Handheld, battery-powered near-IR TDL sensor for stand-off detection of gas and vapor plumes |
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| Authors: | R.T. Wainner B.D. Green M.G. Allen M.A. White J. Stafford-Evans R. Naper |
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| Affiliation: | (1) Physical Sciences Inc., 20 New England Business Center, Andover, MA 01810, USA, US;(2) KeySpan Energy Delivery, 201 Rivermoor Street, W. Roxbury, MA 02132, USA, US |
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| Abstract: | ![]()
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 m. Signal and noise sources are analyzed in detail, along with laboratory and field-test data, including known service leaks. Received: 15 April 2002 / Revised version: 4 June 2002 / Published online: 21 August 2002 RID="*" ID="*"Corresponding author. Fax: +1-978/689-3232, E-mail: allen@psicorp.com |
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| Keywords: | PACS: 42.62.Fi 42.48.Wt |
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