中国物理B ›› 2019, Vol. 28 ›› Issue (6): 63301-063301.doi: 10.1088/1674-1056/28/6/063301

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Hydrogen sulphide detection using near-infrared diode laser and compact dense-pattern multipass cell

Xing Tian(田兴), Yuan Cao(曹渊), Jia-Jin Chen(陈家金), Kun Liu(刘锟), Gui-Shi Wang(王贵师), Xiao-Ming Gao(高晓明)   

  1. 1 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
    2 University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2019-03-11 修回日期:2019-04-11 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: Kun Liu E-mail:liukun@aiofm.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFC0303900 and 2017YFC0209700).

Hydrogen sulphide detection using near-infrared diode laser and compact dense-pattern multipass cell

Xing Tian(田兴)1,2, Yuan Cao(曹渊)1,2, Jia-Jin Chen(陈家金)1, Kun Liu(刘锟)1, Gui-Shi Wang(王贵师)1, Xiao-Ming Gao(高晓明)1   

  1. 1 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
    2 University of Science and Technology of China, Hefei 230026, China
  • Received:2019-03-11 Revised:2019-04-11 Online:2019-06-05 Published:2019-06-05
  • Contact: Kun Liu E-mail:liukun@aiofm.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFC0303900 and 2017YFC0209700).

摘要:

Sub-ppmv level detection of hydrogen sulphide (H2S) using a 1.578-μm distributed feedback tunable diode laser combining with wavelength modulation spectroscopy and second harmonic detection scheme is reported. A home-developed novel compact dense-pattern multipass gas cell with an effective optical path length of 29.37 m is used to improve sensitivity and reduce sample volume. Detection parameters are optimized, including modulation frequency and amplitude. The analysis of Allan variance shows that a minimum detectable concentration 60 ppbv is obtained with a lock-in time constant of 10 ms, and a detection limit of 13 ppbv can be achieved by average in 300 s. The demonstrated H2S sensor has a strong penitential application in natural gas process for regulating and controlling H2S concentration.

关键词: hydrogen sulphide, wavelength modulation spectroscopy, second harmonic detection, detection limit

Abstract:

Sub-ppmv level detection of hydrogen sulphide (H2S) using a 1.578-μm distributed feedback tunable diode laser combining with wavelength modulation spectroscopy and second harmonic detection scheme is reported. A home-developed novel compact dense-pattern multipass gas cell with an effective optical path length of 29.37 m is used to improve sensitivity and reduce sample volume. Detection parameters are optimized, including modulation frequency and amplitude. The analysis of Allan variance shows that a minimum detectable concentration 60 ppbv is obtained with a lock-in time constant of 10 ms, and a detection limit of 13 ppbv can be achieved by average in 300 s. The demonstrated H2S sensor has a strong penitential application in natural gas process for regulating and controlling H2S concentration.

Key words: hydrogen sulphide, wavelength modulation spectroscopy, second harmonic detection, detection limit

中图分类号:  (Infrared spectra)

  • 33.20.Ea
42.55.-f (Lasers) 42.62.-b (Laser applications) 42.62.Fi (Laser spectroscopy)