Compact diode-laser-based sensor for detection of atmospheric methane

Haishan Zhao; Reinis Kanders; Robert F. Curl; Frank K. Tittel

doi:10.1117/12.319514

19 August 1998 Compact diode-laser-based sensor for detection of atmospheric methane

Haishan Zhao, Reinis Kanders, Robert F. Curl, Frank K. Tittel

Proceedings Volume 3504, Optical Remote Sensing for Industry and Environmental Monitoring; (1998) https://doi.org/10.1117/12.319514
Event: Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 1998, Beijing, China

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/Hz^1/2 was performed and detection sensitivity was limited by intensity noise.

Citation Download Citation

Haishan Zhao, Reinis Kanders, Robert F. Curl, and Frank K. Tittel "Compact diode-laser-based sensor for detection of atmospheric methane", Proc. SPIE 3504, Optical Remote Sensing for Industry and Environmental Monitoring, (19 August 1998); https://doi.org/10.1117/12.319514

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