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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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Sensitive Mach-Zehnder interferometric sensor based on a grapefruit microstructured fiber by lateral offset splicing.

Yu Wang, Yan Zhou, Zhengyong Liu

    Optics Express
    |September 10, 2020
    PubMed
    Summary

    A new grapefruit microstructured fiber sensor offers high sensitivity for measuring strain and temperature. This compact, cost-effective device shows promise for various sensing applications.

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    Area of Science:

    • Fiber optics
    • Optical sensing
    • Interferometry

    Background:

    • Microstructured fibers offer unique light-guiding properties.
    • Mach-Zehnder interferometers are sensitive optical measurement tools.
    • Integrating novel fiber structures into interferometers can enhance sensing capabilities.

    Purpose of the Study:

    • To propose and demonstrate a novel inline Mach-Zehnder interferometric (MZI) sensor.
    • To utilize a homemade grapefruit microstructured fiber (GMF) as the sensing element.
    • To investigate the sensing performance of the GMF-based MZI sensor for temperature and strain.

    Main Methods:

    • Fabrication of the grapefruit microstructured fiber (GMF).
    • Construction of the inline MZI sensor by splicing GMF between single-mode fibers.
    • Experimental testing of the sensor's response to temperature and strain variations.
    • Theoretical simulation and mode analysis of the GMF and MZI sensor.

    Main Results:

    • Successful fabrication of the GMF and the GZI-based MZI sensor.
    • Mode analysis and theoretical simulations closely matched experimental outcomes.
    • Achieved high sensitivity: 1.97 pm/μɛ for strain and 37 pm/°C for temperature.

    Conclusions:

    • The proposed GMF-based MZI sensor is a viable and effective sensing device.
    • The sensor exhibits compact size, low cost, and high sensitivity.
    • This technology is a strong candidate for practical sensing applications.