All optical quartz-enhanced photoacoustic spectroscopy

被引：12

作者：

Liu Yan-Yan ^{[1
]}

Dong Lei ^{[1
]}

Wu Hong-Peng ^{[1
]}

Zheng Hua-Dan ^{[1
]}

Ma Wei-Guang ^{[1
]}

Zhang Lei ^{[1
]}

Yin Wang-Bao ^{[1
]}

Jia Suo-Tang ^{[1
]}

机构：

[1] Shanxi Agr Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China

来源：

ACTA PHYSICA SINICA | 2013年 / 62卷 / 22期

基金：

中国国家自然科学基金;

关键词：

quartz-enhanced photoacoustic spectroscopy; quartz tuning fork; gas sensor;

D O I：

10.7498/aps.62.220701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A trace gas sensor based on all optical quartz-enhanced photoacoustic spectroscopy (QEPAS) is designed and demonstrated. An extra detection light beam is added to the traditional QEPAS setup to convert the amplitude of vibration of the quartz tuning fork, which is proportional to the concentration of the target gas, into the variation of the detection light intensity. As a result, there are not any electrical components near the measurement position. Such a design makes it immune to electromagnetic interference and provides a compact sensor head, which can be used in a tiny space or an adverse environment. Using the new setup to measure the water concentration in air, the obtained noise equivalent absorption coefficient is 1.13 x 10(-6) cm(-1)W/root Hz. The approaches to further optimizing the system and improving the sensitivity are also discussed in detail.

引用

页数：5

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