Ammonia measurements with femtosecond laser-induced plasma spectroscopy

被引：13

作者：

Zhang, Dayuan ^{[1
]}

Gao, Qiang ^{[1
]}

Li, Bo ^{[1
]}

Liu, Jixu ^{[1
]}

Li, Zhongshan ^{[1
,2
]}

机构：

[1] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China

[2] Lund Univ, Div Combust Phys, POB 118, SE-22100 Lund, Sweden

来源：

APPLIED OPTICS | 2019年 / 58卷 / 05期

基金：

中国国家自然科学基金;

关键词：

193 NM PHOTOLYSIS; INDUCED FLUORESCENCE; 2-PHOTON FORMATION; COMBUSTION; FRAGMENTATION; EMISSION; NH3;

D O I：

10.1364/AO.58.001210

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Femtosecond laser-induced plasma spectroscopy for in situ ammonia (NH3) measurements was demonstrated in NH3/N-2 mixtures. When a femtosecond laser at 800 nm was focused at the flow field, the parent NH3 molecules would be photolyzed to generate electronics excited NH fragments, and then indirect measurements of NH3 could be realized by detecting the NH fluorescence (A(3)Pi - X-3 Sigma(-)) at 336 nm. A detection limit of 205 ppm was achieved. This work is the first attempt, to the best of our knowledge, for ammonia measurements with a femtosecond laser, and the results are useful for the development of ammonia diagnostics. (C) 2019 Optical Society of America

引用

页码：1210 / 1214

页数：5

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