@inproceedings{ef71f03613b845338bc5077065401548,
title = "Differential phase tracking applied to Bragg gratings in multicore fiber for high accuracy curvature measurement",
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 x 10(-3) m(-1), and an AC curvature resolution of 1.2 x 10(-4) m(-1)/Hz(1/2) are reported.",
keywords = "phase tracking, multicore, optical fiber sensor, fiber Bragg grating, interterometry, curvature measurement, Bragg gratings",
author = "Flockhart, \{Gordon M. H.\} and Cranch, \{Geoffrey A.\} and Kirkendall, \{Clay K.\}",
note = "Smart Structures and Materials 2006 Conference, San Diego, CA, FEB 27-MAR 02, 2006; Smart Structures and Materials 2006 Conference ; Conference date: 27-02-2006 Through 02-03-2006",
year = "2006",
doi = "10.1117/12.657576",
language = "English",
series = "Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE)",
publisher = "SPIE",
editor = "D Inaudi and W Ecke and B Culshaw and KJ Peters and E Udd",
booktitle = "Smart Structures and Materials 2006",
address = "United States",
}