13 May 2015 Active stand-off detection of gas leaks using an open-path quantum cascade laser sensor in a backscatter configuration
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Abstract
Fugitive gas emissions from agricultural or industrial plants and gas pipelines are an important environmental concern as they can contribute to the global increase of greenhouse gas concentration. Moreover, they are also a security and safety concern because of possible risk of fire/explosion or toxicity. This study presents gas concentration measurements using a quantum cascade laser open path system (QCLOPS). The system retrieves the path-averaged concentration of N2O by collecting the backscattered light from a scattering target. The gas concentration measurements have a high temporal resolution (68 ms) and are achieved at sufficient range (up to 40 m, ~ 130 feet) with a detection limit of 0.4 ppm for N2O. Given these characteristics, this system is promising for mobile/multidirectional remote detection and evaluation of gas leaks.
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Adrian Diaz, Benjamin Thomas, Paulo Castillo, Barry Gross, Fred Moshary, "Active stand-off detection of gas leaks using an open-path quantum cascade laser sensor in a backscatter configuration", Proc. SPIE 9486, Advanced Environmental, Chemical, and Biological Sensing Technologies XII, 94860I (13 May 2015); doi: 10.1117/12.2179317; https://doi.org/10.1117/12.2179317
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