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Optically functionalized microfiber Bragg grating for RH sensing.

Xinpu Zhang, Xihua Zou, Bin Luo

    Optics Letters
    |October 1, 2019
    PubMed
    Summary
    This summary is machine-generated.

    A new method uses ultraviolet lasers to coat microfibers with polymer films, enabling custom fiber functions. This technique creates a novel fiber optic humidity sensor with fast response and high stability.

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    Area of Science:

    • Materials Science
    • Optoelectronics
    • Polymer Chemistry

    Background:

    • Traditional fiber functionalization methods can be complex and costly.
    • Developing efficient techniques for modifying fiber properties is crucial for advanced applications.
    • Optically induced processes offer precise control over material deposition.

    Purpose of the Study:

    • To introduce a novel optically induced film-forming technique for microfiber functionalization.
    • To demonstrate the control over polymer film thickness via laser irradiation time.
    • To fabricate and validate a functional fiber optic sensor using this method.

    Main Methods:

    • Utilizing the evanescent field of an ultraviolet laser propagating along a microfiber.
    • Employing photopolymerization initiated by laser energy for film deposition.
    • Fabricating a microfiber Bragg grating sensor with a functional polymer film.

    Main Results:

    • Successfully formed polymer films directly onto microfiber surfaces.
    • Demonstrated tunable film thickness by controlling ultraviolet laser irradiation time.
    • Developed a fiber optic relative humidity sensor with fast response, wide measurement range, and high stability.

    Conclusions:

    • Optically induced film formation is an effective method for microfiber functionalization.
    • This technique allows for the creation of custom-functionalized fiber components.
    • The developed polymer film-functionalized microfiber Bragg grating sensor shows significant potential for humidity sensing applications.