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飞秒激光脉冲在氮气中产生高次谐波的实验研究
引用本文:陈建新,夏元钦,姚琴,王骐.飞秒激光脉冲在氮气中产生高次谐波的实验研究[J].光学学报,2002,22(6):50-653.
作者姓名:陈建新  夏元钦  姚琴  王骐
作者单位:哈尔滨工业大学光电子技术研究所可调谐激光技术国家级重点实验室,哈尔滨,150001
基金项目:国家科委 86 3高技术计划激光技术主题资助课题
摘    要:报道了以氮气为介质产生高次谐波的实验结果。实验中主要研究了不同的气体密度、不同入射激光能量和不同偏振对高次谐波辐射强度及谐波级次的影响。并从理论上进行了定性分析。分析结果表明:要想得到较高次、较强的谐波辐射,必须反复进行实验,确定最佳的激光能量和气体密度,以减少由于自由电子密度的提高而导致的相位失配的影响。

关 键 词:飞秒激光脉冲  实验研究  高次谐波  氮气  气体密度  入射激光能量  相互作用  激光器

High Harmonic Generation in N2 Using Intense fs Laser Pulses
Chen Jianxin,Xia Yuanqin,Yao Qin,Wang Qi.High Harmonic Generation in N2 Using Intense fs Laser Pulses[J].Acta Optica Sinica,2002,22(6):50-653.
Authors:Chen Jianxin  Xia Yuanqin  Yao Qin  Wang Qi
Abstract:The experimental results of high order harmonic generation in diatomic molecular N 2 are presented. The effects of different gas density, different laser energy and different laser polarization on harmonic emission and harmonic order are mainly studied in the experiment. At the same time, the results are analyzed theoretically. It is indicated that the confirmation of the optimal gas density and the incident laser energy are needed in order to get the stronger harmonic emission and to avoid the phase mismatch caused by density increasing of the free electrons.
Keywords:high  order  harmonic generation  diatomic molecular N  2  gas densities  incident laser energy
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