利用準相位匹配參量過程實現(xiàn)1.55μm附近寬帶光源的研究

1、天津大學碩士學位論文利用準相位匹配參量過程實現(xiàn)1.55μm附近寬帶光源的研究姓名：禹國俊申請學位級別：碩士專業(yè)：物理電子學指導教師：姚建銓20031201天灃大學碩士論文天弗太謦AbstractInthisthesis，anewstylebroadbandlightsourcewastheoreticallyanalyzedandthepumpsourceofit，946nmNd：YAGquasi—three—levellasersys

2、temWasinvestigatedroundlyandthoroughlyBroadbandlightsourc圮hasveryextensiveandimportantapplicationsinmanyfieldssuchasopticalcommunication，opticalsensing，biomedicineandspectralanalysisQuasiphasematch(QPM)isoneofthenewmetho

3、dsthatcouldennablebroadbandsourceTheprincipletakenuseinthisprojectistheretracingbehaviorsofparametricoscillationtuningcurveWhenpumpingwithproperwavelengththeoutputwavelengthisverysensitivetothevariationofpoledperiodatthe

4、breakpointintheQPMtuningcurve，whichisclosetoinfinitythatis，thatpoledperiodcorrespondstoacertainrangeofoutputwavelengthsallofthatCanapproximatelymeetthephasematchconditionInthispapertheresearchworkandfindingsa化asfollows：1

5、ThedevelopementofbroadbandsourceFamiliarexampleswereenumeratedaswellastheadvantages，disadvantagesandapplicationofthemThenewbroadbandsourcebasedonQPMWasintroduced2Quasi—phase—matchtheorywasdiscussedindepthQPMcoupledequati

6、onsWaseducedfromMaxwellequationIntroductionoftheadvantagesofQPMandthekeycomponent，periodicallypoledcrystal3ThetheoryofQPMOPGbroadbandsonrcewasexploredindetailThepumpingwavelengthandspecificpoledperiodWasaccuratelychosenb

7、ynumericalcalculation4ThepumpingSOUrCeofQPMOPGLDlongitudinallypumped946nmNd：YAGlasersystemWastheoreticallystudiedandthethreshold，outputpowerandslopeefficientwerenumericallysimulatedTheconclusionsofOptimalcrystallengthand

8、optimalmodeoverlapwerederivedfromthecomputersimulation5Demonstrationof946umlaserwasconcludedAmaximumCWoutputpowerof14Wandslopeefficientof184％WasgotSomeprospectiveworkwasputforward，suchaspassivelyQ—switchedoperationof946n