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Related Experiment Video

Updated: Aug 25, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Fiber SPR two-dimensional micro displacement sensor based on the coaxial double waveguide with a conical structure.

Yong Wei, Chen Shi, Chunlan Liu

    Optics Express
    |October 14, 2022
    PubMed
    Summary

    This study introduces a novel fiber surface plasmon resonance (SPR) sensor for two-dimensional micro displacement measurement. The innovative design enables precise detection in both x and y axes, overcoming previous limitations.

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    Last Updated: Aug 25, 2025

    A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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    Published on: September 30, 2019

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    Area of Science:

    • Optoelectronics
    • Nanophotonics
    • Sensor Technology

    Background:

    • Current fiber SPR sensors are limited to one-dimensional displacement sensing.
    • A need exists for advanced sensors capable of two-dimensional micro displacement detection.

    Purpose of the Study:

    • To propose and demonstrate a fiber SPR two-dimensional micro displacement sensor.
    • To achieve precise measurement of micro displacements in both x and y directions using a single fiber optic device.

    Main Methods:

    • Development of a fiber SPR sensor utilizing a coaxial double waveguide with a conical structure.
    • Employing distinct light field modes (horn-shaped and straight beam) from the waveguide's cores for directional sensing.
    • Integration of simulation analysis and experimental validation.

    Main Results:

    • The sensor successfully achieved two-dimensional micro displacement sensing based on SPR.
    • Demonstrated average wavelength sensitivities of 0.0537 nm/µm (x-axis) and 0.315 nm/µm (y-axis).
    • Achieved average light intensity sensitivities of 0.000124 a.u./µm (x-axis) and 0.00277 a.u./µm (y-axis).

    Conclusions:

    • The proposed fiber SPR sensor effectively enables two-dimensional micro displacement measurement.
    • This technology holds significant potential for applications in precision positioning and micro-displacement analysis.