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Review

Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review

by 1,2,*, 1, 3, 1 and 2
1
Key laboratory of Advanced Electrical Engineering and Energy Technology, Tiangong University, Tianjin 300387, China
2
School of Engineering, the University of Edinburgh, Edinburgh EH9 3JL, UK
3
State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(17), 2771; https://doi.org/10.3390/rs12172771
Received: 21 July 2020 / Revised: 22 August 2020 / Accepted: 24 August 2020 / Published: 26 August 2020
(This article belongs to the Section Environmental Remote Sensing)
Remote chemical detection in the atmosphere or some specific space has always been of great interest in many applications for environmental protection and safety. Laser absorption spectroscopy (LAS) is a highly desirable technology, benefiting from high measurement sensitivity, improved spectral selectivity or resolution, fast response and capability of good spatial resolution, multi-species and standoff detection with a non-cooperative target. Numerous LAS-based standoff detection techniques have seen rapid development recently and are reviewed herein, including differential absorption LiDAR, tunable laser absorption spectroscopy, laser photoacoustic spectroscopy, dual comb spectroscopy, laser heterodyne radiometry and active coherent laser absorption spectroscopy. An update of the current status of these various methods is presented, covering their principles, system compositions, features, developments and applications for standoff chemical detection over the last decade. In addition, a performance comparison together with the challenges and opportunities analysis is presented that describes the broad LAS-based techniques within the framework of remote sensing research and their directions of development for meeting potential practical use. View Full-Text
Keywords: laser absorption spectroscopy; remote sensing; standoff detection; non-cooperative target; mid-infrared laser absorption spectroscopy; remote sensing; standoff detection; non-cooperative target; mid-infrared
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MDPI and ACS Style

Li, J.; Yu, Z.; Du, Z.; Ji, Y.; Liu, C. Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review. Remote Sens. 2020, 12, 2771. https://doi.org/10.3390/rs12172771

AMA Style

Li J, Yu Z, Du Z, Ji Y, Liu C. Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review. Remote Sensing. 2020; 12(17):2771. https://doi.org/10.3390/rs12172771

Chicago/Turabian Style

Li, Jinyi, Ziwei Yu, Zhenhui Du, Yue Ji, and Chang Liu. 2020. "Standoff Chemical Detection Using Laser Absorption Spectroscopy: A Review" Remote Sensing 12, no. 17: 2771. https://doi.org/10.3390/rs12172771

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