A robust optical sensor for remote multi-species detection combining frequency-division multiplexing and normalized wavelength modulation spectroscopy

doi:10.3390/s21041073

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	A robust optical sensor for remote multi-species detection combining frequency-division multiplexing and normalized wavelength modulation spectroscopy
	W. Jin; H. Zhang; M. Hu; M. Hu; Y. Wei; J. Liang; R. Kan and Q. Wang
刊名	Sensors (Switzerland)
	2021
卷号	21 期号:4 页码:1-13
ISSN号	14248220
DOI	10.3390/s21041073
英文摘要	By combining frequency-division multiplexing and normalized wavelength modulation spectroscopy, a robust remote multi-species sensor was developed and demonstrated for practical hydrocarbon monitoring. Independently modulated laser beams are combined to simultaneously interrogate different gas samples using an open-ended centimeter-size multipass cell. Gas species of interest are demodulated with the second harmonics to enhance sensitivity, and high immunity to laser power variation is achieved by normalizing to the corresponding first harmonics. Performance of the optical sensor was experimentally evaluated using methane (CH4) and acetylene (C2H2) samples, which were separated by a 3-km fiber cable from the laser source. Sub-ppm sensitivity with 1-s time resolution was achieved for both gas species. Moreover, even with large laser intensity fluctuations ranging from 0 to 6 dB, the noise can be kept within 1.38 times as much as that of a stable intensity case. The reported spectroscopic technique would provide a promising optical sensor for remote monitoring of multi hazardous gases with high robustness. 2021 by the authors. Licensee MDPI, Basel, Switzerland.
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/65606]
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	W. Jin,H. Zhang,M. Hu,et al. A robust optical sensor for remote multi-species detection combining frequency-division multiplexing and normalized wavelength modulation spectroscopy[J]. Sensors (Switzerland),2021,21(4):1-13.
APA	W. Jin.,H. Zhang.,M. Hu.,M. Hu.,Y. Wei.,...&R. Kan and Q. Wang.(2021).A robust optical sensor for remote multi-species detection combining frequency-division multiplexing and normalized wavelength modulation spectroscopy.Sensors (Switzerland),21(4),1-13.
MLA	W. Jin,et al."A robust optical sensor for remote multi-species detection combining frequency-division multiplexing and normalized wavelength modulation spectroscopy".Sensors (Switzerland) 21.4(2021):1-13.