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High sensitivity optical waveguide accelerometer based on Fano resonance.

Fenghua Wan, Guang Qian, Ruozhou Li

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    Summary

    This study introduces a novel optical waveguide accelerometer using tunable asymmetrical Fano resonance. This device offers significantly enhanced sensitivity for applications in navigation and satellite control.

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    Area of Science:

    • Optoelectronics
    • Optical sensing
    • Interferometry

    Background:

    • Conventional accelerometers face limitations in sensitivity and workspace.
    • Mach-Zehnder interferometers (MZIs) are utilized in various sensing applications.
    • Fano resonance offers a unique optical phenomenon for enhanced sensing.

    Purpose of the Study:

    • To propose and analyze an optical waveguide accelerometer based on tunable asymmetrical Fano resonance.
    • To leverage the high sensitivity of Fano resonance for improved accelerometer performance.
    • To explore potential applications in inertial navigation and satellite attitude control.

    Main Methods:

    • Utilizing a ring-resonator-coupled Mach-Zehnder interferometer (MZI) structure.
    • Exploiting the interference between a high-Q resonance pathway and a coherent background pathway.
    • Analyzing the generation of a steep asymmetric Fano resonance line shape.

    Main Results:

    • Achieved a sensitivity of approximately 111.75 mW/g.
    • Demonstrated a 393-fold increase in sensitivity compared to conventional MZI accelerometers.
    • Sensitivity is comparable to single ring resonator structures.

    Conclusions:

    • The proposed Fano resonance accelerometer exhibits significantly enhanced sensitivity.
    • The device has potential for high-performance inertial navigation and satellite guidance systems.
    • Tunable asymmetrical Fano resonance provides a robust mechanism for sensitive acceleration detection.