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Proceedings Paper

Self-Referenced Fiber Optic System For Remote Methane Detection
Author(s): Jacek K. Zientkiewicz
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Paper Abstract

The paper discusses a fiber optic multisensor methane detection system matched to topology and environment of the underground mine. The system involves time domain multiplexed (TDM) methane sensors based on selective absorption of source radiation by atomic/molecular species in the gas sensing heads. A two-wavelength ratiometric approach allows simple self-referencing, cancels out errors arising from other contaminants, and improves the measurement contrast. The laboratory system consists of a high radiance LED source, multimode fiber, optical sensing head, optical bandpass filters, and involves synchronous detection with low noise photodiodes and a lock-in amplifier. Detection sensitivity versus spectral resolution of the optical filters has also been investigated and described. The system performance was evaluated and the results are presented.

Paper Details

Date Published: 29 October 1989
PDF: 7 pages
Proc. SPIE 1120, Fibre Optics '89, (29 October 1989); doi: 10.1117/12.960997
Show Author Affiliations
Jacek K. Zientkiewicz, Lublin Technical University (Poland)

Published in SPIE Proceedings Vol. 1120:
Fibre Optics '89
Peter McGeehin, Editor(s)

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