Combining silicon-based lithium niobate modulator and silicon-based Si3N4 resonator with silicon-based photonics technology, a highly systematic design of hybrid integrated optical gyroscope with enhanced reciprocity sensitivity and dual micro-ring structure is proposed for the first time in the paper, and the relationship between device’s structural parameters and optical performance is analyzed by constructing a complete simulation link, which provides a theoretical design reference for improving the system sensitivity. When the wavelength is 1550 nm, conversion frequency of the dual-ring optical path is 50 MHz, coupling coefficient is 0.2, and the radius R is 1000 μm, the quality factor of the silicon-based Si3N4 resonator is 2.58×105, which is 1.58 times that of the silicon on insulator resonator. Besides, the effective number of times the light travels around the ring before leaving the micro-ring is 5.93, which is 1.62 times that of the silicon on insulator resonator. The work fits the gyro dynamic output diagram, and solves the problem of low sensitivity at low speed by setting the phase offset. The results provide a basis for the further optimization of design and chip processing of the integrated optical gyroscope.
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