Water vapor concentration detection based on QEPAS sensor

被引:0
|
作者
Ma, Y. F. [1 ,2 ]
He, Y. [1 ]
Zhang, J. B. [1 ]
Yu, G. [1 ]
Yu, X. [1 ]
Chen, C. [1 ]
Sun, R. [2 ]
Zhang, J. W. [3 ]
机构
[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Sch Energy Sci & Engn, Postdoctoral Mobile Stn Power Engn & Engn Thermop, Harbin 150001, Peoples R China
[3] Northeast Forestry Univ, Coll Mech & Elect Engn, Harbin 150040, Peoples R China
基金
中国国家自然科学基金; 黑龙江省自然科学基金; 中国博士后科学基金;
关键词
Quartz-enhanced photoacoustic spectroscopy; Quartz tuning fork; Resonant frequency; Water vapor; PPB-LEVEL DETECTION; PHOTOACOUSTIC-SPECTROSCOPY;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this letter, a quartz-enhanced photoacoustic spectroscopy (QEPAS) based trace gas sensor using a quartz tuning fork (QTF) with resonant frequency of 40 kHz as the acoustic wave transducer was demonstrated for the first time. A 1.395 mu m continuous wave (CW), fiber-coupled distributed feedback (DFB) diode laser was employed as the exciting source. Water vapor was selected as the target gas, and wavelength modulation spectroscopy (WMS) with 2nd harmonic detection was utilized. After optimization of the laser modulation depth, a minimum detection limit (MDL) of 139 ppmv was obtained.
引用
收藏
页码:351 / 353
页数:3
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