Open-Loop Experiments in a Resonator Fiber-Optic Gyro Using Digital Triangle Wave Phase Modulation

A resonator fiber-optic gyro (R-FOG) is a high accuracy inertial rotation sensor based on the Sagnac effect. We construct an open-loop operation R-FOG based on the digital triangle wave phase modulation technique, which is free of pulse noise induced by phase reset and also advantageous of reducing the backscattering noise. Experimental results show that the dynamic range and the bias drift of the R-FOG are 3.37 and 0.012 rad/s over 5 s, respectively.