简介:TheeffectsofF^-ionsinagermanium-lead-telluriteglasssystemonthespectralandpotentiallaserpropertiesoftheYb^3+areinvestigated.Theabsorptionspectra,lifetimes,theemissioncross-sectionsandtheminimumpumpintensitiesoftheglasssystemwithandwithoutF^-ionshavebeenmeasuredandcalculated.TheresultsshowthatthefluorescencelifetimeandtheminimumpumpintensityofYb^3+ionsincreaseevidently,whichindicatesthatgermanium-lead-oxyfluoridetelluriteglassisapromisinglaserhostmatrixforhighpowergeneration.FT-IRspectrawereusedtoanalysetheeffectofF^-ionsonOH^-groupsinthisglasssystem.AnalysisdemonstratesthatadditionoffluorideremovestheOH^-groupsandresultsinimprovementoffluorescencelifetimeofYb^3+.
简介:§1.IntroductionLetEbeanon-zerocomplexBanaohspace,&(JET)theBanaohalgebraofalltheoperatorsfromEintoitself.Operatormeans'boundedlinearoperator'throughout.Anoperatorfunction/fromadomain(openset)Dinthecomplexplaneto@l(T£}issaidtobeanalytic,ifforanyx^Eandq>£E*(thedualspaceofE\9>(/(z)aOisanalyticintheclassical’senseinD([1],p.92).Wedenotebyja/B(D)thesetofalltheanalyticoperatorfunctionsfromDinto
简介:Thefluorineionsensitivefield-effecttransistor(F--ISFET)ismadebydepositingverythinLaF3filmongridoffield-effecttransistorwithsputtermethod.Theoperatingprinciple,measuringmethodandmeasuredresultsofF--ISFETaregiven.Themeasuredresultsshowthatthiskindofsensorhashighersensitivity,shorterresponsetimeandbetterlinearity.Onthebasisofexperimentalresults,thefactorofinfluencingthesteadinessandrepeatabilityofF--ISFETareconjectured.