简介:WedemonstratethegenerationofQ-switchedpulsesfromanytterbium-dopedfiberlaser(YDFL)usingquantumdot(QD)CdSeasapassivesaturableabsorber(SA).TheCdSeQDisfabricatedbythesynthesisofCdO,Se,andmanganeseacetateandparaffinoilandoleicacidasthesolventandsurfactant,respectively.TheCdSeQDisthendopedintopoly-methyl-methacrylate(PMMA)viaanemulsionpolymerizationprocess.APMMAhostedCdSeQDthinflakewithahomogeneousendsurfaceisthenformedandplacedbetweentwoferrulesandassembledinaYDFLcavitytoachievetheQ-switchingoperationwitharepetitionrateof24.45to40.50kHzwhilevaryingthepumppowerfrom975to1196mW.Thepulsewidthchangesfrom6.78to3.65μswithamaximumcalculatedpulseenergyat0.77μJatapumppowerof1101mW.ThisworkmaybethefirstdemonstrationofCdSeQD-basedQ-switchinginanall-fiberconfigurationthatshouldgiveproportionalinsightintosemiconductorQDmaterialsinphotonicsapplications.
简介:Adiode-end-pumpedelectro-optic(EO)Q-switchedgreenlaseroperatingattherepetitionrateof20kHzisreported.AblockofLa_3Ga_5SiO_(14)(LGS)singlecrystalisusedasaQ-switchandthetypeⅠphase-matchingLiB_3O_5(LBO)isusedasthenonlinearcrystalinthesecondharmonicgeneration.The2.3-Waveragepowerof532-nmgreenlaserisobtainedattherepetitionrateof20kHzwiththepulsewidthasshortas10ns.Whentheoutputpowerisabout1.5W,themeasuredpowerfluctuationislessthan1.4%(root-mean-square,RMS)withthebeamqualityfactorofM~2<2inbothorthogonaldirections.