摘要
Highcoherenceofthelaserisindispensablelightsourcesinmodernlongorshort-distanceimagingsystems,becausethehighcoherenceleadstocoherentartifactssuchasspecklethatcorruptimageformation.Todeliverlowcoherencepulsesinfiberamplifiers,weutilizethesuperluminescentpulsedlightwithbroadbandwidth,nonlongitudinalmodestructureandchaoticmodephaseastheseedsourceofthecascadedfiberamplifiers.Theinfluenceoffibersuperluminescentpulseamplification(SPA)onthelimitationsoftheperformanceisanalyzed.AreviewofourresearchresultsforSPAinthefibersarepresent,includingthenonlineartheoriesofthislowcoherentlightsources,i.e.,self-focusing(SF),stimulatedRamanscattering(SRS)andself-phasemodulation(SPM)effects,andtheexperimentresultsofthenanosecondpulseswithpeakpowerashighas4.8MWandpulseenergyasmuchas55mJ.ToimprovethebrightnessofSPAlightinthefuturework,weintroduceournovelevaluationtermandamorereasonablecriterion,whichisdenotedbyanewparameterofbrightnessfactorforactivelargemodeareafiberdesigns.Acore-dopedactivelargepitchfiberwithacorediameterof190μmandamode-fielddiameterof180μmisdesignedbythismethod.Thedesignedfiberallowsneardiffractedlimitedbeamqualityoperation,anditcanachieve100mJpulseenergyand540Waveragepowerbyanalyzingthemodecouplingeffectsinducedbyheat.
出版日期
2016年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
