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Proceedings Paper

Compact diode-laser-based sensor for detection of atmospheric methane
Author(s): Haishan Zhao; Reinis Kanders; Robert F. Curl; Frank K. Tittel
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Paper Abstract

A portable room-temperature diode laser based on mid-infrared gas sensor was developed for open path measurements of methane in ambient air. This sensor is based on a continuous wave difference-frequency generation in periodically poled LiNbO3 near 3.3 micrometers , pumped by a solitary Fabry Perot type diode laser at 810 nm and a distributed Bragg reflector (DBR) diode laser at 1083 nm. IR frequency tuning between 3045 and 3170 cm-1 was performed by tuning the solitary GaAlAs diode laser. In-situ and open path detection of methane in atmosphere with sensitivity of 18 ppbm/Hz1/2 was performed and detection sensitivity was limited by intensity noise.

Paper Details

Date Published: 19 August 1998
PDF: 9 pages
Proc. SPIE 3504, Optical Remote Sensing for Industry and Environmental Monitoring, (19 August 1998); doi: 10.1117/12.319514
Show Author Affiliations
Haishan Zhao, Tianjin Jinhang Technical Physics Intitute (China)
Reinis Kanders, Rice Univ. (United States)
Robert F. Curl, Rice Univ. (United States)
Frank K. Tittel, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 3504:
Optical Remote Sensing for Industry and Environmental Monitoring
Upendra N. Singh; Huanling Hu; Gengchen Wang, Editor(s)

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