Opt Express. 2023 Apr 10;31(8):12433-12448. doi: 10.1364/OE.482859.
Cavity optomechanics with picometer displacement measurement resolution has shown vital applications in high-precision sensing areas. In this paper, an optomechanical micro hemispherical shell resonator gyroscope (MHSRG) is proposed, for the first time. The MHSRG is driven by the strong opto-mechanical coupling effect based on the established whispering gallery mode (WGM). And the angular rate is characterized by measuring the transmission amplitude changing of laser coupled in and out from the optomechanical MHSRG based on the dispersive resonance wavelength shift and/or dissipative losses varying. The detailed operating principle of high-precision angular rate detection is theoretically explored and the fully characteristic parameters are numerically investigated. Simulation results show that the optomechanical MHSRG can achieve scale factor of 414.8 mV/ (°/ s) and angular random walk of 0.0555 °/ h when the input laser power is 3 mW and resonator mass is just 98 ng. Such proposed optomechanical MHSRG can be widely used for chip-scale inertial navigation, attitude measurement, and stabilization.
基于建立的 whispering gallery 模式（WGM），利用强光机耦合效应，首次提出了一种光机械微半球壳谐振陀螺（MHSRG）。通过测量激光从光机械 MHSRG 进出时的传输幅度变化，基于色散共振波长移动和/或耗散损耗变化，对角速度进行了表征。从理论上探讨了高精度角速度检测的详细工作原理，并对全特征参数进行了数值研究。仿真结果表明，当输入激光功率为 3mW 且谐振器质量仅为 98ng 时，光机械 MHSRG 可实现 414.8mV/（°/s）的标度因数和 0.0555°/h 的角随机游走。所提出的光机械 MHSRG 可广泛用于片上惯性导航、姿态测量和稳定。
