Abstract
The increasing demands in consumer electronics markets have promoted the development of chip-scale optical gyroscopes. In this study, a mode-assisted on-chip silicon-on-insulator interferometric optical gyroscope is proposed and assessed. The proposed gyroscope uses two different spatial modes propagating oppositely in the sensing waveguide coil to form a fixed phase difference that ensures the system operating at the best sensitive point. Compared with conventional schemes, it avoids the phase modulator and the circulator, which are not easy to be integrated in the same platform. The simulated results show that the detectable angular rate reaches 0.64 deg/s with a footprint of 3.85 × 10−3 m2. The experimental results validate the realization of the highly sensitive phase bias of the fabricated device.
Highlights
The optical gyroscope, based on the Sagnac effect[1], is a distinguished technology for angular velocity sensing
The ultralow loss waveguide coil was fabricated on the silicon nitride platform, whereas the phase modulator (PM) was fabricated on the III-V platform and bonded to the silicon layer
We propose a mode-assisted on-chip SOI interferometric optical gyroscope by using two different spatial modes counter propagating in the waveguide sensing coil
Summary
The optical gyroscope, based on the Sagnac effect[1], is a distinguished technology for angular velocity sensing. We propose a mode-assisted on-chip SOI interferometric optical gyroscope by using two different spatial modes counter propagating in the waveguide sensing coil.
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