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Proceedings Paper

Interferometric interrogation of a multicore fiber, two-axis inclinometer
Author(s): Gary A. Miller; Charles G. Askins; Geoffrey A. Cranch
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Paper Abstract

A two-axis inclinometer is created by affixing a glass capillary tube to the end of a multicore fiber, forming the proof mass of a fiber cantilever. As the sensor tilts, fiber Bragg gratings inscribed in individual cores of the multicore fiber experience strain and are interrogated interferometrically. A phase generated carrier demodulation technique is then used to measure the differential phases between cores. Within a measurement cycle, the instrument reports a maximum phase excursion of ±0.55 mrad, corresponding to a curvature uncertainty of ±3.7×10-4 m-1. The experimental calibration and performance of the sensor are presented.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032R (5 October 2009); doi: 10.1117/12.835386
Show Author Affiliations
Gary A. Miller, Naval Research Lab. (United States)
Charles G. Askins, Naval Research Lab. (United States)
Geoffrey A. Cranch, SFA Inc. (United States)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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