简介:Ultrashortpulsesweregeneratedinpassivelymode-lockedNd:YAGandNd:GdVO4laserspumpedbyapulsedlaserdiodewith10-Hzrepetitionrate.Stablemode-lockedpulsetrainswereproducedwiththepulsewidthof10ps.Theevolutionofthemode-lockedpulsewasobservedintheexperimentandwasdiscussedindetail.ComparingthepulseevolutionsofNd:YAGandNd:GdVO4lasers,wefoundthatthebuilduptimeofthesteady-statemode-lockingwithsemiconductorsaturableabsorbermirrors(SESAMs)wasrelevanttotheupper-statelifetimeandtheemissioncross-sectionofthegainmedium.
简介:ApassivelyQ-switchedNd3+:YAGlaserwithcornercubeistheoreticallyandexperimentallystudied.Weanalyzethepolarizationvariationincavityandsimulatethepeakpower,pulseenergyandpulsewidthchangedwiththerotationangleofcornercubenumerically.Anexperimentismadetoverifythetheoreticalresults.Withrotatingtheangleofcornercubeabouttheaxisthevariationrangeofpeakpoweris1.77MW(from10.36to8.59MW),andthatofpulseenergyis14.9mJ(from159.5to174.4mJ),thefluctuationofpulsewidthis2.95ns.Theexperimentalresultsagreewiththetheoreticalanalysistotheextentofvariationrules.Themostdynamictostaticenergyratioof62.5%isachieved.
简介:Ahigh-repetitionratemasteroscillatorpoweramplifierpumpedwithlaserdiodes(LDs)isreported.Aninjectionseedingsingle-frequencyelectro-opticalQ-switchedNd:YAGlaserisusedasanoscillator,andaconductivelycooledNd:YAGzigzagslabwithabounce-pumpedarchitectureisutilizedasapoweramplifier.Pulseenergiesofover800mJat1064nmand400mJat532nm,correspondingtoaveragepowersof200and100W,respectively,areachievedwitha12.6-nspulsewidthat250Hz.Outputfrequencyfluctuationsandsingle-frequencyoperationarefurthermonitored.Experimentalresultsrevealthattheproposedsystem,whichfeaturesasingle-passamplifiedconfiguration,isapromisingdesignforspace-basedapplications.
简介:Diode-pumpedpassivelyQ-switchedNd:GdVO4/Cr4+:YAGlaserswithasimpleflat-flatcavityweredemonstrated.Themaximumaverageoutputpowerat1.06μmwas1.25W.Thehighestpeakpowerandpulseenergywere7.56kWand75μJ,respectively,withthepulserepetitionrateof11.1kHzandpulsewidthof10nsattheincidentpumppowerof8W.
简介:Ahigh-repetition-rateeye-safeopticalparametricoscillator(OPO),usinganon-criticallyphase-matchedKTPcrystalintracavitypumpedbyapassivelyQ-switchedNd:GdVO_4/Cr~(4+):YAGlaser,isexperimentallydemonstrated.Theconversionefficiencyfortheaveragepoweris7%frompumpdiodeinputtoOPOsignaloutputandtheslopeefficiencyisupto10.3%.Withanincidentpumppowerof7.3W,thecompactintracavityOPO(IOPO)cavity,operatingat15kHz,producesanaveragepowerof0.57Wat1570nmwithapulsewidthasshortas6ns.Thepeakpowerat1570nmishigherthan6.3kW.
简介:Toobtainhighpower589-nmyellowlaser,aT-shapedthermal-insensitivecavityisdesigned.Theoptimalpowerratioof1064-and1319-nmbeamsisconsideredandthefundamentalspotsizedistributionfromtheoutputmirrortothetwolaserrodsarecalculatedandsimulated,respectively.Asaresult,a589-nmyellowlaserwiththeaverageoutputpowerof5.7Wisobtainedintheexperimentwhenthetotalpumpingpoweris695W.Theoptical-to-opticalconversionefficiencyfromthefundamentalwavestothesumfrequencygenerationisabout15.2%andthepulsewidthis150nsattherepetitionrateof18kHz.Theinstabilityoftheyellowlaserisalsomeasured,whichislessthan2%within3h.ThebeamqualityfactorsareM_x~2=4.96andM_v~2=5.08.
简介:在LD端面抽运的Nd:YVO4激光器中插入Cr^4+:YAG晶体,获得了稳定的1.06μm波长的高重复率被动调Q脉冲激光输出。实验研究了抽运功率、腔长、输出镜透过率对输出功率的影响,以及不同抽运功率下脉冲重复频率和脉冲宽度的变化,并对结果进行了理论分析。当腔长为8cm,抽运功率为27W时,得到重复率37.8kHz、平均功率3.5W的调Q脉冲序列;单个脉冲能量为93μJ、脉宽为24ns、峰值功率为3.9kW。
简介:Adiode-end-pumpedelectro-optic(EO)Q-switchedNd:YVO4laseroperatingatrepetitionrateof10kpps(pulsespersecond)wasreported.AblockofLa3Ga5SiO14(LGS)singlecrystalwasusedasaQ-switchandthedriverwasametaloxidesemiconductorfieldeffecttransistor(MOS-FET)pulserofhighrepetitionrateandhighvoltage.Atcontinuouswave(CW)operation,theslopeefficiencyofthelaserwas46%,andmaximumoptical-to-opticalefficiencywas38.5%.Usinganoutputcouplerwithtransmissionof70%,a10-kppsQ-switchedpulsetrainwith0.4-mJmonopulseenergyand8.2-nspulsewidthwasachieved,theopticalconversionefficiencywasaround15%,andthebeamqualityM2factorwaslessthan1.2.