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Proceedings Paper

Open-path quantum cascade laser-based system for simultaneous remote sensing of methane, nitrous oxide, and water vapor using chirped-pulse differential optical absorption spectroscopy
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Paper Abstract

Methane and Nitrous Oxide are long-lived greenhouse gases in the atmosphere with significant global warming effects. We report on application of chirped-pulsed quantum cascade lasers (QCLs) to simultaneous measurements of these trace gases in both open-path fence-line and backscatter systems. The intra-pulse thermal frequency chip in a QCL can be time resolved and calibrated to allow for high resolution differential optical absorption spectroscopy over the spectral window of the chip, which for a DFB-QCL can be reach ~2cm-1 for a 500 nsec pulse. The spectral line-shape of the output from these lasers are highly stable from pulse to pulse over long period of time (> 1 day), and the system does not require frequent calibrations.

Paper Details

Date Published: 16 October 2015
PDF: 7 pages
Proc. SPIE 9640, Remote Sensing of Clouds and the Atmosphere XX, 96400P (16 October 2015); doi: 10.1117/12.2195169
Show Author Affiliations
Paulo Castillo, Broohkaven National Lab. (United States)
Adrian Diaz , City College of New York (United States)
Benjamin Thomas, City College of New York (United States)
Barry Gross, City College of New York (United States)
Fred Moshary, City College of New York (United States)

Published in SPIE Proceedings Vol. 9640:
Remote Sensing of Clouds and the Atmosphere XX
Adolfo Comerón; Evgueni I. Kassianov; Klaus Schäfer, Editor(s)

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