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Updated: Jan 19, 2026

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Non-contact all-fiber optic laser Doppler accelerometer.

Xiongxing Zhang, Yadong Jing, Wei Wang

    Optics Express
    |September 11, 2019
    PubMed
    Summary

    This study introduces a non-contact fiber optic system for measuring acceleration. The novel system achieved high accuracy, with a measurement error better than -3.766% for a piezoelectric oscillator.

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    Area of Science:

    • Optics and Photonics
    • Mechanical Engineering
    • Sensor Technology

    Background:

    • Accurate acceleration measurement is crucial for various applications.
    • Existing methods may have limitations in non-contact or high-precision scenarios.
    • Fiber optic sensing offers potential for robust and sensitive measurements.

    Purpose of the Study:

    • To develop and validate a non-contact all-fiber optic system for acceleration measurement.
    • To assess the system's accuracy and linearity using a piezoelectric oscillator.

    Main Methods:

    • Utilized a fiber delay line within a fiber-optic path.
    • Measured the frequency difference of Doppler-shifted laser light corresponding to object velocities.
    • Employed a fixed time delay for acceleration extraction.
    • Tested the system on a piezoelectric ceramic oscillator driven by an open-loop piezo controller.

    Main Results:

    • Achieved a measurement error of better than -3.766%.
    • Demonstrated a nonlinearity degree of 0.314%.
    • Successfully extracted acceleration data from a moving object with high precision.

    Conclusions:

    • The proposed non-contact all-fiber optic system is effective for acceleration measurement.
    • The system exhibits high accuracy and low nonlinearity, suitable for demanding applications.
    • Fiber optic sensing provides a viable platform for advanced dynamic measurement systems.