Optical fibre sensors for environmental monitoring of trace gases

George Stewart; Gillian Whitenett; Kathryn Atherton; Brian Culshaw; Walter Johnstone

doi:10.1117/12.527028

19 November 2003 Optical fibre sensors for environmental monitoring of trace gases

George Stewart, Gillian Whitenett, Kathryn Atherton, Brian Culshaw, Walter Johnstone

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.527028
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

The work described here concerns the development of fiber sensors and networks for monitoring trace gases such as methane, acetylene, carbon dioxide, carbon monoxide and hydrogen sulphide, all of which are important in environmental or safety monitoring. A 45-point fiber sensor network using a single DFB laser source has been installed on a landfill site to assess the distribution of methane generation across the site, with detection levels from < 100 ppm to 100% methane. The system is currently being extended for carbon dioxide and hydrogen sulphide monitoring. Concurrently, fiber lasers sources are under investigation to provide a single source for several gases using techniques such as mode-locked operation for interrogation of multi-point systems and ring-down spectroscopy for high sensitivity measurements.

Citation Download Citation

George Stewart, Gillian Whitenett, Kathryn Atherton, Brian Culshaw, and Walter Johnstone "Optical fibre sensors for environmental monitoring of trace gases", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.527028

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