Experimental confirmation of high-stability of fluorescence in a femtosecond laser filament in air

被引：19

作者：

Xu, Shengqi ^{[1
]}

Zhang, Yizhu ^{[1
]}

Liu, Weiwei ^{[1
]}

Chin, See Leang ^{[2
,3
]}

机构：

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

[2] Univ Laval, Ctr Opt Photon & Laser, Quebec City, PQ G1V 0A6, Canada

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

来源：

OPTICS COMMUNICATIONS | 2009年 / 282卷 / 24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;

关键词：

Femtosecond laser; Filamentation; Intensity clamping; Remote sensing; LIGHT FILAMENTS; TRANSPARENT MEDIA; PULSES; INTENSITY; PHYSICS;

D O I：

10.1016/j.optcom.2009.08.065

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Femtosecond laser filamentation is particularly interesting for remote sensing pollutant in the atmosphere. In this work, we investigate the local shot-to-shot stability of the filament induced fluorescence of nitrogen in air. It is found that the root-mean square fluctuation of the fluorescence signal is at least one order of magnitude lower than that of the linear propagation case. In practice, it would contribute to improve the robustness of long distance spectroscopic analysis of the fluorescence of pollutant molecules inside the filament. We further point out that this unique property of filament induced fluorescence spectroscopy is because of the intensity clamping, a profound phenomenon of filamentation. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：4800 / 4804

页数：5

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