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    A novel optomechanical micro hemispherical shell resonator gyroscope (MHSRG) offers high-precision angular rate detection. This innovative sensor utilizes opto-mechanical coupling for applications in chip-scale inertial navigation.

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    Area of Science:

    • Optics
    • Mechanical Engineering
    • Sensor Technology

    Background:

    • Cavity optomechanics enables picometer displacement measurement resolution, crucial for high-precision sensing.
    • Whispering gallery mode (WGM) resonators are established for their sensitivity and integration potential.

    Purpose of the Study:

    • To propose and theoretically explore the first optomechanical micro hemispherical shell resonator gyroscope (MHSRG).
    • To investigate the performance characteristics of the MHSRG for high-precision angular rate detection.

    Main Methods:

    • Utilizing strong opto-mechanical coupling based on WGM.
    • Characterizing angular rate by measuring laser transmission amplitude changes via dispersive resonance wavelength shift and/or dissipative losses.
    • Numerical investigation of characteristic parameters.

    Main Results:

    • The MHSRG demonstrates a scale factor of 414.8 mV/(°/s).
    • Achieves an angular random walk of 0.0555 °/h1/2 under specific conditions (3 mW input laser power, 98 ng resonator mass).

    Conclusions:

    • The proposed optomechanical MHSRG shows significant potential for high-precision angular rate sensing.
    • This technology is suitable for chip-scale inertial navigation, attitude measurement, and stabilization applications.