Off-beam quartz-enhanced photoacoustic spectroscopy

被引：210

作者：

Liu, Kun ^{[1
,2
]}

Guo, Xiaoyong ^{[3
]}

Yi, Hongming ^{[1
,2
]}

Chen, Weidong ^{[4
]}

Zhang, Weijun ^{[1
,2
]}

Gao, Xiaoming ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Environm Spect Lab, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, Key Lab Atmospher Composit & Opt Radiat, Hefei 230031, Peoples R China

[3] Chinese Acad Sci, Space Informat & Simulat Technol Lab, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China

[4] Univ Littoral Cote dOpale, Physicochim Atmosphere Lab, CNRS, UMR 8101, F-59140 Dunkerque, France

来源：

OPTICS LETTERS | 2009年 / 34卷 / 10期

关键词：

SENSOR;

D O I：

10.1364/OL.34.001594

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An offbeam (OB) detection approach is suggested and experimentally investigated and optimized for quartz-enhanced photoacoustic spectroscopy (QEPAS). This OB-QEPAS configuration, very simple in assembly, not only allows for use of larger excitation optical beams and facilitating optical alignment but also provides higher enhancement of photoacoustic signals than previously published results based on the common on-beam QEPAS under the same experimental conditions. A normalized noise equivalent absorption coefficient (1 sigma) of 5.9 x 10(-9) cm(-1) W/Hz(1/2) was obtained for water vapor detection at normal atmospheric pressure. (C) 2009 Optical Society of America

引用

页码：1594 / 1596

页数：3

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