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High-sensitivity vector magnetic field and temperature sensor based on side-polished GPCF.

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    A novel vector magnetic field sensor was developed using a grapefruit-type photonic crystal fiber (GPCF). This enhanced GPCF sensor offers high sensitivity and rapid response for precise magnetic field detection.

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    Area of Science:

    • Photonics
    • Sensor Technology
    • Materials Science

    Background:

    • Photonic crystal fibers (PCFs) offer unique light-matter interaction properties.
    • Developing compact and sensitive magnetic field sensors is crucial for various applications.

    Purpose of the Study:

    • To experimentally demonstrate a vector magnetic field sensor.
    • To leverage the unique structure of grapefruit-type photonic crystal fiber (GPCF) for enhanced sensing capabilities.

    Main Methods:

    • Utilized a grapefruit-type photonic crystal fiber (GPCF).
    • Incorporated side-polishing to facilitate magnetic fluid interaction with the fiber core.
    • Integrated a magnetic fluid (MF) as the sensing medium.

    Main Results:

    • Achieved a linear magnetic field sensitivity of 1.296 dB/mT (5-15 mT range).
    • Demonstrated an orientation sensitivity of 0.260 dB/° (at 10 mT).
    • Observed a temperature sensitivity of 0.586 dB/°C (24-34°C range).

    Conclusions:

    • The GPCF-based sensor provides high sensitivity and rapid response for vector magnetic field detection.
    • The sensor's compact design and performance show potential for industrial automation and biomedical applications.
    • Structural optimization of GPCF significantly enhances magnetic field sensing capabilities.