Differential absorption lidar at 1.67 /spl mu/m for the detection of methane gas leakage

Kenjiro Ikuta,Nilesh J Vasa,Yuji Oki, Munenori Maeda,Michihiro Uchiumi

Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference（1999）

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摘要

Differential absorption lidar (DIAL) is very useful for remote sensing of atmospheric molecules. Methane (CH/sub 4/) is one of the greenhouse gases and for the DIAL experiments, the absorption around 3.39 /spl mu/m is usually used. Continuous monitoring of the flamable CH/sub 4/ gas leakage is very important especially in a factory or along a gas pipe line. In the case of such a high concentration monitoring, absorption around 1.67 pm can be used. In this paper, we developed a DIAL system to detect CH/sub 4/ at a wavelength of 1.67 /spl mu/m Infrared (IR) laser source at 1.67 /spl mu/m is easily obtainable and fast photodetectors, such as InGaAs PIN photodiodes are available in this range.

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关键词

chemical variables measurement,infrared detectors,leak detection,optical radar,p-i-n photodiodes,photodetectors,remote sensing by laser beam,spectrochemical analysis,1.67 mum,30 m,500 m,ch/sub 4/,dial experiments,ir laser source,ingaas,ingaas pin photodiodes,concentration monitoring,continuous monitoring,differential absorption lidar,factory,fast photodetectors,flamable ch/sub 4/ gas leakage,gas pipe line,greenhouse gas,methane,methane gas leakage detection,greenhouse gases,remote sensing,infrared

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