Sensitive absorption measurements of hydrogen sulfide at 1.578 μm using wavelength modulation spectroscopy

doi:10.1088/1674-1056/24/3/034204

Abstract Sensitive detection of hydrogen sulfide (H₂S) has been performed by means of wavelength modulation spectroscopy (WMS) near 1.578 μm. With the scan amplitude and the stability of the background baseline taken into account, the response time is 4 s for a 0.8 L multi-pass cell with a 56.7 m effective optical path length. Moreover, the linearity has been tested in the 0-50 ppmv range. The detection limit achievable by the Allan variance is 224 ppb within 24 s under room temperature and ambient pressure conditions. This tunable diode laser absorption spectroscopy (TDLAS) system for H₂S detection has the feasibility of real-time online monitoring in many applications.

Keywords: tunable diode laser spectroscopy wavelength modulation hydrogen sulfide detection low absorbance condition

Received: 19 September 2014
Revised: 10 October 2014
Accepted manuscript online:

PACS:	42.62.Fi	(Laser spectroscopy)
	42.55.Px	(Semiconductor lasers; laser diodes)
	42.79.-e	(Optical elements, devices, and systems)
	42.87.-d	(Optical testing techniques)

Fund: Project supported by the Special Fund for Basic Research on Scientific Instruments of the Chinese Academy of Sciences (Grant No. YZ201315) and the National Natural Science Foundation of China (Grant Nos. 11204320, 41405034, and 11204319).

Corresponding Authors: Dong Feng-Zhong
E-mail: fzdong@aiofm.ac.cn

Cite this article:

Xia Hua (夏滑), Dong Feng-Zhong (董凤忠), Wu Bian (吴边), Zhang Zhi-Rong (张志荣), Pang Tao (庞涛), Sun Peng-Shuai (孙鹏帅), Cui Xiao-Juan (崔小娟), Han Luo (韩荦), Wang Yu (王煜) Sensitive absorption measurements of hydrogen sulfide at 1.578 μm using wavelength modulation spectroscopy 2015 Chin. Phys. B 24 034204

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Sensitive absorption measurements of hydrogen sulfide at 1.578 μm using wavelength modulation spectroscopy

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