High sensitivity measurement of NO, NO2 and NH3 using MIR-QCL and time division multiplexing WMS technology

Xiang Chen; Chenguang Yang; Mai Hu; Zhenyu Xu; Xueli Fan; Min Wei; Lu Yao; Yabai He; Ruifeng Kan

doi:10.1117/12.2247150

25 October 2016 High sensitivity measurement of NO, NO₂ and NH₃ using MIR-QCL and time division multiplexing WMS technology

Xiang Chen, Chenguang Yang, Mai Hu, Zhenyu Xu, Xueli Fan, Min Wei, Lu Yao, Yabai He, Ruifeng Kan

Author Affiliations +

Proceedings Volume 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology; 101561J (2016) https://doi.org/10.1117/12.2247150
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China

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.

Citation Download Citation

Xiang Chen, Chenguang Yang, Mai Hu, Zhenyu Xu, Xueli Fan, Min Wei, Lu Yao, Yabai He, and Ruifeng Kan "High sensitivity measurement of NO, NO₂ and NH₃ using MIR-QCL and time division multiplexing WMS technology", Proc. SPIE 10156, Hyperspectral Remote Sensing Applications and Environmental Monitoring and Safety Testing Technology, 101561J (25 October 2016); https://doi.org/10.1117/12.2247150

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available