Propagation of high-power fiber laser with high-order-mode content-中国期刊网

摘要 Propagationpropertiesofhigh-powerfiberlaserwithhigh-order-mode(HOM)contentarestudiednumericallyforthefirsttimetothebestofourknowledge.TheeffectofHOMonthepropagationpropertyisevaluatedbythepowerinthebucket(PIB)metric.ItisshownthatPIBismainlydependentonHOMcontentratherthantherelativephasebetweenthefundamentalmodeandHOM.ThePIBinvacuumismorethan80%whenthepowerfractionoftheHOMiscontrolledtobelessthan50%at5km.Therelativephasehasanimpactonthepeakintensitypositionandconcentrationofthefar-fieldintensitydistribution.Ifanadaptiveopticssystemisusedtocorrectthepeakintensitydeviation,theresultsindicatethatthereexistsamaximalvalueofPIBasrelativephaseincreases.Sucheffectisweakenedwhenpropagatinginturbulence.ComparedtothelaserbeamswithoutHOM,laserbeamswithHOMcontentarelessinfluencedbytheturbulenceandcanreduceaverageintensityfluctuation.Theresultsmaybeusefulinthedesignofahigh-powerfiberlasersystem.

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Propagation of high-power fiber laser with high-order-mode content

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Propagation of high-power fiber laser with high-order-mode content

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