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Adiabatically-tapered fiber mode multiplexers.

S Yerolatsitis, I Gris-Sánchez, T A Birks

    Optics Express
    |February 12, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed simple all-fiber three-mode multiplexers by merging three single-mode cores. This technique enables efficient light manipulation for advanced optical applications.

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    Area of Science:

    • Optics and Photonics
    • Fiber Optics Technology

    Background:

    • Mode multiplexing is crucial for increasing optical fiber capacity.
    • Existing methods for creating few-mode fibers can be complex and costly.

    Purpose of the Study:

    • To demonstrate a simple and effective method for fabricating all-fiber three-mode multiplexers.
    • To achieve efficient excitation and high mode purity for the LP01 and LP11 modes.

    Main Methods:

    • Adiabatic merging of three dissimilar single-mode cores into a single multimode core.
    • Fabrication via collapsing air holes in a photonic crystal fiber.
    • Alternative fabrication using fused and tapered telecom fibers within a fluorine-doped silica capillary.

    Main Results:

    • Successfully created all-fiber three-mode multiplexers with low insertion loss (<0.3 dB for LP01, <0.7 dB for LP11 modes).
    • Achieved high mode purities exceeding 10 dB for all excited modes.
    • Demonstrated the feasibility of merging dissimilar cores for mode control.

    Conclusions:

    • The proposed adiabatic merging technique offers a straightforward approach to fabricating few-mode fiber devices.
    • The developed multiplexers show excellent performance in terms of loss and mode purity.
    • Future work could explore scaling to higher-order modes by optimizing fiber design.