Double closed-loop resonator fiber optic gyro with improved 
digital serrodyne modulation

Huilian Ma; Xuhui Yu; Zhonghe Jin

doi:10.1117/12.2026050

20 May 2013 Double closed-loop resonator fiber optic gyro with improved digital serrodyne modulation

Huilian Ma, Xuhui Yu, Zhonghe Jin

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87940S (2013) https://doi.org/10.1117/12.2026050
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

A double closed-loop resonator fiber optic gyro (RFOG) with an improved digital serrodyne scheme is experimentally demonstrated. To overcome the effect of the imperfect serrodyne modulation, an improved frequency shifting module is designed and constructed on a single FPGA. The frequency resolution is improved to 0.01Hz, which is equivalent to a rotation rate of 0.04°/h. A bias stability of 2°/h is achieved in a double closed-loop RFOG with a 14.25-m long fiber ring resonator. This is the best result reported to date, to the best of our knowledge, for closed-loop RFOGs. Moreover, good linearity and large dynamic range are also experimentally demonstrated thanks to the closed-loop operation.

Citation Download Citation

Huilian Ma, Xuhui Yu, and Zhonghe Jin "Double closed-loop resonator fiber optic gyro with improved digital serrodyne modulation", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87940S (20 May 2013); https://doi.org/10.1117/12.2026050

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