光学超晶格的非线性光学效应分析与结构设计

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1、东!J『ij范大学帧}生#位论文关键词：光学超晶格，准相位匹配，倍频，PPLN—OPO，周期调谐，温度调谐接受带宽。分类号：0437Lb东帅范大学硕1哗位论文NonlinearOpticalEffectsInOpticalSuper-latticesAndDesignOfFrameOfOpticalSuper-latticesABSTRACTWiththedevelopmentofmodernOptics，moreandmorerequirementsaredemandedinLaser．Nonlinea卜frequenc

2、y—conversionisoneofthebestwaysinwideningwavelengthoflaser．0pticalsuper—latticesareakindofartificialnonlinearmaterials．itisusedinmanydomainssuchasfrequencydoubling，frequencytripling，opticalparameteroscillator．Opticalsuper-laticescouldprovidereciprocityvectorwhichca

3、llcompensatethephaselose．Opticalsuper—laaiceshassolYieadvantages—suchaSimprovingtheefficiencyoffrequencyconversion，makinguseofthebiggestnonlinearcoefficient．Therangeof丘equencyconversioncoversitswholetransparentwavelength．AnditCanbedesignedrandomlyrelyingonrequirem

4、ent．Anyinteractioncailbematchedwithoutwalkoffangleinopticalsuper-laRices．Opticalsuper-laticeshasbecomingahotpursuitofresearchrecentyearsbecauseofthespecialadvantages．Withthedevelopmentofthetechnologyofmakingopticalsuper-laaices，quasi-phase—matchingwasachievedinman

5、ymaterials．Opticalsuper-latticesisappliedinmoreandmorenonlinearopticalresearchareas．Thestmctureofitchangesfromonedirectiontotwodirections，fromsingleperiodtoquasi-period，eventomorecomplexstructure．Sothenonlineareffectsbecomemorecomplex．Analyzingthenonlineareffectsa

6、ndtheinfluencefornonlineareffectsbythemismatchoftheperiodareessentjal．Inthispaper,theprincipleofnonlineareffectinopticalsuper-latticesaredescribedsuchasfrequencydoubling，frequencytriplingandsamfrequency．Thespecialcharactersintheeffectsarealsostudied．Differentconst

7、ructionsofopticalsuper-laticesaredescribed．Inthisthesis，themaincontentsarefollowing：1．ReviewingthedevelopmentofConditionsofapplyingandstudyinginprincipleisintroducedwhichisusedinsuper-lattices．nonlinearopticalsuper—latticesmaterials；presentaredescribed．Quasi·phase

8、—matchperiodopticalsuper-laticesandaperiodic2．Everykindofnonlinearopticalcrystalsisintroducedpresently．Theoptical山东师范大学坝l：学位论丈charactersandotherparamete