摻鐵鈮酸鋰晶體中光寫入三維波導的實驗研究.pdf

1、學校代碼：10699學號：036174147西北工業(yè)大學碩士學位論文(學位研究生)題目：摻鐵鈮酸鋰晶體中光寫入三維波導的實驗研究指導教師：趙建撻專業(yè)技術職稱：數(shù)援答辯日期：2QQ魚：Q三學位授予時間：——二零零六年三月一奄奄／、，平二月柏北j業(yè)人學碩士學位論文II!!!=!!!!!!!!!!!!!!!!!!!!!!=!!!!!=!!!!!!!!!!!!!=!===目=bE===!!!!!=％一ExperimentalInvestigat

2、ionsonPhoto—written3DWaveguidesinIron—dopedLithiumNiobateCrystals古AbstractOpticalwaveguideisthebasicelementofallopticalintegratedsystem，anditisplayinganimportantroleintheapplicationsofopticalcomputations，opticaldynamicin

3、terconnectionsandinformationprocessingProtonexchange，ionimplanting，andetchingaresometraditionalwaveguidefabricationtechniquesinatwodimensionaJplalle，ButaljofthesemethodsarecomplicatedintechnicsRecently，1ight—inductionmet

4、hodsattractmuchresearchinterestInthisthesisthreemethodstoform3Dwaveguidestructuresinlithiumniobate(LiNb03)crystals，includinglasermicromachining，structure—lightilluninating，andphotovoltaicspatialopticalsolitoninductiontec

5、hniqueareinvestigatedexperimentallyindetailThemainworkiSasfollows：(1)Bysolvingthephotorefractivedynamicequations，theoptimalintervalsforwaveguidefabricationsjnLiNbO，crystalarenumericallyspecifiedwhenthefocused1aserbeamssc

6、analongditierentdirections，CurvedandybrancheswaveguidesareexperimentallyformedinanirondopedLiNb03crystalThenearfieldpatternandtheresultsoftheguidingtestsshowthatthewaveguidearesuccessfullyfabricated(2)IndexchangesinLiNb0

7、3crystalsinducedbywritingbeamswithdifferentintensityprofilesaretheoreticallyanalyzedandnumericallysimulatedFortheouedimensionalcases，analyticrelationsbetweentheintensityprofilesofwritmgbeamsandtheindexdistributionsareobt

8、ainedWhileforthetwo—dimensionalcases，numericalsolutionmethodsareemployedtoobtaintheintensityprofilesofthewritingbeamscorrespondingtothedesiredindexchangeswithdistributionsofgaussian，squarelaworringtypeTheseareexperimenta

9、llydemonstratedinalljrondopedLiNb03crystal(3)Fabricatinga22lightcoupleremployingstructurelightsformedbyabinaryopticalmaskisinvestigatedexperimentallyinanirondopedLiNb03crystalMachZehnderwaveguideemployingstructurelightsf

10、ormedbyallLCLVisobtainedinanirondopedLiNb03crystal，(4)Formationsof1Ddarkphotovoltaicspatialopticalsolitonsarenumericallysimulatedandexperimentallydemonstatedina玎irondopedLiNb03crystalPlanar拉branchesandchannelwaveguidesar

11、esuccessfullyfabricatedinLiNb03：Fecrystalbyintroducingphaseperturbationsandamplitudeperturbationsinuniformincidentbeams，respectivelyKeyword：irondopedLiNb03crystal，3Dopticalwaveguides，lasermicromaching，structure—lightsill

12、uminating，spatialopticalsolitonsNationalNaturalScienceFoundationofChina(GrantNo60077018)，theYouthforNorthwesternPolytechnicalUniversity(NPU)TeachersScientificandTechnological[nllovationFoundation，theDoctorateFoundationof