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Resonator integrated optic gyro employing trapezoidal phase modulation technique.

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    |February 14, 2015
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    A novel trapezoidal phase modulation (TZPM) technique significantly enhances resonator integrated optic gyro (RIOG) performance. This method achieves a 0.09 deg/s bias stability, marking a breakthrough in gyro technology.

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    Area of Science:

    • Photonics and Optical Engineering
    • Inertial Navigation Systems

    Background:

    • Resonator Integrated Optic Gyros (RIOGs) are crucial for inertial navigation.
    • Existing RIOGs face challenges in bias stability and real-time compensation.
    • Silica waveguide ring resonators are a common platform for RIOGs.

    Purpose of the Study:

    • To introduce and demonstrate a novel trapezoidal phase modulation (TZPM) technique for RIOGs.
    • To improve the bias stability and real-time compensation capabilities of RIOGs.
    • To validate the effectiveness of TZPM through experimental analysis.

    Main Methods:

    • Proposed and analyzed a RIOG employing the TZPM technique.
    • Designed and built a prototype RIOG based on a silica waveguide ring resonator.
    • Conducted experiments to evaluate gyro performance with and without TZPM compensation.

    Main Results:

    • The TZPM technique provides additional system information without complicating the optical circuit.
    • Real-time compensation of gyro output was achieved using the TZPM technique.
    • Experimental results showed a significant reduction in standard deviation after compensation.
    • Achieved a bias stability of 0.09 deg/s with a 10s integration time over 3000s.

    Conclusions:

    • The TZPM technique is viable and effective for enhancing RIOG performance.
    • The demonstrated RIOG achieves the best reported long-term bias stability for silica waveguide ring resonator-based devices.
    • This advancement holds promise for improved inertial navigation systems.