Expanding the dynamic range of an open loop IFOG

Hugo Leonardo Rocha de Lira; Josiel Urbaninho de Arruda

doi:10.1117/12.2195843

28 September 2015 Expanding the dynamic range of an open loop IFOG

Hugo Leonardo Rocha de Lira, Josiel Urbaninho de Arruda

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 963439 (2015) https://doi.org/10.1117/12.2195843
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Hugo Leonardo Rocha de Lira and Josiel Urbaninho de Arruda "Expanding the dynamic range of an open loop IFOG", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963439 (28 September 2015); https://doi.org/10.1117/12.2195843

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