摘要
Theemissionwavelengthofalaserisphysicallypredeterminedbythegainmediumused.Consequently,arbitrarywavelengthgenerationisafundamentalchallengeinthescienceoflight.Presentsolutionsincludeopticalparametricgeneration,requiringcomplexopticalsetupsandspectrallyslicedsupercontinuum,takingadvantageofasimplerfibertechnology:afixed-wavelengthpumplaserpulseisconvertedintoaspectrallyverybroadbandoutput,fromwhichtherequiredresultingwavelengthisthenopticallyfiltered.Unfortunately,thisprocessisassociatedwithaninherentlypoornoisefigure,whichoftenprecludesmanyrealisticapplicationsofsuchsupercontinuumsources.Here,weshowthatbyaddingonlyonepassiveopticalelement—ataperedphotoniccrystalfiber—toafixed-wavelengthfemtosecondlaser,onecaninaverysimplemannerresonantlyconvertthelaseremissionwavelengthintoanultra-wideandcontinuousrangeofdesiredwavelengths,withverylowinherentnoise,andwithoutmechanicalrealignmentofthelaser.Thisisachievedbyexploitingthedoubleinterplayofnonlinearityandchirpinthelasersourceandchirpandphasematchinginthetaperedfiber.Asafirstdemonstrationofthissimpleandinexpensivetechnology,wepresentafemtosecondfiberlasercontinuouslytunableacrosstheentirered–green–bluespectralrange.
出版日期
2017年06月16日（中国期刊网平台首次上网日期，不代表论文的发表时间）
