简介:Wepresenta940nmquasi-continuouswavesemiconductorlaserdesignedasabuildingblockforhigh-powerfibercoupledpumpmodules.Thelasercomprisesa400μmnarrow-stripearraymountedonanaluminumnitridesubstrateusinghardsolder.Thechiphasbeenoptimizedforhighopticalpowerandlowlateralfar-fieldangles.Twoverticalandsixlateralstructurevariationshavebeeninvestigatedtodeterminethebestachievableperformance.Operatingat1mspulsewidthandarepetitionrateof10Hz,thelaserdevicereachesamaximumpulsepowerof86Wfroma400μmapertureandmorethan62%maximumconversionefficiency.Lowlateralfar-fieldangles(95%powerenclosed)of11.5and13.5,dependingontheepitaxialdesign,enableefficientmultimodefibercoupling.Thepotentialforhighlyreliableapplicationshasbeendemonstrated.
简介:WedemonstrateamonolithicsinglefrequencyTm-dopedfiberamplifierwithoutputpowerof51.5W.Asinglefrequencyfiberlaserat1.97μmisamplifiedbyacascadedmasteroscillatorpoweramplifier(MOPA)systemwithall-fiberconfiguration.Theoptical-to-opticalconversionefficiencyofthemainfiberamplifieris45%.Noamplifiedspontaneousemission(ASE)orstimulatedBrillouinscattering(SBS)effectisobservedinthefiberamplifier.Theoutputpowercouldbefurtherscaledbylaunchingmorepumppower.