Remote gas detection using tunable diode laser spectroscopy with high power rare earth and raman fibre amplifiers

Johnstone, W. and Duffin, K. and Mitchell, David Michael (2008) Remote gas detection using tunable diode laser spectroscopy with high power rare earth and raman fibre amplifiers. In: Photonics 2008: International Conference on Fiber Optics and Photonics, 2008-12-13 - 2008-12-17. (Unpublished)

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Abstract

We report a long-range optical methane sensor to enable remote detection of gas leaks from pipelines and other infra-structure. The system, based on back-scatter from a target surface (e.g. the ground around a pipeline), tuneable diode laser spectroscopy (TDLS) and a high power fibre Raman amplifier, can detect a 1 m cloud of methane with a concentration of 100ppm at a distance of 200m.