All-fiber acousto-optic modulator based on a cladding-etched optical fiber for active mode-locking-中国期刊网

摘要 Anall-fiberacousto-opticmodulator（AOM）,whichfeaturesacompactstructureandalow-drivingvoltage,isexperimentallydemonstratedfortheactivemode-lockingofafiberlaser.TheproposedAOMisbasedontheshortlengthofthecladding-etchedfiber,theendsofwhicharefixedonaslideglass.Ontopofthecladding-etchedfiber,apiezoelectrictransducerwasoverlaid.Achemicalwet-etchingtechnique,whichisbasedonamixedsolutionofNH4Fand（NH4）2SO4,isusedtoreducethefiberdiameterdownto～25μm,andthelengthoftheetchedsectionisonly0.5cm.Thefabricateddeviceexhibitedamodulationdepthof73.10%atanacousticfrequencyof918.9kHzandapeak-to-peakelectricalvoltageof10V,whilealaserbeamwascoupledat1560nm.ByusingthepreparedAOMwithinanerbium-doped-fiberringcavity,themode-lockedpulseswithatemporalwidthof2.66pswerereadilyobtainedatarepetitionrateof1.838MHz.

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All-fiber acousto-optic modulator based on a cladding-etched optical fiber for active mode-locking

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All-fiber acousto-optic modulator based on a cladding-etched optical fiber for active mode-locking

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