期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 75, 期 2-3, 页码 249-254出版社
SPRINGER-VERLAG
DOI: 10.1007/s00340-002-0984-7
关键词
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A handheld, battery-powered tunable-diode-laser sensor platform is described. The sensor is based on frequency modulation (FM) spectroscopy using near-IR diode lasers and passive topographic backscatter from common environmental targets such as buildings, ground and foliage. A specific application to the detection of methane using a 1.65-micron diode laser is described in detail, showing a detection sensitivity sufficient to identify typical leaks from buried residential natural gas service lines at stand-off distances up to 30 in. Signal and noise sources are analyzed in detail, along with laboratory and field-test data, including known service leaks.
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