Femtosecond laser filamentation for sensing combustion intermediates: A comparative study

被引:25
|
作者
Li, He-Long [1 ]
Wei, Xiang-Ye [1 ]
Xu, Huai-Liang [1 ]
Chin, See-Leang [2 ,3 ]
Yamanouchi, Kaoru [4 ]
Sun, Hong-Bo [1 ,5 ]
机构
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
[2] Univ Laval, Dept Phys, Quebec City, PQ G1V 0A6, Canada
[3] Univ Laval, Ctr Opt Photon & Laser, Quebec City, PQ G1V 0A6, Canada
[4] Univ Tokyo, Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan
[5] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China
来源
基金
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词
Femtosecond laser filament; Fluorescence; Laser sensing; Combustion;
D O I
10.1016/j.snb.2014.06.086
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
We demonstrate experimental evidences that femtosecond filament-induced clean fingerprint fluorescence can indeed be employed to characterize the combustion intermediates in flames. By comparing the emission spectra obtained from an ethanol-air flame by femtosecond filament excitation, nanosecond laser-breakdown excitation, as well as without any laser excitation, it is found that the filament-induced fluorescence in the combustion flame mainly results from the interaction of femtosecond laser pulses with the combustion intermediates such as OH, CH, and C-2 existing in the combustion, but not from the fragmentation of parent ethanol molecules. (C) 2014 Elsevier B. V. All rights reserved.
引用
收藏
页码:887 / 890
页数:4
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