T-shape microresonator-based high sensitivity quartz-enhanced photoacoustic spectroscopy sensor

被引：61

作者：

Yi, Hongming ^{[1
,2
]}

Chen, Weidong ^{[3
]}

Sun, Shanwen ^{[1
,2
]}

Liu, Kun ^{[1
,2
]}

Tan, Tu ^{[1
,2
]}

Gao, Xiaoming ^{[1
,2
]}

机构：

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

[2] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Lab Atmospher Physicochem, Hefei 230031, Peoples R China

[3] Univ Littoral Cote dOpale, Lab Physicochim Atmosphere, Dunkerque, France

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Photoacoustic effect - Excited states - Microresonators - Quartz;

D O I：

10.1364/OE.20.009187

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A novel spectrophone sensor prototype consisting of a T-shaped acoustic microresonator (T-mR) in off-beam quartz-enhanced photoacoustic spectroscopy (T-mR QEPAS) is introduced for the first time. Its performance was evaluated and optimized through an acoustic model and experimental investigation via detection of water vapor in the atmosphere. The present work shows that the use of T-mR in QEPAS based sensor can improve the detection sensitivity by a factor of up to similar to 30, compared with that using only a bare QTF. This value is as high as that obtained in a conventional "on-beam" QEPAS, while keeping the advantages of "off-beam" QEPAS configuration: it is no longer necessary to couple excitation light beam through the narrow gap between the QTF prongs. In addition, the T-mR is really suitable for mass production with high precision. (C)2012 Optical Society of America

引用

页码：9187 / 9196

页数：10

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