Multiplexed low-coherence optical fiber sensor system employing threshold peak detection

Alan J. Cormier; Robert E. Renton; Gregorios Gregoriou

doi:10.1117/12.219624

15 September 1995 Multiplexed low-coherence optical fiber sensor system employing threshold peak detection

Alan J. Cormier, Robert E. Renton, Gregorios Gregoriou

Proceedings Volume 2507, Distributed and Multiplexed Fiber Optic Sensors V; (1995) https://doi.org/10.1117/12.219624
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

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.

Citation Download Citation

Alan J. Cormier, Robert E. Renton, and Gregorios Gregoriou "Multiplexed low-coherence optical fiber sensor system employing threshold peak detection", Proc. SPIE 2507, Distributed and Multiplexed Fiber Optic Sensors V, (15 September 1995); https://doi.org/10.1117/12.219624

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