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1、OpticalMaterials26(2004)347–350www.elsevier.com/locate/optmatPhotoluminescencepropertiesofNd:YVO4singlecrystalsbymulti-dieEFGmethoda,*bbba,cJ.W.Shur,V.V.Kochurikhin,A.E.Borisova,M.A.Ivanov,D.H.YoonaDepartmentofAdvancedMaterialEngineering,SungkyunkwanUniversity,Suwon440-746,SouthKoreabGeneral
2、PhysicsInstitute,Vavilovast.38,Moscow119991,RussianFederationcTheAdvancedMaterialsandProcessResearchCenterforITatSungkyunkwanUniversity,Suwon440-746,SouthKoreaReceived24July2003;accepted2December2003Availableonline19March2004AbstractNd-dopedYVO4crystalisanexcellentmaterialformakingthediode-p
3、umpedsolidlasers.Inthisstudy,Nd-dopedYVO4multi-crystalwithhighqualitywasgrownsimultaneouslybydevelopededge-definedfilm-fedgrowth(EFG)method.AllcrystalsappearedhomogenousNddistributionandwerefoundthestablestep-facetingphenomena.Theup-conversionpropertiesontheNd:YVO4multiple-crystalhavebeenmeasu
4、redbytheobservationsoftransmissionandphotoluminescence(PL)spectra.Ó2004ElsevierB.V.Allrightsreserved.Keywords:Nd-dopedYVO4multi-crystal;Edge-definedfilm-fedgrowth;Photoluminescencespectra1.Introductionapplicationsincludingmaterialprocessing,medicine,andremotesensing[5–7].Insolid-statelasermate
5、rialaportionoftheabsorbedRecently,attentionofinvestigatorswasmovedtoapumppowerislostintheformofheatduetonon-comparativelynovellaserNdactivemedium,aNd-radiativeprocesses.Theprimarymechanismisthedopedyttriumorthovanadate(Nd:YVO4)crystal,pos-inherentquantumdefect,whicharisesduetothedif-sessingo
6、fhighefficiency[8].Asignificantdealwaspaidferenceinenergybetweenthepumpandthelaserpho-tostudiesofpulsedregimesofoscillationofaNd:YVO4ton.Moreover,cross-relaxationandup-conversionlaser[9],enddiode-pumpedconfigurationsofthecavity,processescanalsogiverisetoheatingofthegainmed-opticalphase-conjugati
7、ngresonators[10,11],etc.Inium[1,2].Specially,incaseofdiode-pumpedsolid-statespiteofthementionedadvantage,aNd:YVO4crystallaserswherecrystalswithhighdopingconcentrationarehas,however,worsethermo-opticalpropertiescom-used,thecross-relaxationprocessesa
