Two-channel fiber Bragg-grating strain sensor with high-resolution interferometric wavelength-shift detection

Alan D. Kersey; Timothy A. Berkoff; William W. Morey

doi:10.1117/12.141334

26 March 1993 Two-channel fiber Bragg-grating strain sensor with high-resolution interferometric wavelength-shift detection

Alan D. Kersey, Timothy A. Berkoff, William W. Morey

Author Affiliations +

Proceedings Volume 1798, Fiber Optic Smart Structures and Skins V; (1993) https://doi.org/10.1117/12.141334
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

We describe results obtained with a two-channel fiber optic grating sensor system using interferometric determination of strain-induced Bragg-wavelength shifts. The system provides high resolution to quasi-static and dynamic strain perturbations of the gratings in the system. Results demonstrating the detection of low frequency (about 1 Hz) strain levels of about 6 nanostrain/sq rt Hz in a 3-point bending flexural beam experiment are presented.

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Alan D. Kersey, Timothy A. Berkoff, and William W. Morey "Two-channel fiber Bragg-grating strain sensor with high-resolution interferometric wavelength-shift detection", Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); https://doi.org/10.1117/12.141334

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