Interferometric interrogation of a multicore fiber, two-axis inclinometer

Gary A. Miller; Charles G. Askins; Geoffrey A. Cranch

doi:10.1117/12.835386

5 October 2009 Interferometric interrogation of a multicore fiber, two-axis inclinometer

Gary A. Miller, Charles G. Askins, Geoffrey A. Cranch

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75032R (2009) https://doi.org/10.1117/12.835386
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

Gary A. Miller, Charles G. Askins, and Geoffrey A. Cranch "Interferometric interrogation of a multicore fiber, two-axis inclinometer", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032R (5 October 2009); https://doi.org/10.1117/12.835386

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