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Resonant microsphere gyroscope based on a double Faraday rotator system.

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    A novel resonant microsphere gyroscope (RMSG) uses a double Faraday rotator system to significantly reduce noise and errors. This advancement improves bias stability and scale factor linearity for enhanced gyroscope performance.

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    Area of Science:

    • Optical physics
    • Microsystems engineering

    Background:

    • Resonant microsphere gyroscopes (RMSG) are sensitive inertial sensors.
    • Traditional RMSGs face challenges with noise and polarization errors impacting performance.

    Purpose of the Study:

    • To propose and validate a resonant microsphere gyroscope (RMSG) utilizing a double Faraday rotator system.
    • To enhance RMSG performance by suppressing backscattering noise and polarization errors.

    Main Methods:

    • Implementation of a double Faraday rotator system within the RMSG.
    • Application of echo suppression structure and orthogonal polarization methods.
    • Optimization of parameters to minimize resonance asymmetry.

    Main Results:

    • Achieved low insertion losses without compromising system reciprocity.
    • Reduced backscattering noise and polarization error below the system sensitivity limit.
    • Decreased resonance asymmetry rate from 34.2% to 2.9% post-optimization.
    • Attained a bias stability of 0.04°/s for a 10s integration time over 1000s.

    Conclusions:

    • The proposed double Faraday rotator system effectively enhances RMSG performance.
    • Optimized noise suppression significantly improves bias stability and scale factor linearity.
    • The developed RMSG demonstrates high potential for precise inertial sensing applications.