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    This summary is machine-generated.

    This study presents a novel micro-opto-electro-mechanical system (MOEMS) accelerometer using a Fabry-Pérot interferometer. The closed-loop design enhances measurement range and resolution for precise acceleration detection.

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    Area of Science:

    • Micro-opto-electro-mechanical systems (MOEMS)
    • Optical sensing technologies
    • Inertial measurement units

    Background:

    • Traditional accelerometers face limitations in range and resolution.
    • Fabry-Pérot interferometry offers high sensitivity for displacement sensing.
    • Integrating optical and mechanical elements enables novel sensor designs.

    Purpose of the Study:

    • To develop and characterize a closed-loop MOEMS accelerometer.
    • To leverage Fabry-Pérot interferometry for enhanced acceleration measurement.
    • To demonstrate a silicon-based fabrication process for MOEMS accelerometers.

    Main Methods:

    • Fabrication of a MOEMS accelerometer using silicon-on-insulator (SOI) wafer and bulk micromachining.
    • Formation of a Fabry-Pérot cavity between an optical fiber and a proof mass.
    • Implementation of a closed-loop electrostatic feedback system for proof mass stabilization.
    • Characterization of sensor performance including linearity, sensitivity, and bias instability.

    Main Results:

    • The accelerometer exhibits a linear response within the ±5g range.
    • Closed-loop operation significantly improves the measurement range without compromising resolution.
    • Achieved sensitivity of 1.16 V/g and bias instability of 40 µg in closed-loop mode.

    Conclusions:

    • The developed closed-loop MOEMS accelerometer demonstrates promising performance for acceleration sensing.
    • The Fabry-Pérot interferometer integrated with electrostatic feedback offers a robust platform for high-performance inertial sensing.
    • The bulk micromachining fabrication method is suitable for producing these advanced MOEMS devices.