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Experimental Confirmation of High-Stability of Fluorescence in a Femtosecond Laser Filament in Air
Xu Shengqi ,Zhang Yizhu,Liu Weiwei *
Institute of Modern Optics, Nankai University
*Correspondence author
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Funding: 高等学校博士学科点专项科研基金（No.No：20070055074）
Opened online:24 December 2010
Accepted by: none
Citation: Xu Shengqi ,Zhang Yizhu,Liu Weiwei .Experimental Confirmation of High-Stability of Fluorescence in a Femtosecond Laser Filament in Air[OL]. [24 December 2010] http://en.paper.edu.cn/en_releasepaper/content/4396966
 
 
Femtosecond laser filamentation is particularly interesting for remote sensing pollutant in the atmosphere. It 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.
Keywords:optics;remote sensing;intensity clamping;filamentation
 
 
 

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