Embedded whispering-gallery mode microsphere resonator in a tapered hollow annular core fiber-中国期刊网

摘要 Weproposeanddemonstrateataperedhollowannularcorefiber(HACF)couplerforexcitationofwhisperinggallerymodes(WGMs)ofanembeddedmicrosphereresonator.ThecouplerissimplyfabricatedbyfusionsplicingofasegmentofHACFwiththesingle-modefiber(SMF),andthenimprovedbytaperingthesplicingjointtoreducethecone-apexangle.Therefore,thecouplingefficiencyfromtheSMFtotheHACFisenhancedtoexcitevariousWGMsviaevanescentfieldcoupling.Normalpositive,negativesymmetricalLorentzianandasymmetricFanolineshapescanbeobtainedbyvaryingtheresonatorsizeandlocation.AnotherinterestingphenomenonisobservedthatahigherQ-factormodeinalowerQ-factormodehasacontrastashighas58.Temperaturesensingwithgoodstabilityisalsodemonstrated.ThisembeddedWGMmicrosphereresonatorinthetaperedHACFisexpectedtopromoteenvironmentaladaptabilityinpracticalapplicationsduetoitssimplicityandrobustness.

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Embedded whispering-gallery mode microsphere resonator in a tapered hollow annular core fiber

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Embedded whispering-gallery mode microsphere resonator in a tapered hollow annular core fiber

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