Research on Reducing the Influence of Laser Frequency Noise on Resonator Optical Gyro

For resonator optical gyro (ROG), widely used frequency locking method is to adjust the frequency of the light source, which may cause line width enhancement, resulting in low accuracy of the gyro. To avoid this situation, a frequency locking scheme for ROG based on a piezoelectric (PZT) cylinder in the resonator was researched. A transmission-type R-FOG with a PZT cylinder for frequency locking was constructed. After that, contrast experiment was conducted. By using the PZT frequency locking scheme, angle random walk was increased from 0.0069°/√h to 0.0050°/√h, which has significance in the future work of ROG.