Using high-frequency noiselike modulation for reducing drift processes in a LiNbO$_{3}$-phase modulator of a fiber-optic gyroscope

In this paper, the phase modulator optical phase drift reduction method is proposed and researched for LiNbO$_{3}$ multi-functional integrated optical chip as a part of a fiber-optic gyroscope. This approach consists of applying a very high-frequency noise signal to a phase modulator in the range from 20 MHz to 100 MHz, which is outside of a fiber-optic gyroscope operating frequency range. The presented method showed that the increase in very high-frequency noise signal voltage up to around 1.7 half-wave voltages of the phase modulator allows decreasing optical phase drift by more than 4 times in the frequency range below 64.5 kHz.