稀土摻雜梯度折射率聚合物光纖的制備及梯度折射率形成機理研究.pdf

1、中國科學技術(shù)大學碩士學位論文稀土摻雜梯度折射率聚合物光纖的制備及梯度折射率形成機理研究姓名：張帆申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：張其錦2000.6.1中國科學技術(shù)大學碩士畢業(yè)論文AbstractAbstractPolymeropticalfibers(POF)havereceivedextensiveimerestduetotheirpotentialapplicationinopticalcommunicationi

2、nrecentyearsThisthesisisconcemedwiththreemajortopics：thepreparationandcharacterizationofrareearthoctanoate，preparationofrareearthdopedgradedindex(GI)POFandstudyofthemechanismofformingtheGIRareearthoctanoateweremadebynewm

3、ethodsThroughcharacterizationofIRspectrum，itcanbeconcludedthatthechelatedformationisthemaincomponentThechelatedrare—earthoctanoatesaremoresolubleinPMMAthenbridgedrare—earthoctanoateRare。earthdopedgradedindexpoly(methylme

4、thacrylate)(PMMA)preformshadbeenmadebyaninterracial—gelpolymerizationprocedure，inwhichpolymerizationwasperformedinaPMMAtubeandadopant。bromobenzene(BB)wasusedasahigherrefractiveindexmoleculeThegradedindexwasformedbythedif

5、fusionofthemoleculesThedistributionofindexinpreform，theinfluenceofrear—earthanddopedinertmoleculeconcentrationwerestudiedThepreformwasthendrawnintofibersundersuitableconditionsAndtheinfluentialfactorsfortheprocessofdrawi

6、ngwerealsostudiedAmodelofformingthegradedindexisestablishedbytheselfdiffusionapproachofthefree’volumetheoryThroughdescribingtheprocessofinterfacial—gelpolymerization，thedistributionofthepolymerconcentrationattheradicaldi

7、rectionofmetubewasassumedTheboundaryconditionsofthepolymerconcentrationwerediscussedinordertogetthesimulatingrefractiveindexdistributionoftheGIPOFpreformDiffusioncoefficientsofthemonomeranddopantwerecalculatedTheconcentr

8、ationdistributionsofthemoleculeswererelatedtotheirdiffusionco&ticientsrespectivelyUndertheseconditions，accordingtoLorentzandLorenzeformulationaquadraticdistributionofrefractiveindexontheradialdirectionofthepreformissimul