Abstract
The lithium niobate integrated optical phase modulator(Y wave guide) is the key device in the digital closed-loop fiber optic gyroscope. However, temperature phase drift of it directly affects the stability of the scale factor and produces the bias drift in fiber optic gyroscope. In this manuscript, the thermal resistor was used in the drive circuits of Y wave guide. Due to the characteristic of the thermal resistor, the magnitude of voltage on Y wave guide changed with temperature to compensate the intrinsic temperature drift. This method was proved to improve the performance of fiber optic gyroscopes conveniently by experimental results.
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