Photoacoustic measurement of methane concentrations with a compact pulsed optical parametric oscillator

被引：37
作者：
Miklós, A
Lim, CH
Hsiang, WW
Liang, GC
Kung, AH
Schmohl, A
Hess, P
机构：
[1] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany
[2] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan
来源：
APPLIED OPTICS | 2002年 / 41卷 / 15期
关键词：
D O I：
10.1364/AO.41.002985
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A pulsed periodically poled lithium niobate optical parametric oscillator operating in a cavity with a grazing-incidence grating configuration was used for sensitive and precise measurement of trace quantities of methane in nitrogen by photoacoustic spectroscopy with a novel differential photoacoustic detector. A sensitivity of 1.2 parts in 10(9) by volume of methane was obtained in direct calibration measurements (not extrapolated). With this apparatus, in situ measurement of the methane concentration in ambient air under atmospheric conditions was demonstrated. (C) 2002 Optical Society of America.
引用
收藏
页码：2985 / 2993
页数：9
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