Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air

被引：4
|
作者：
W.Liu
Q.Luo
S.L.Chin
机构：
[1] Canada G1K 7P4
[2] Department de physique
[3] Quebec (Quebec)
[4] Universite Laval
[5] de genie physique et d’optique and Centre d’optique
[6] photonique et laser (COPL)
来源：
Chinese Optics Letters | 2003年 / 01期
关键词：
in; as; it; be; is; Competition between multiphoton/tunnel ionization and filamentation induced by powerful femtosecond laser pulses in air; by; line;
D O I：
暂无
中图分类号：
O436 [物理光学（波动光学）];
学科分类号：
070207 ; 0803 ;
摘要：
In this work we present experiments by focusing 42 femtosecond laser pulses in air using three differentfocal length lenses: f=100, 30 and 5 cm. For the longest focal length, only the filament, which is aweak plasma column,is observed. When the shorter focal length lens is used, a high density plasma isgenerated near the geometrical focus and coexists with a weak plasma channel of the filamemt. Under thetightest focusing condition, filamentation is prevented and only a strong plasma volume appears at tehgeometrical focus.
引用
收藏
页码：56 / 59
页数：4
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