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Broadband source-driven resonant integrated optical gyroscope using a low modulation frequency.

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    Area of Science:

    • Photonics and optical engineering
    • Inertial sensing technologies
    • Micro-optics and microcavity devices

    Background:

    • Resonant integrated optical gyroscopes (RIOGs) are key for high-precision, miniaturized inertial devices.
    • Traditional RIOGs require high modulation frequencies (MHz range) for noise suppression, complicating signal processing.
    • Broadband sources offer potential for improved RIOG performance.

    Purpose of the Study:

    • To propose and experimentally validate a broadband source-driven RIOG scheme using low modulation frequencies.
    • To overcome the limitations of high-frequency modulation in conventional RIOGs.
    • To enhance the practical applicability of miniaturized, high-precision optical gyroscopes.

    Main Methods:

    • Implemented a broadband source-driven RIOG scheme with low modulation frequencies (300 kHz).
    • Utilized an optical cancellation method for noise suppression.
    • Employed a whispering gallery mode microcavity (WGMR) supporting multiple modes (seven modes within one FSR).

    Main Results:

    • Achieved an angle random walk (ARW) of 0.17°/√h.
    • Demonstrated a 6 dB performance improvement compared to conventional schemes.
    • Successfully reduced modulation frequency requirements while maintaining high measurement precision.

    Conclusions:

    • The proposed RIOG scheme effectively reduces modulation frequency requirements.
    • This approach offers an innovative solution for practical engineering applications of miniaturized, high-precision optical gyroscopes.
    • The method provides a pathway to overcome traditional signal processing challenges in optical gyroscopes.