.（III）万方数据暨南大学硕士学位论文Inthethirdpart,theH-HPC-coatingsplicingmethodisemployedtoassemblemicrofiberdevicesincludingcoilresonator,Sagnacinterferometer,F-PresonatorandMach-Zehnderinterferometer.A
