Backward angular distribution of air lasing induced by femtosecond laser filamentation

被引：14

作者：

Zeng, T. ^{[1
]}

Zhao, J. Y. ^{[1
]}

Liu, W. ^{[1
]}

Chin, S. L. ^{[2
]}

机构：

[1] Nankai Univ, Key Lab Opt Informat Sci & Technol, Minist Educ, Inst Modern Opt, Tianjin 300071, Peoples R China

[2] Univ Laval, COPL, Dept Phys Genie Phys & Opt, Quebec City, PQ G1V 0A6, Canada

来源：

LASER PHYSICS LETTERS | 2014年 / 11卷 / 07期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会; 中国国家自然科学基金;

关键词：

ultrafast; filamentation; remote sensing; LIGHT FILAMENTS; OPTICAL MEDIA; PULSES; SPECTROSCOPY; INTENSITY; EMISSION; PROPAGATION; BREAKDOWN; PHYSICS; N-2;

D O I：

10.1088/1612-2011/11/7/075401

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Angular distribution of the backscattered nitrogen fluorescence induced by femtosecond laser filamentation in air has been studied. The experimental results demonstrate that the fluorescence intensity forms multiple rings and is amplified in the backward direction through amplified spontaneous emission (ASE). More importantly, the ASE signal features an angular dependent gain coefficient. The results are valuable for the optimization of the remote-sensing setup by the filamentation in air.

引用

页数：5

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