Design and Optimization of QTF Chopper for Quartz-Enhanced Photoacoustic Spectroscopy

被引：2
|
作者：
Dong, Lei [1 ]
Liu, Yanyan [1 ]
Zheng, Huadan [1 ]
Liu, Xiaoli [1 ]
Wu, Hongpeng [1 ]
Ma, Weiguang [1 ]
Zhang, Lei [1 ]
Yin, Wangbao [1 ]
Jia, Suotang [1 ]
机构：
[1] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2015年 / 36卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
Gas sensor; QTF chopper; Quartz-enhanced photoacoustic spectroscopy; Trace gas detection;
D O I：
10.1007/s10765-014-1682-5
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A novel quartz-tuning-fork (QTF) chopper was developed for quartz-enhanced photoacoustic spectroscopy (QEPAS). Unlike the conventional wavelength-modulation-based QEPAS, the QTF chopper chops the continuous wave excitation light into a sequence of light pulses, which realizes the amplitude-modulation (AM)-based QEPAS. In order to reduce the chopping noise and to make the resonance frequency of the QTF chopper perfectly match that of the detection QTF, a careful design and optimization were implemented. The performance of the AM-based QEPAS sensor for detection was also evaluated in detail.
引用
收藏
页码：1289 / 1296
页数：8
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