New hybrid integrated resonant optical gyroscope

A new hybrid integrated resonant optical gyroscope was presented. All the passive optical elements were fabricated on a single silicon substrate. The active part, which concludes only the laser and photodetectors, was mounted to the waveguide with flip-flop process. The main advantage of the construction was removing the external modulator, and it brings the integration to a new level. For the proposed hybrid integrated optical gyro, an alternative modulation/demodulation method was described in detail. High frequency square waveform modulation wave was assigned to the injection current port of the laser to obtain the frequency modulation. When the gyro rotates, the resonator curve of the two directions departs, resulting in square-wave output, which can be detected to obtain the angular velocity. This work has a big contribution to the integrated optical gyro system.