High-order harmonic generation by self-guided femtosecond laser pulses in argon

被引：0
|
作者：
Huo, Yiping [1 ]
Zeng, Zhinan [2 ]
Li, Ruxin [2 ]
机构：
[1] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Shaanxi, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China
来源：
OPTIK | 2011年 / 122卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Nonlinear optics; HHG; Harmonic divergence angle; Laser chirp; Blueshift; CONVERSION; FIELD;
D O I：
10.1016/j.ijleo.2010.04.001
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
High-order harmonic generation (HHG) with 40 fs laser pulse in a quasistatic gas cell filled with argon gas was studied. Experiment results in several aspects were given and analyzed. As a result of balancing diffraction and plasma defocusing, and a large harmonic-generation cross-section, the spatial quality of the 23rd harmonic is successfully optimized with a divergence angle of 0.38 mrad. The modulation of spectral spatial divergence angle by the gas pressure was given, which was explained by the formation of plasma channel. The effect of initial laser pulse chirp on the harmonic generation and the harmonic spectral blueshift under different gas pressure were given and analyzed. (c) 2010 Elsevier GmbH. All rights reserved.
引用
收藏
页码：367 / 369
页数：3
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