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Integrated liquid-crystal-based variable-tap devices for visible-light amplitude modulation.

Milica Notaros, Andres Garcia Coleto, Manan Raval

    Optics Letters
    |February 15, 2024
    PubMed
    Summary
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    We developed novel liquid-crystal-based (LC-based) variable-tap devices for visible-light amplitude modulation. These compact, low-power devices enable tunable light control for future integrated optical systems.

    Area of Science:

    • Optoelectronics
    • Photonics
    • Materials Science

    Background:

    • Integrated photonics requires efficient amplitude modulation.
    • Liquid crystals offer tunable optical properties.

    Purpose of the Study:

    • To propose and demonstrate the first integrated liquid-crystal-based (LC-based) variable-tap devices for visible-light amplitude modulation.
    • To leverage LC birefringence for active tuning of waveguide coupling.

    Main Methods:

    • Device design based on waveguide coupling theory.
    • Fabrication and liquid crystal (LC) packaging.
    • Experimental characterization of amplitude modulation performance.

    Main Results:

    • Demonstrated amplitude modulation with 15.4-dB tap-port extinction.

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  • Operated device with ±3.1 V across a 14-µm length at 637 nm.
  • Achieved a compact, low-power solution for integrated visible-light amplitude modulation.

    • Conclusions:

    • Integrated LC-based variable-tap devices offer a novel approach to visible-light amplitude modulation.
    • These devices are suitable for high-density integrated visible-light systems.
    • The demonstrated performance paves the way for advanced optoelectronic applications.