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Sinusoidal phase-modulating fiber-optic interferometer fringe with a feedback control system.

Changrong Lv, Fajie Duan, En Bo

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    Summary
    This summary is machine-generated.

    This study introduces a fiber-optic interferometer system for precise displacement measurement. It uses a feedback control system and Fresnel reflection to accurately detect disturbances and control laser signals, proving its practical feasibility.

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    Area of Science:

    • Optoelectronics
    • Optical Metrology
    • Fiber Optics

    Background:

    • Accurate displacement measurement is crucial in various scientific and industrial applications.
    • Existing methods may face limitations in sensitivity or real-time disturbance compensation.

    Purpose of the Study:

    • To present and demonstrate a novel displacement measurement system.
    • To integrate fiber-optic interferometry with a feedback control system for enhanced accuracy.

    Main Methods:

    • Utilizes a fiber-optic interferometer fringe projector.
    • Employs the integrating bucket method for phase/displacement detection.
    • Incorporates Fresnel reflection for disturbance measurement and laser feedback control.

    Main Results:

    • The system successfully measures displacement and detects disturbances.
    • Feedback control based on Fresnel reflection provides real-time error correction.
    • Shared optical paths for output and reflected light ensure signal integrity.

    Conclusions:

    • The developed fiber-optic interferometer system is feasible for precise displacement measurement.
    • The integrated feedback system effectively compensates for disturbances.
    • This method offers a robust solution for dynamic displacement monitoring.