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Angular accelerometer based on a dual-polarization fiber-optic Sagnac interferometer.

Xiangdong Ma, Yanjun Chen, Wenbo Wang

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    We developed a novel fiber-optic angular accelerometer using a dual-polarization Sagnac interferometer. This device offers high sensitivity and broad bandwidth for precise dynamics control in aerospace and seismology.

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    Area of Science:

    • Optics and Photonics
    • Sensor Technology
    • Aerospace Engineering

    Background:

    • Precise dynamics control for aircraft and satellites necessitates high-performance angular accelerometers.
    • Existing angular accelerometers often rely on mechanical structures, limiting their adaptability.

    Purpose of the Study:

    • To introduce a novel angular accelerometer based on a dual-polarization fiber-optic Sagnac interferometer.
    • To demonstrate its high sensitivity, broad bandwidth, and environmental adaptability.

    Main Methods:

    • Implementation of a dual-polarization fiber-optic Sagnac interferometer.
    • Experimental characterization of frequency response and sensitivity.

    Main Results:

    • The fiber-optic angular accelerometer exhibits a flat frequency response from 0.01 to 100 Hz.
    • Achieved sensitivity of 6.6 × 10-8 rad/s2/√Hz.
    • Demonstrated robustness without reliance on mechanical structures.

    Conclusions:

    • The proposed fiber-optic angular accelerometer offers a feasible solution for high-performance angular sensing.
    • This technology has significant potential for advancements in inertial navigation and rotational seismology.