Conical emission and induced frequency shift of third-harmonic generation during ultrashort laser filamentation in air

被引：27
|
作者：
Theberge, F. [1 ]
Akoezbek, N.
Liu, W.
Filion, J.
Chin, S. L.
机构：
[1] Univ Laval, Dept Phys Genie Phys & Opt, Ste Foy, PQ G1K 7P4, Canada
[2] Univ Laval, Ctr Opt Photon & Laser, Ste Foy, PQ G1K 7P4, Canada
[3] Time Domain Corp, Huntsville, AL 35806 USA
[4] Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2007年 / 276卷 / 02期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1016/j.optcom.2007.04.018
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We studied the spectral and angular distribution of intense third-harmonic pulses generated in atmospheric air during the filamentation of a near infrared femtosecond laser pulse. The co-filamentation of the high intensity fundamental and third-harmonic pulses induces a spectral shift of the third-harmonic pulse as a function of the fundamental power. The third-harmonic conical emission is red-shifted while its central part blue-shifted. The experimental results are in good qualitative agreement with the results of numerical simulations. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：298 / 304
页数：7
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