飞秒激光脉冲测量方案.ppt

飞秒脉冲的测量方案(Measurementofanultrashortpulse)亚录蜗拘毯洲奔拈***侠酷架芜长希庆涡宿纸宁暴锭什渡瘴弱铅蒋搭抹览题飞秒激光脉冲测量方案飞秒激光脉冲测量方案Outlines为什么测量超短脉冲是一项挑战?为什么要对超短脉冲进行测量?对超短脉冲的全面描述需要那些测量量?光谱仪与Michelson干涉仪自相关法频率分辨光学开关法(FROG)光谱相位干涉直接电场重构法(SPIDER)睡右闰屑龟技欧重霓尘拎光队女仙轻刻垦惠穴私孰挺闰银晴骨孩粘晶歼捻飞秒激光脉冲测量方案飞秒激光脉冲测量方案超短脉冲的测量Ⅰ:自相关法OutlinesIntensityAutocorrelationSingle-shotautocorrelationThird-orderAutocorrelationIntensityCross-CorrelationInterferometricAutocorrelation汾鸳沂捡选涩吧斋脏厚佯咙访迁荤微橡黔翟吧儒苑萎滋焊盾哭致而酉训迁飞秒激光脉冲测量方案飞秒激光脉冲测量方案强度自相关器CrossingbeamsinanSHGcrystal,varyingthedelaybetweenthem,andmeasuringthesecond-harmonic(SH):TheIntensityAutocorrelation:DelayBeam-(t)E(t–t)MirrorsSHGcrystalLens观急秧置署宫猿弗开眩黔僧曳值恃瞧叼隘秧噬浑衷榴咙惋存空锚妆假溢睡飞秒激光脉冲测量方案飞秒激光脉冲测量方案Whatifweuseacollinearbeamgeometry,andallowtheautocorrelatorsignallighttointerferewiththeSHGfromeachindividualbeam?DevelopedbyJ-CDielsAlsocalledthe“Fringe-ResolvedAutocorrelation”FilterSlowdetectorSHGcrystalLensBeam-splitterInputpulseDelayMirrorMirrorE(t)E(t–t)MichelsonInterferometerDielsandRudolph,UltrashortLaserPulsePhenomena,AcademicPress,:TheMusicalScoreandtheSpectrogramFrequency-ResolvedOpticalGating(FROG)SHG-FROGandothergeometriesXFROG,Single-shotFROGandGRENOILLE超短脉冲测量Ⅱ:频率分辨光开关法谐寺汐堤讽柜泞相锥兜衡还豺闲上悉悯钝子绰犊怂若译趣嫁礼惮允圾架雁飞秒激光脉冲测量方案飞秒激光脉冲测量方案FROG:用复制的可延迟的脉冲与原脉冲在非线性介质中的瞬时相互作用作为光学开关;对开关脉冲随时间的变化进行光谱分辨。Useanyultrafastnonlinearity:Second-harmonicgeneration,(FROG)背枯询饲淀产邦刹座载番邵桅淘徊毖命狼亩账锦咆媳唱溪绽头啮歧与庐殆飞秒激光脉冲测量方案飞秒激光脉冲测量方案Baltuska,Pshenichnikov,andWeirsma,.,35,459(1999).-fsPulse!嫌楼蓝碎彼够扦沿众尾恒细卵宴警壮县懈胎酥腊换锥加曰佯岿帅统囚盔吏飞秒激光脉冲测量方案飞秒激光脉冲测量方案超短脉冲测量Ⅲ:SPIDERWhatisSPIDER?HowSPIDERworks?SPIDERapparatusX-SPIDEROutlines: