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Optical Engineering

Quantum cascade laser open-path system for remote sensing of trace gases in Beijing, China
Author(s): Anna P. M. Michel; Peter Q. Liu; June K. Yeung; Paul Corrigan; Mary Lynn Baeck; Zifa Wang; Timothy Day; Fred Moshary; Claire F. Gmachl; James A. Smith
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Paper Abstract

Exploiting several key characteristics of quantum cascade (QC) lasers, including wide tunability and room-temperature operation, the Quantum Cascade Laser Open-Path System (QCLOPS) was designed for the detection of a range of trace gases and for field deployment in urban environments. Tunability over a wavelength range from 9.3 to 9.8 µm potentially provides the capability for monitoring ozone, ammonia, and carbon dioxide, a suite of trace gases important for air quality and regional climate applications in urban environments. The 2008 Olympic Games in Beijing, China drew attention to air quality problems in urban environments. Prior to and during the Olympic games, regional air quality modifications through factory shutdowns, car restrictions, and construction halts in Beijing and its surrounding areas created a unique test bed for new sensor technologies such as the QCLOPS sensor. We report the design of this novel, open-path air quality sensor and the results of both laboratory tests and field trials during the 2008 Olympic Games in Beijing, China.

Paper Details

Date Published: 1 November 2010
PDF: 8 pages
Opt. Eng. 49(11) 111125 doi: 10.1117/1.3509316
Published in: Optical Engineering Volume 49, Issue 11
Show Author Affiliations
Anna P. M. Michel, Princeton Institute for the Science and Technology of Materials (United States)
Peter Q. Liu, Princeton Univ. (United States)
June K. Yeung, Princeton Univ. (United States)
Paul Corrigan, The City College of New York (United States)
Mary Lynn Baeck, Princeton Univ. (United States)
Zifa Wang, Institute of Atmospheric Physics (China)
Timothy Day, Daylight Solutions Inc. (United States)
Fred Moshary, The City College of New York (United States)
Claire F. Gmachl, Princeton Univ. (United States)
James A. Smith, Princeton Univ. (United States)

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