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Proceedings Paper

Multiplexed low-coherence optical fiber sensor system employing threshold peak detection
Author(s): Alan J. Cormier; Robert E. Renton; Gregorios Gregoriou
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Paper Abstract

A multiplexed, low coherence, dual LED, multimode fiber sensor processing system, for measurement of optical path changes generated within Fabry-Perot field sensors, has been constructed and tested. Differences between reference and field sensor coherence profile peak fringe positions were measured using simple signal thresholding techniques and a 10-channel timer-counter board, triggered and stopped by zero-crossover detection signals. S/N ratio at APD detectors allowed measurement update rates in excess of 40 Hz and resolution better than 1/100th fringe. Range to resolution capability was in excess of 12 X 103:1.

Paper Details

Date Published: 15 September 1995
PDF: 12 pages
Proc. SPIE 2507, Distributed and Multiplexed Fiber Optic Sensors V, (15 September 1995); doi: 10.1117/12.219624
Show Author Affiliations
Alan J. Cormier, Sira Ltd. (United Kingdom)
Robert E. Renton, Sira Ltd. (United Kingdom)
Gregorios Gregoriou, Sira Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 2507:
Distributed and Multiplexed Fiber Optic Sensors V
John P. Dakin; Alan D. Kersey, Editor(s)

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