The effect of long timescale gas dynamics on femtosecond filamentation

被引：128
|
作者：
Cheng, Y. -H. [1 ]
Wahlstrand, J. K. [1 ]
Jhajj, N. [1 ]
Milchberg, H. M. [1 ]
机构：
[1] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 04期
基金：
美国国家科学基金会;
关键词：
PLASMA WAVE-GUIDE; TIME-EVOLUTION; LASER-PULSES; SINGLE-SHOT; INTENSE; AIR; COMPRESSION; GENERATION; RADIATION;
D O I：
10.1364/OE.21.004740
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Femtosecond laser pulses filamenting in various gases are shown to generate long- lived quasi-stationary cylindrical depressions or 'holes' in the gas density. For our experimental conditions, these holes range up to several hundred microns in diameter with gas density depressions up to similar to 20%. The holes decay by thermal diffusion on millisecond timescales. We show that high repetition rate filamentation and supercontinuum generation can be strongly affected by these holes, which should also affect all other experiments employing intense high repetition rate laser pulses interacting with gases. (C) 2013 Optical Society of America
引用
收藏
页码：4740 / 4751
页数：12
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