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Proceedings Paper

Processing Of One-Fiber Interferometric Fiber-Optic Sensor Signals
Author(s): A. Tino Alavie; Barry G. Grossman; Michael H. Thursby
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Paper Abstract

Recent research conducted in the Fiber-Optic Sensor Systems Laboratory at Florida Institute of Technology in fiber-optic strain sensors for use in smart structures has concentrated primarily on one-fiber interferometers. Sensors using this technique are of particular interest because they are rugged and provide reasonable strain sensitivities, typically a thousand times that of microbend sensors, while requiring only a single optical fiber. As in two-fiber interferometers, some method must be used to convert the sensor signal output to an absolute strain value. One technique is to provide active phase tracking to keep the sensor signal output at phase quadrature for maximum sensitivity and to eliminate fringe count uncertainty. This paper contains a description of a technique for active phase tracking in polarimetric sensors composed of high- and low-birefringence fiber using an electro-optic polarization modulator. On-going development of artificial neural processors for processing fiber-optic sensor signals from both polarimetric and few mode sensors, as well as generating control signals for actuators in smart structures, is also discussed.

Paper Details

Date Published: 13 February 1990
PDF: 12 pages
Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); doi: 10.1117/12.963026
Show Author Affiliations
A. Tino Alavie, Florida Institute of Technology (United States)
Barry G. Grossman, Florida Institute of Technology (United States)
Michael H. Thursby, Florida Institute of Technology (United States)

Published in SPIE Proceedings Vol. 1169:
Fiber Optic and Laser Sensors VII
Ramon P. DePaula; Eric Udd, Editor(s)

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