Third Harmonic X-waves Generation by Filamentation of Infrared Femtosecond Laser Pulses in Air

被引：0
|
作者：
Xu, Han [1 ]
Xiong, Hui [1 ]
Chin, See Leang [2 ]
Cheng, Ya [1 ]
Xu, Zhizhan [1 ]
机构：
[1] Chinese Acad Sci, State Key Lab High Field Laser Phys, Shanghai Inst Opt & Fine Mech, POB 800211, Shanghai 201800, Peoples R China
[2] Univ Laval, Dept Phys, Quebec City, PQ G1K 7P4, Canada
来源：
ULTRAFAST PHENOMENA XVI | 2009年 / 92卷
基金：
中国国家自然科学基金;
关键词：
CONICAL EMISSION;
D O I：
暂无
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report the first measurement of the hyperbolic featured angularly resolved spectra of the X-shaped third harmonic generated in infrared femtosecond pulses pumped filament in air. We show that at low pump intensity, phase matching between the fundamental and third harmonic waves dominates the nonlinear optical effect and induces a ring structure of the third harmonic beam; whereas at high pump intensity, the dispersion properties of air begins to affect the angular spectrum, leading to the formation of nonlinear X-wave at third harmonic.
引用
收藏
页码：822 / +
页数：2
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