Email this article A Novel Method for the Detection of Trace Gases Based on Photo-Acoustic Spectroscopy
- Authors: Zhang Z.1, Jia S.1, Wang F.1, Wang Y.1
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Affiliations:
- School of Mechanical Engineering, Xi’an Jiao Tong University
- Issue: Vol 37, No 3 (2016)
- Pages: 285-290
- Section: Article
- URL: https://journal-vniispk.ru/1071-2836/article/view/247854
- DOI: https://doi.org/10.1007/s10946-016-9573-9
- ID: 247854
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Abstract
We study quartz tuning fork (QTF) characteristics using a 532 nm semiconductor laser with a power of 39 mW and calculate QTF vibrations caused by thermal noise and disturbance of the air using the equipartition theorem; the vibration value is about 1.152 Pm. The signal-to-noise ratio and QTF resonance amplitude acquired experimentally are 104.56 and 214.75 Pm, respectively. In addition, we develop a new photo-acoustic spectroscopic system for detection of trace acetylene using a CW diode laser source with distributed feedback operating near 1,532 nm, measure the absorption spectrum of acetylene employing this system, and show that the method elaborated is more sensitive than photoelectric detectors that provides new directions for research in photo-acoustic spectroscopy.
About the authors
Zhouqiang Zhang
School of Mechanical Engineering, Xi’an Jiao Tong University
Email: shjia@mail.xjtu.edu.cn
China, Xi’an, 710049
Shuhai Jia
School of Mechanical Engineering, Xi’an Jiao Tong University
Author for correspondence.
Email: shjia@mail.xjtu.edu.cn
China, Xi’an, 710049
Fei Wang
School of Mechanical Engineering, Xi’an Jiao Tong University
Email: shjia@mail.xjtu.edu.cn
China, Xi’an, 710049
Yonglin Wang
School of Mechanical Engineering, Xi’an Jiao Tong University
Email: shjia@mail.xjtu.edu.cn
China, Xi’an, 710049
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