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Proceedings Paper

Expanding the dynamic range of an open loop IFOG
Author(s): Hugo Leonardo Rocha de Lira; Josiel Urbaninho de Arruda
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Paper Abstract

We propose and implement a new modulation and demodulation scheme which allows an open loop Interferometric Fiber Optic Gyroscope (IFOG) to expand its dynamic range, extending the maximum Sagnac phase measurement from the typical π/6 rad to values limited only by the increase of signal to noise ratio when interference approaches the coherence length of the light source. Here we achieve a Sagnac phase measumerent of 116.8 rad keeping the measurement error below 0.1 rad for the whole range. Theoretically, there is no reason the error could not go as low as the typical error of a closed loop IFOG.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963439 (28 September 2015); doi: 10.1117/12.2195843
Show Author Affiliations
Hugo Leonardo Rocha de Lira, Instituto de Estudos Avançados (Brazil)
Josiel Urbaninho de Arruda, Instituto Tecnológico de Aeronáutica (Brazil)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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