简介：Thedispersioncompensationpropertiesofdual-concentriccorephotoniccrystalfibersaretheoreticallyinvestigatedinthisletter.Theeffectsofgeometricstructureonthedispersionpropertiesofdual-concentriccorephotoniccrystalfibersarecarefullystudiedbyfiniteelementmethod.Thefirstlayerofholesaroundthecoreareaisenlargedinanewmannerwiththenear-corepointfixed.Consideringthetradeoffamongseveralparameters,resultsshowthatthedispersioncompensationwavelengthandstrengthcanbetunedtodesiredvaluesbyconstructinganappropriatedesignofthegeometricstructureofphotoniccrystalfibers.

简介：

简介：Weproduceamaximum1.45Wlaseroutputat1064nmusinganeodymium-dopedsilicateglassfiberthathasarectangularcorewithdimensionsof~6.3μm×31.5μm.Themeasureddivergenceanglesoftheoutputlaserintwodimensionsare3.22°and1.76°,respectively.Theoutputpowerisstableandlimitedonlybytheavailablepumppower.

简介：Photoniccrystalfibers(PCFs)withasteppedraised-coreprofileandonelayerequallyspacedholesinthecladdingareanalyzed.Usingeffectiveindexmethodandconsideringaraisedsteprefractiveindexdifferencebetweentheindexofthecoreandtheeffectiveindexofthecladding,weimprovethecharacteristicparameterssuchasnumericalapertureandV-parameter,andreduceitsbendinglosstoaboutonetenthofaconventionalPCF.ImplementingsuchastructureinPCFsmaybeonestepforwardtoachievelowlossPCFsforcommunicationapplications.

简介：