Variable pressure infrared diode laser spectroscopy: a new method for trace-gas monitoring

被引：5
作者：
Dusanter, S [1 ]
Lemoine, B
Hanoune, B
Devolder, P
机构：
[1] Univ Sci & Tech Lille Flandres Artois, Ctr Etudes & Rech Lasers & Applicat, UMR 8522, Physicochim Processus Combust & Atmosphere, F-59655 Villeneuve Dascq, France
[2] Univ Sci & Tech Lille Flandres Artois, Ctr Etudes & Rech Lasers & Applicat, UMR 8522, Lab Phys Lasers Atom & MOl, F-59655 Villeneuve Dascq, France
来源：
APPLIED OPTICS | 2002年 / 41卷 / 24期
关键词：
D O I：
10.1364/AO.41.005142
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new method for measuring trace concentrations of atmospheric pollutants by infrared diode laser spectroscopy has been devised. This method relies on the increase of the signal as the pressure inside the cell increases, while the frequency of the diode is stabilized on the line, even if it is unresolved. Performances of this method were tested with N2O and with 1,3-butadiene. As an example of application, we measured the butadiene emitted by car exhausts. Sensitivity and rapidity of this method are equivalent to the usual scanning method in which the whole line is described, but this new method benefits from its simplicity and robustness. (C) 2002 Optical Society of America.
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收藏
页码：5142 / 5147
页数：6
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