简介：WereportamonolithicTm:YLFmicrolaserinthisLetter.Inordertoimprovetherelaxationoscillationofthelaser,bothendsofthecrystalarecoated,makingtheTm:YLFcrystalitselfaresonantcavity.Themicrolaserispumpedbya792nmlaserdiodeoperatedinthecontinuouswave(CW)mode.Weobtainmaximumoutputpowersof7.78and10.4Watthetotalincidentpowerof43.6Wwithfocuslensesof37.5and40mm,respectively,correspondingtotheslopeefficienciesof25.6%and40.0%andtheoptical–opticalconversionefficienciesof17.8%and23.8%.Itisclearthattheamplitudeoftherelaxationoscillationissmallerandthebeamqualityisbetterwiththefocuslengthof37.5mm;however,thelaserwiththefocuslengthof40mmproducesahigheroutputpowerandamorestablewavelengthcenteringat1878.44nm.

简介：10月31日,埃克森美孚宣布在中国市场推出两款全新产品——美孚1号TM混合动力0W-20润滑油和美孚1号TM机油滤清器长效款,以更好地满足广大车主对品质驾乘体验的追求。美孚1号TM混合动力0W-20润滑油是埃克森美孚全球首次推出的专为混合动力车辆引擎打造的产品,拥有出色的抗磨清洁及抗油泥保护性能,在帮助改善燃油经济性的同时,使引擎历久如新。

简介：Aliquid-nitrogen-cooledTm,Ho:YLFlaserisconstructedwitha10-mm-longTm(6%)andHo(0.5%)co-dopedyttriumlithiumfluoridecrystalpumpedbyalaserdiodeoperatingat792nm.ThelaseroutputpowerisimprovedbycoolingtheTm,Ho:YLFcrystalfrom300to77K.Whenthecrystaliskeptat77K,thelaserthresholdpumppoweris230mW,theslopeefficiencyis27.4%,andthemaximumoptical-to-opticalefficiencyis19.9%.Atthesametime,therelationbetweentheinputpowerandtheoutputpoweratdifferenttemperaturesisobtained.

简介：自1996年被保时捷选为指定原厂灌装与保养推荐用油的美孚1号，双方合作至今已有19年的历史。不仅是量产车，在保时捷美孚1号超级杯赛车、国际保时捷卡雷拉杯赛车，以及保时捷RSSpyder等在内的多项顶级赛事赛车，也均采用美孚1号作为抗磨损专用润滑油。

简介：AhighlyTm-dopedleadgermanateglassfiberisdevelopedusingtherod-in-tubemethod.The~2μmlaserbeamqualityofthefiberis~1.5.Theleadgermanatecompositefiberjumpersarehomemadeforallthefiberlaserinvestigations.Whencoreispumpedbya1590nmYb/Erfiberlaser,amaximumlaseroutputof313mWisachievedata670mWpumppower,andthecorrespondingslopeefficiencyis~52.8%.Moreover,byusinga2cmlongleadgermanatefiberasthegainmedium,a33mW1942nmTmlaserisalsodemonstrated.

简介：Enhanced2.7μmemissionisobtainedinEr3+/Tm3+andEr3+/Ho3+codopedZBYAglasses.Absorptionandemissionspectraaretestedtocharacterizethe2.7μmemissionpropertiesofEr3+/Tm3+andEr3+/Ho3+dopedZBYAglassesandareasonableenergytransfermechanismof2.7μmemissionbetweenEr3+andTm3+Ho3+)ionisproposed.CodopingofTm3+orHo3+significantlyreducesthelifetimeoftheEr3+:4I13/2levelduetotheenergytransferofEr3+:4I13/2→Tm3+:3F4orEr3+:4I13/2→Ho3+:5I7.Thus,the2.7μmemissionisstrengthenedandthe1.5μmemissionisdecreasedaccordinglyespeciallyintheEr3+/Tm3+sample.TheupconversioneffectsbetweentheEr3+/Tm3+andEr3+/Ho3+dopedZBYAglassesaredifferentattributetothedifferentenergytransferefficiencies.Bothofthetwocodopedsamplespossessnearlyequallargeemissioncrosssection(16.6×10-21cm-2)around2.7μm.TheresultsindicatethatthisEr3+/Tm3+orEr3+/Ho3+dopedZBYAglasshaspotentialapplicationsin2.7μmlaser.

简介：Wedemonstrateadiode-pumpTm3+t-dopedall-fiberlaseroperatingat1908nmbasedonamasteroscillatorpoweramplifier（MOPA）configuration.Inourwork,152Woflaseroutputpowerisgeneratedbyatotalincidentpumppowerof434Wat790nm,correspondingtothetotalopticalefficiencyof35%.Thelaserwavelengthis1908.29nm.Tothebestofourknowledge,itisthehighestoutputpowerreachedaround1908nmwithsuchanarrowlinewidthof0.18nmbasedonaMOPAconfiguration.