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Precise signal processing schemes for resonator fiber optic gyro (R-FOG) with bipolar digital serrodyne phase modulation technique are proposed. One scheme is to suppress the noise induced by higher harmonics of the frequency used to extract the rotation signal when the bipolar digital serrodyne modulation technique is used. The other scheme is to increase the stability of the control signal for the amplitude adjustment of the phase modulation waveform, in which a lock-in reference waveform with 90° out of phase compared with the modulation waveform is introduced.
Lasers and Electro-Optics (CLEO), 2011 Conference on
Date of Conference: 1-6 May 2011