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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Generating broadband vortex modes in ring-core fiber by using a plasmonic q-plate.

Jingfu Ye, Yan Li, Yanhua Han

    Optics Letters
    |August 16, 2017
    PubMed
    Summary

    A novel plasmonic q-plate (PQP) enables efficient generation of broadband vortex modes in ring-core fibers. This technology offers tunable topological charges and chirality, with potential for future optical communication networks.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Vortex modes offer unique properties for optical communications.
    • Efficient generation of broadband vortex modes is crucial for advanced optical networks.

    Purpose of the Study:

    • To propose and investigate a mode converter for generating vortex modes in ring-core fibers.
    • To utilize a plasmonic q-plate (PQP) for broadband vortex mode generation.

    Main Methods:

    • A PQP composed of L-shaped resonator (LSR) arrays was designed.
    • Multicore fiber transmitted fundamental modes, modulated by LSR arrays.
    • Ring-core fiber filter was used for broadband vortex mode generation.

    Main Results:

    • Tunable topological charges and chirality of vortex modes were achieved.
    • An 800 nm operation bandwidth (1200-2000 nm) covering O to U bands was demonstrated.
    • Vortex mode separation was addressed using a dual ring-core fiber.

    Conclusions:

    • The proposed PQP-based mode converter efficiently generates broadband vortex modes.
    • The technology supports tunable vortex properties and broad bandwidth operation.
    • This converter has potential for integrating traditional and vortex communication networks.