Plasma channel formed by ultraviolet laser pulses at 193 nm in air

被引：0
作者：
Ma, Yuanyuan [1 ,2 ]
Lu, Xin [1 ]
Xi, Tingting [2 ,4 ]
Gong, Qihuang [1 ]
Zhang, Jie [1 ,2 ,3 ]
机构：
[1] Peking Univ, Dept Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100190, Peoples R China
[3] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
[4] Chinese Acad Sci, Grad Univ, Dept Phys, Beijing 100049, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2009年 / 7卷 / 09期
基金：
中国国家自然科学基金;
关键词：
LIGHT FILAMENTS; FEMTOSECOND; PROPAGATION; SIMULATIONS; INTENSITY; GASES;
D O I：
10.3788/COL20090709.0865
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The propagation of picosecond deep ultraviolet laser pulse at wavelength of 193 nm in air is numerically investigated. Long plasma channel can be formed due to the competition between Kerr self-focusing and ionization induced defocusing. The plasma channel with electron density of above 10(13)/cm(3) can be formed over 70 m by 50-ps, 20-mJ laser pulses. The fluctuation of laser intensity and electron density inside ultraviolet (UV) plasma channel is significantly lower than that of infrared pulse. The linear absorption of UV laser by air is considered in the simulation and it is shown that the linear absorption is important for the limit of the length of plasma channel.
引用
收藏
页码：865 / 868
页数：4
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