Abstract
An optical hydrogen sulfide (H2S) sensor based on wavelength modulation spectroscopy with the second harmonic (2f) corrected by the first harmonic (1f) signal (WMS-2f/1f) is developed using a distributed feedback (DFB) laser emitting at 1.578 μm and a homemade gas cell with 1-m-long optical path length. The novel sensor is constructed by an electrical cabinet and an optical reflecting and receiving end. The DFB laser is employed for targeting a strong H2S line at 6 336.62 cm-1 in the fundamental absorption band of H2S. The sensor performance, including the minimum detection limit and the stability, can be improved by reducing the laser intensity drift and common mode noise by means of the WMS-2f/1f technique. The experimental results indicate that the linearity and response time of the sensor are 0.999 26 and 6 s (in concentration range of 15.2—45.6 mg/m3), respectively. The maximum relative deviation for continuous detection (60 min) of 30.4 mg/m3 H2S is 0.48% and the minimum detection limit obtained by Allan variance is 79 μg/m3 with optimal integration time of 32 s. The optical H2S sensor can be applied to environmental monitoring and industrial production, and it has significance for real-time online detection in many fields.
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References
Qian Zhang and Wenqing Liu, Chemical Engineering & Equipment 5, 151 (2011). (in Chinese)
Dong-Peng Li, Jin-Feng Zhang, Jie Cui, Xiao-Feng Ma, Jin-Ting Liu, Jun-Ying Miao and Bao-Xiang Zhao, Sensors and Actuators B: Chemical 234, 231 (2016).
Gonge Tang, Cailan Zhao, Jie Gao and Hongliang Tan, Sensors and Actuators B: Chemical 237, 795 (2016).
Peng Yi-jie, Liu Mu-hua, Zhao Jin-hui, Li Yao, Tao Jin-jiang and Guo Hong-qing, Journal of Optoelectronics ·Laser 27, 845 (2016). (in Chinese)
Chen Xiang, Kan Rui-feng, Yang Chen-guang, Xu Zhen-yu, Zhang Guang-le, Chen Fu-duo and Liu Jian-guo, Journal of Optoelectronics·Laser 26, 719 (2015). (in Chinese)
S. Neethu, R. Verma, S. S. Kamble, J. K. Radhakrishnan, P. P. Krishnapur and V. C. Padaki, Sensors and Actuators B: Chemical 192, 70 (2014).
Ritobrata Sur, Kai Sun, Jay B. Jeffries, John G. Socha and Ronald K. Hanson, Fuel 150, 102 (2015).
J. Shao, J. Jie, L. M. Wang, C. F. Ying and Z. Zhou, Optics Communications 336, 67 (2015).
A. Hartmann, R. Strzoda, R. Schrobenhauser and R. Weigel, Journal of Quantitative Spectroscopy and Radiative Transfer 133, 619 (2014).
http://hitran.iao.ru/molecule/simlaunch.
Lu Wang, Chunxi Zhang, Tie Lin, Xianmu Li and Tao Wang, Measurement 75, 263 (2015).
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This work has been supported by the National Natural Science Foundation of China (Nos.60808020 and 61078041), the Natural Science Foundation of Tianjin (Nos.16JCQNJC02100, 15JCYBJC51700 and 16JCYBJC15400), and the National Science and Technology Support (No.2014BAH03F01).
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Song, Lm., Liu, Lw., Yang, Yg. et al. An optical sensor for hydrogen sulfide detection in open path using WMS-2f/1f technique. Optoelectron. Lett. 12, 465–468 (2016). https://doi.org/10.1007/s11801-016-6170-7
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DOI: https://doi.org/10.1007/s11801-016-6170-7