21 September 1994 Multiplexed point and stepwise-continuous fiber grating based sensors: practical sensor for structural monitoring?
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Abstract
The paper describes recent progress on developing a complimentary pair of fiber grating-based sensor methods for structural monitoring. Particular emphasis is placed, firstly, on interrogating arrays of point-sensors based on fiber gratings using an acousto-optic tunable filter and, secondly, on determining the optical path length between these point sensors using optical time domain reflectometry. The combined system is capable of measuring both local and spatially-averaged strain. A new approach which permits the simultaneous measurement of strain and temperature, using superimposed fiber gratings, is presented. Potential applications in aerospace composites are also discussed.
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Ming Gang Xu, Harald Geiger, John P. Dakin, "Multiplexed point and stepwise-continuous fiber grating based sensors: practical sensor for structural monitoring?", Proc. SPIE 2294, Distributed and Multiplexed Fiber Optic Sensors IV, (21 September 1994); doi: 10.1117/12.187385; https://doi.org/10.1117/12.187385
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