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Writing Bragg Gratings in Multicore Fibers
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    Researchers created the first linear eight-core rectangular multicore fiber. Its shape stability during drawing and potential for reduced crosstalk in heterogeneous designs offer new possibilities for optical communication.

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    Area of Science:

    • Optics and Photonics
    • Materials Science
    • Optical Fiber Technology

    Background:

    • Multicore fibers (MCFs) are crucial for increasing optical fiber transmission capacity.
    • Maintaining fiber cross-section integrity during fabrication is essential for performance.
    • Minimizing crosstalk in MCFs is a key challenge for advanced optical networks.

    Purpose of the Study:

    • To report the fabrication of the first rectangular cross-section multicore fiber.
    • To investigate the cross-sectional stability of this novel fiber during the drawing process.
    • To explore the potential benefits of this design for crosstalk reduction.

    Main Methods:

    • Fabrication of a novel rectangular cross-section multicore fiber with eight cores in a linear arrangement.
    • Experimental analysis of the fiber's cross-sectional geometry before and after the drawing process.
    • Theoretical considerations on the impact of fiber bends on crosstalk in heterogeneous MCFs.

    Main Results:

    • Successful fabrication of the first eight-core linear rectangular multicore fiber.
    • Demonstration that the rectangular cross-section remains largely unchanged after fiber drawing.
    • Identification of potential crosstalk reduction benefits in heterogeneous configurations due to low bend influence.

    Conclusions:

    • The developed rectangular multicore fiber represents a novel advancement in fiber optics.
    • The observed cross-sectional stability is promising for practical applications.
    • The design shows potential for improved performance in optical communication systems, particularly in managing crosstalk.