锥型塑料光纤的光传输特性及其应用研究

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1、华侨大学硕士学位论文锥型塑料光纤的光传输特性及其应用研究姓名：连重炎申请学位级别：硕士专业：光学指导教师：庄其仁20071201华侨大学硕士学位论文：锥型塑料光纤的光传输特性及其应用研究实验发现，锥形塑料光纤对于提高光束的耦合效率具有良好的效果。关键词：塑料光纤；锥形光纤；光线追迹法；耦合效率；远场特性IV华侨大学硕士学位论文：锥型塑料光纤的光传输特性及其应用研究ABSTRACTTheplasticopticalfiber(POF)havemanyadvantageinshortdistancecommunication,

2、suchasfineflexibility,easy-connecting,lowcostandsoon.Inthefieldofsensing,comparedwiththesilicaopticalfiber(SOF),thePOFshavehighersensitivityandbiggermeasurementrange.Sotheplasticopticalfiberisbeingpaidmoreandmoreattentionandithasthequiteconsiderablepotentialmarket

3、andtheapplicationprospect.Thispaperstudiesonthetheoryofmodecouplingandpowerflowequationofplasticopticalfiberwaveguide.Raytracingmethodofplasticopticalfiberissimplyintroducedandsimulated.Basedontheraytracingmethodofgeometricoptics,thepropagationpropertyofraysintape

4、redplasticfiberisanalyzedandsimulated.Themeridianrayandtheskewraypropagationformulafortaperedplasticfiberisderived.Theresultshowsthatitisappropriatetouseasmallertaperanglewhenthetaperedplasticopticalfiberisusedascollimation.Theexperimentoflarge-coreplasticopticalf

5、iberthermalpre-elongatedtaperisintroduced.Throughexperimentrepeatedly,thepaperproposedthegoodparameterofplasticopticalfiberthermalpre-elongatedtaper,andgavesometestandanalysisonthethermalpre-elongatedtaperedplasticopticalfiber.Thefar-fieldcharacteristicswhenLDgoes

6、throughtelescopesystem、multi-modefibersystemandtaperedplasticopticalfibersystemarestudied.Thetelescopesystemhasgoodbeamcollimation,andthefar-fieldbeamappearsringshapefordiffraction.Multi-modefibersystemhasthecharacteristicofmodeldispersionwhichmakesthecomplexspati

7、alcoherencelessandthelightbeamuniformityincreased.Withbothcharacteristics,taperedplasticopticalfibersystemmakesthelighthavepartialcoherenceandreducesthebeamdivergenceangle,whichmakesthelightqualitythebest.Informationiscarriedbylightbeamfromlightsourcesinopticalfib

8、ercommunication.Themostcommonlightsourcesaresemiconductorlaserandlightemittingdiode.Inthelastchapter,theresearchoncouplingbetweenLEDV华侨大学硕士学位论文：锥型塑料光纤的光