Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber

doi:10.3390/app9132637

CIOMP OpenIR

	Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber
	B.Wang; H.F.Lu; C.Chen; L.Chen; H.Q.Lian; T.X.Dai; Y.Chen
	2019
发表期刊	Applied Sciences-Basel
卷号	9 期号:13 页码:11
摘要	A time division multiplexing differential modulation technique is proposed to address the interference problem caused by the fluctuation of laser light intensity in the single optical path detection system. Simultaneously, a multi-reflection chamber is designed and manufactured to further improve the system's precision with an optical path length of 80 m. A near-infrared C2H2 detection system was developed. The absorption peak of the acetylene (C2H2) molecule near 1520 nm was selected as the absorption line. A laser driver is developed, and a lock-in amplifier is used to extract the second harmonic (2f) signal. A good linear relationship existed between C2H2 concentration and the 2f signal, and the correlation coefficient was 0.9997. In the detection range of 10-100 ppmv, the minimum detection limit was 0.3 ppmv, and the precision was 2%. At 50 ppmv, C2H2 and continuous detection for 10 h, the data average was 50.03 ppmv, and the fluctuation was less than +/- 1.2%. The Allan variance method was adopted to evaluate the long-term characteristic of the system. At 1 s of integration time, the Allan deviation was 0.3 ppmv. When the integration time reached 362 s, the Allan deviation was 0.0018 ppmv, which indicates the good stability of the detection system.
关键词	near-infrared,C2H2 detection,TDLAS,time division multiplexing,differential modulation,a multi-reflection chamber,sensor,tdlas,acetylene,enhancement,cell,ch4,co2,Chemistry,Engineering,Materials Science,Physics
DOI	10.3390/app9132637
收录类别	SCI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63028
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.F.Lu,C.Chen,et al. Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber[J]. Applied Sciences-Basel,2019,9(13):11.
APA	B.Wang.,H.F.Lu.,C.Chen.,L.Chen.,H.Q.Lian.,...&Y.Chen.(2019).Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber.Applied Sciences-Basel,9(13),11.
MLA	B.Wang,et al."Near-Infrared C2H2 Detection System Based on Single Optical Path Time Division Multiplexing Differential Modulation Technique and Multi-Reflection Chamber".Applied Sciences-Basel 9.13(2019):11.

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