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1、Modelingoftheinducedrefractiveindexkineticsinphoto-thermo-refractiveglass1,2,*1JulienLumeauandLeonidB.Glebov1CREOL,TheCollegeofOpticsandPhotonics,UniversityofCentralFlorida,P.O.Box162700,Orlando,Florida32816-2700,USA2InstitutFRESNEL,CNRS,Aix-MarseilleUniversité,EcoleCentraleMar
2、seille,CampusdeStJérôme,13013Marseille,France*jlumeau@creol.ucf.eduAbstract:Photo-thermo-refractive(PTR)glassisaphotosensitivemulti-componentsilicateglassthatexhibitsrefractiveindexchangeaftersuccessiveUV-exposureandthermaltreatment.Therefractiveindexchangewasdemonstratedtobeas
3、sociatedwiththeprecipitationofNaFnano-crystalsintheglassmatrix.ThispaperpresentsasystematicstudyofthedependenceoftherefractiveindexchangeondosageofUV-exposureandthermaltreatmentdurationandtemperatureinalreadyUV-exposedandnucleatedsamples.ItisshownusingAvramiplotsthattherefracti
4、veindexchangeinPTRglassisdeterminedbyadiffusion-controlledgrowthofparticlesfrompre-existingnucleiwhileallcoefficientshaveexponentialdependenceontemperature(Boltzmannlaw).Thedevelopedmodel,whichincludesbothphoto-chemistryandcrystallizationprocesses,allowdescribingtherefractivein
5、dexchangedependenceondosageforawiderangeofthermaltreatmentdurationandtemperatureandanaccuracybetterthan10%.©2012OpticalSocietyofAmericaOCIScodes:(160.4760)Opticalproperties;(160.5335)Photosensitivematerials;(350.5130)Photochemistry.Referencesandlinks1.S.D.Stookey,“Photosensitiv
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7、.C.Richardson,andV.I.Smirnov,“High-efficiencyBragggratingsinphotothermorefractiveglass,”Appl.Opt.38(4),619–627(1999).4.O.M.Efimov,L.B.Glebov,S.Papernov,andA.W.Schmid,“Laser-induceddamageofphoto-thermo-refractiveglassesforoptical-holographic-elementwriting,”Proc.SPIE3578,564–575
8、(1999).5.O.M.Efimov,L.B.Glebov,andV.I.Smirnov,“High-fr
