Differential phase tracking applied to Bragg gratings in multicore fiber for high accuracy curvature measurement

Flockhart, Gordon M. H. and Cranch, Geoffrey A. and Kirkendall, Clay K.; Inaudi, D and Ecke, W and Culshaw, B and Peters, KJ and Udd, E, eds. (2006) Differential phase tracking applied to Bragg gratings in multicore fiber for high accuracy curvature measurement. In: Smart Structures and Materials 2006. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE) . SPIE, USA. (https://doi.org/10.1117/12.657576)

[thumbnail of Flockhart SPIE 6167 2006]
Preview
 PDF. Filename: Flockhart_Differential_phase_tracking_applied_to_BG_in_MCF_for_high_accuracy_curvature_measurement_SPIE_6167_2006.pdf
Final Published Version
License: Unspecified
Download (604kB)| Preview

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.

ORCID iDs

Flockhart, Gordon M. H. ORCID logoORCID: https://orcid.org/0000-0002-8777-7511, Cranch, Geoffrey A. and Kirkendall, Clay K.; Inaudi, D, Ecke, W, Culshaw, B, Peters, KJ and Udd, E
CORE (COnnecting REpositories)