简介:Diode-pumpedpassivelyQ-switchedNd:GdVO4/Cr4+:YAGlaserswithasimpleflat-flatcavityweredemonstrated.Themaximumaverageoutputpowerat1.06μmwas1.25W.Thehighestpeakpowerandpulseenergywere7.56kWand75μJ,respectively,withthepulserepetitionrateof11.1kHzandpulsewidthof10nsattheincidentpumppowerof8W.
简介:Thecavitytuningcharacteristicsoforthogonallypolarizeddual-frequencyHe-Nelaserat1.15μmarepresented.Vectorial-extensionmodelbasedonsemi-classicallasertheoryrevealsthatcavitytuningcharacteristicsarerelatedtobeatfrequency,relativeexcitation,andtypeofNeisotope.Distortionsofcavitytuningcurvesbecomemoderatewiththeincreaseofbeatfrequencybecauseoftheweakeningofthecrosssaturationeffect.Distortionsareenhancedwiththeincreaseofrelativeexcitationbecauseofthecombinedactionoftheself-saturationandcross-saturationeffects.Byadoptingdual-isotopeNeinsteadofmonoiso-toplicNe,distortionsarereducedbecauseofthemisalignmentbetweenpeaksoftheself-saturationandnetgaincoefficients.Thetheoreticalcalculationsareingoodagreementwiththecorrespondingexperimentalresults.
简介:Er~(3+)-dopedphosphor-telluriteglassforbroadbandshort-lengthEr~(3+)-dopedfiberamplifier(EDFA)isfabricatedandcharacterized.Thedifferentialvalue(△T)ofonsetcrystallinetemperature(T_x)andglasstransitiontemperature(T_g)is206°C.ThestimulatedemissioncrosssectionofEr~(a+)iscalculatedfromab-sorptionspectrumbyMcCumbertheoryandis0.87×10~(-20)cm~2at1532nm.Abroad1.5-μmfluorescencespectrumwith54-nmfull-widthathalfmaximum(FWHM)isdemonstrated.Especially,themaximumphononenergyofundopedphosphor-telluriteglassis1100cm~(-1),whichrestrictstheupconversionlumines-cence.Itispossibletopumpefficientlyat980nm.TheseresultsindicateEr~(3+)-dopedphosphor-telluriteglassissuitableforfabricatingbroadbandshort-lengthEDFA.
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