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Proceedings Paper

Differential phase tracking applied to Bragg gratings in multicore fiber for high-accuracy curvature measurement
Author(s): Gordon M. H. Flockhart; Geoffrey A. Cranch; Clay K. Kirkendall
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Paper Abstract

We report interferometric interrogation of fiber Bragg gratings in separate cores of a multicore fiber for high resolution quasi-static and dynamic bend measurements. Two axis curvature measurements are made by measuring the differential strain between three FBG sensors formed in a singlemode four-core fiber using a common interrogating interferometer. Therefore a measurement of the differential phase from each FBG yields the differential strain and compensates for the common-mode random drift of the interrogating interferometer. A DC curvature accuracy of 3.4×10-3m-1, and an AC curvature resolution of 1.2×10-4m-1 / Hz1/2 are reported.

Paper Details

Date Published: 16 March 2006
PDF: 10 pages
Proc. SPIE 6167, Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications, 616701 (16 March 2006); doi: 10.1117/12.657576
Show Author Affiliations
Gordon M. H. Flockhart, SFA Inc. (United States)
Geoffrey A. Cranch, SFA Inc. (United States)
Clay K. Kirkendall, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 6167:
Smart Structures and Materials 2006: Smart Sensor Monitoring Systems and Applications
Daniele Inaudi; Wolfgang Ecke; Brian Culshaw; Kara J. Peters; Eric Udd, Editor(s)

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