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Arrayed optical switches based on integrated liquid-crystal microlens arrays driven and adjusted electrically.

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    |February 25, 2017
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    A novel arrayed optical switch (AOS) utilizes a liquid-crystal microlens array (LCMA) for beam control. This electrically driven LCMA device offers efficient switching of optical beams in fiber arrays.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Electrical Engineering

    Background:

    • Liquid-crystal microlens arrays (LCMAs) are fundamental components in adaptive optics.
    • Existing arrayed optical switches (AOS) face challenges in integration and cost.

    Purpose of the Study:

    • To propose and demonstrate a new arrayed optical switch (AOS) based on a dual-mode liquid-crystal microlens array (LCMA).
    • To leverage LCMA's electrical tunability for advanced optical switching functionalities.

    Main Methods:

    • Fabrication of a specialized LCMA featuring a microcavity with paralleled electrodes (Indium-Tin-Oxide and patterned Aluminum films on SiO2 wafers).
    • Integration of the LCMA into an arrayed optical switch architecture.
    • Electrical signal application to control the converging/diverging properties of the LCMA for beam switching.

    Main Results:

    • The developed AOS effectively switches optical beams on and off in arrayed fibers using applied voltage signals.
    • Demonstrated dual-mode functionality of the LCMA for beam convergence and divergence control.
    • Successful operation of the AOS with proper voltage signal application.

    Conclusions:

    • The proposed AOS, based on a dual-mode LCMA, offers a viable solution for optical beam switching.
    • The developed AOS exhibits superior integration, lower cost, and suitability for high-power beams compared to conventional AOSs.
    • This work advances the application of LCMAs in optical switching and telecommunications.