Signal processing improvement of passive resonant fiber optic gyroscope using a reciprocal modulation-demodulation technique

Authors:
  • HLHanzhao Li
    Hanzhao Li
  • YLYi Lin
    Yi Lin
  • LLLu Liu
    Lu Liu
  • HMHuilian Ma
    Huilian Ma
  • ZJZhonghe Jin
    Zhonghe Jin
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Abstract
A resonant fiber optic gyroscope (RFOG) based on the reciprocal phase modulation-demodulation technique is proposed and demonstrated. The residual amplitude modulation induced error of the phase modulator, and the effect of laser frequency noise are all suppressed thanks to the reciprocity of the proposed signal processing scheme. Compared with the past separate modulation-demodulation RFOG, the angular random walk is improved by a factor of 15 times from 0.08°/√h to 0.0052°/√h, and the bias stability is improved from 0.3°/h to 0.06°/h.
Funding Information
  • National Natural Science Foundation of China (61377101, 61675181)

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