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Related Experiment Video

Updated: May 7, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Magnetic field sensing based on singlemode-multimode-singlemode fiber structures using magnetic fluids as cladding.

Haotian Wang, Shengli Pu, Ning Wang

    Optics Letters
    |October 2, 2013
    PubMed
    Summary
    This summary is machine-generated.

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    This study introduces enhanced magnetic field sensing using magnetic fluid (MF) and a specialized fiber optic structure. Optimized corrosion of the fiber significantly boosts magnetic field sensitivity for improved sensor performance.

    Area of Science:

    • Optoelectronics
    • Fiber Optics
    • Magnetic Field Sensing

    Background:

    • Magnetic field sensors are crucial in various scientific and industrial applications.
    • Existing fiber optic sensors often face limitations in sensitivity and performance.
    • Magnetic fluids (MF) offer unique properties for sensing applications.

    Purpose of the Study:

    • To propose and investigate a novel magnetic field sensing system.
    • To enhance the sensitivity of singlemode-multimode-singlemode (SMS) fiber sensors using magnetic fluid.
    • To optimize the sensor performance by controlling the corrosion of the SMS fiber structure.

    Main Methods:

    • Fabrication of a singlemode-multimode-singlemode (SMS) fiber structure.
    • Coating the SMS fiber structure with magnetic fluid (MF).

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

    Writing Bragg Gratings in Multicore Fibers
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  • Controlled corrosive etching of the multimode fiber cladding to enhance sensitivity.
  • Characterization of the sensor's response to varying magnetic fields.

    • Main Results:

    • Achieved a maximum magnetic field sensitivity of -16.86 pm/Oe with optimized fiber corrosion.
    • Observed a decrease in interference dip visibility with increased corrosion time.
    • Identified an optimal corrosion time of approximately 1620 seconds for maximum sensing performance.
    • Utilized the figure of merit to comprehensively evaluate sensor performance considering sensitivity and visibility trade-offs.

    Conclusions:

    • The proposed MF-clad SMS fiber sensor demonstrates enhanced magnetic field sensitivity.
    • Optimizing fiber corrosion is key to maximizing sensor performance.
    • The figure of merit provides a balanced evaluation of sensor capabilities.
    • This approach offers a promising avenue for advanced magnetic field sensing technologies.