Research of TDLAS methane detection system using VCSEL laser as the light source

doi:10.3788/IRLA202049.0405002

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	Research of TDLAS methane detection system using VCSEL laser as the light source
	B. Wang,H. Lu,A. Li,Y. Chen,T. Dai,S. Huang and H. Lian
	2020
发表期刊	Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
ISSN	10072276
卷号	49 期号:4 页码:7
摘要	Compared with the DFB laser, the TDLAS laser gas detecting system using the VCSEL laser as the detecting light source has the advantage of low power consumption. According to the characteristic of the low power TDLAS gas detection signal, combined with the characteristics of modulation VCSEL laser source, a laser driver, signal acquisition and processing were designed, and a low-power TDLAS methane (CH4) gas detector based on WMS was designed. The absorption peak of CH4 molecule near 1653.7 nm was selected as the absorption line, and the second harmonic (2f) signal was extracted by a lock-in amplifier. The response of different concentrations of CH4 detection was studied experimentally, and the 2f signal's amplitude was recorded and linearly fitted. The results show that the CH4 concentration has a good linear relationship with its 2f signal's amplitude, and the linearity is 0.9998. Accuracy of the detection system is better than 10% in the range of 50 - 500 ppmv, and the detection limit is 10 ppmv. With the long-term detection of 250 ppmv of CH4 for 10 h, the fluctuations are less than 2.4%. Allan deviation analysis was introduced. When the initial integration time was 1 s, the Allan deviation was 9.9 ppmv. When the integration time reached 359 s, the Allan deviation was 0.06 ppmv, which indicated the good stability of the system. 2020, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
DOI	10.3788/IRLA202049.0405002
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收录类别	EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64840
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	B. Wang,H. Lu,A. Li,Y. Chen,T. Dai,S. Huang and H. Lian. Research of TDLAS methane detection system using VCSEL laser as the light source[J]. Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,2020,49(4):7.
APA	B. Wang,H. Lu,A. Li,Y. Chen,T. Dai,S. Huang and H. Lian.(2020).Research of TDLAS methane detection system using VCSEL laser as the light source.Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering,49(4),7.
MLA	B. Wang,H. Lu,A. Li,Y. Chen,T. Dai,S. Huang and H. Lian."Research of TDLAS methane detection system using VCSEL laser as the light source".Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering 49.4(2020):7.

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