Mid-Infrared Tunable Laser-Based Broadband Fingerprint Absorption Spectroscopy for Trace Gas Sensing: A Review

Applied Sciences

Jinyi Li¹  Nan Gao²  Shuai Zhang³  Kebin Tong³  Zhenhui Du³ 

[1] Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin Polytechnic University, Tianjin 300387, China;Key Laboratory of Micro Opto-electro Mechanical System Technology, Tianjin University, Ministry of Education, Tianjin 300072, China;State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;

关键词: tunable laser absorption spectroscopy;    mid-infrared fingerprint spectrum;    broadband spectrum;    trace gas detection;    wavelength modulation spectroscopy;    quantum cascade lasers;    interband cascade lasers;   

DOI  :  10.3390/app9020338

来源: DOAJ

【 摘 要 】

The vast majority of gaseous chemical substances exhibit fundamental rovibrational absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light by these fundamental bands provides a nearly universal means for their detection. A main feature of optical techniques is the non-intrusive in situ detection of trace gases. We reviewed primarily mid-infrared tunable laser-based broadband absorption spectroscopy for trace gas detection, focusing on 2008–2018. The scope of this paper is to discuss recent developments of system configuration, tunable lasers, detectors, broadband spectroscopic techniques, and their applications for sensitive, selective, and quantitative trace gas detection.

【 授权许可】

Unknown