摘要
Amethodtoevaluatedamageinopticalelementswiththenearfieldofanamplifiedspontaneousemission(ASE)beamhasbeendeveloped.Localpeakintensitiesaregenerallydistributedrandomlyinthenearfieldofalaserbeam.ThepartialcoherenceoftheASEsourceresultsinaverysmoothbeamprofile.ThecoherencetimeofASEismuchlessthanthepulsewidth.Small-scaleintensitymodulationscanbesmoothedoutrapidlywithinthetimeofapulsewidth.Intheexperiments,ASEisgeneratedfromamultifunctionalhigh-performanceNd:glasssystem,withapulsedurationof3ns,aspectralwidth(fullwidthathalfmaximum,FWHM)of1nmandanadjustableenergyrangefrom1to10J.ThedamagethresholdsofsamplesinducedbyASEaretwotothreetimeshigherthanthoseinducedbyalaserwiththesamesizeoftestspot.Furthermore,theASEbeamhasgreatpotentialforthedetectionofdefectsoveralargeareaandtheconditioningofopticalelements.
出版日期
2015年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
