摘要
Extendingthelengthoffemtosecondlaserfilamentationhasalwaysbeendesiredforpracticalapplications.Here,wedemonstratethatsignificantextendingofasinglefilamentinBK7glasscanbeachievedbyconstructingphasenestedbeams.Thefilamentationandthefollowingenergyreplenishmentareassembledinasinglephase-nestedbeam.Thecentralpartofthephase-nestedbeamisanaperturedGaussianbeam,whichisfocusedintoonefocalspottoproduceashortfilament.Incontrast,therestoftheannularpartconvergesgraduallytowardsthecentralaxistocontinuouslyreplenishtheenergyforsupportingtheregenerationoffilaments.Thecommon-pathgeneratingsystemensuresthestabilityofgeneratedfilamentsandeasilyoptimizesthebeamparameterstoobtainthelongesthigh-qualityfilamentduetoitsflexibility.Inaddition,wediscussthesignificanceofcontinuousreplenishmentforextendingfilamentsandthepotentialforgeneratingmoreextendedfilamentsbasedonthismethod.
出版日期
2018年12月22日（中国期刊网平台首次上网日期，不代表论文的发表时间）
