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Proceedings Paper

High sensitivity measurement of NO, NO2 and NH3 using MIR-QCL and time division multiplexing WMS technology
Author(s): Xiang Chen; Chenguang Yang; Mai Hu; Zhenyu Xu; Xueli Fan; Min Wei; Lu Yao; Yabai He; Ruifeng Kan
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Paper Abstract

A compact system based on mid-infrared quantum cascade laser (QCL) operated in room temperature was developed for the simultaneous monitoring of NO, NO2 and NH3 in the air. Laser beams of three QCLs with central wavelength located at 1900 cm-1, 1600 cm-1, 1103.4 cm-1 were coupled to pass through the 60m long gas cell together. With the technology of time division multiplexing, wavelength modulation spectroscopy (WMS) signals of three lasers can be detected at adjacent scan process. The real-time second harmonic analysis was implemented to achieve simultaneous detection of NO, NO2 and NH3. A minimum detection limit (MDL) of 0.2ppb for NO, 0.12ppb for NO2 and 0.1ppb for NH3 with an optimum integration time around 100 seconds can be achieved for this setup. An ambient monitoring of three gasses during 5 hours was performed to inspect the local air quality.

Paper Details

Date Published: 25 October 2016
PDF: 8 pages
Proc. SPIE 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology, 101561J (25 October 2016); doi: 10.1117/12.2247150
Show Author Affiliations
Xiang Chen, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Chenguang Yang, Anhui Institute of Optics and Fine Mechanics (China)
Mai Hu, Anhui Institute of Optics and Fine Mechanics (China)
Zhenyu Xu, Anhui Institute of Optics and Fine Mechanics (China)
Xueli Fan, Anhui Institute of Optics and Fine Mechanics (China)
Min Wei, Anhui Institute of Optics and Fine Mechanics (China)
Univ. of Science and Technology of China (China)
Lu Yao, Anhui Institute of Optics and Fine Mechanics (China)
Yabai He, Anhui Institute of Optics and Fine Mechanics (China)
Ruifeng Kan, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 10156:
Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology

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