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Navigation-grade three-axis resonant fiber-optic gyroscope employing a multiplexed source.

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    Summary

    A novel three-axis resonant fiber-optic gyroscope (RFOG) improves power utilization by reusing light sources. This design achieves navigation-grade performance with suppressed interference and low bias error.

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    Area of Science:

    • Photonics and Optical Engineering
    • Inertial Navigation Systems

    Background:

    • Three-axis gyroscopes are crucial for inertial measurement units (IMUs).
    • Existing designs face challenges in power utilization and inter-axis interference.

    Purpose of the Study:

    • To propose and demonstrate a novel three-axis resonant fiber-optic gyroscope (RFOG) configuration.
    • To enhance power efficiency and minimize bias error in multi-axis RFOGs.

    Main Methods:

    • Utilizing a multiplexed broadband light source where vacant ports serve as drive sources for other axes.
    • Optimizing fiber-optic ring resonator (FRR) lengths to prevent inter-axis interference.
    • Demonstrating a navigation-grade three-axis RFOG with approximately 100m fiber coil length per FRR.

    Main Results:

    • Achieved effective power utilization by reusing light sources.
    • Suppressed the influence of input spectrum on the multiplexed RFOG.
    • Obtained a theoretical temperature dependence of bias error as low as 1.08 × 10-4 °/h/°C.

    Conclusions:

    • The proposed multiplexed RFOG configuration offers a viable solution for high-performance inertial sensing.
    • Optimized FRR lengths effectively mitigate interference and spectral influence.
    • Demonstrated potential for navigation-grade applications through improved power efficiency and accuracy.