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Multimode optical switch based on cascaded Mach-Zehnder interferometer waveguides.

Shijie Sun, Yuanhua Che, Yuhang Xie

    Optics Letters
    |October 13, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We developed a novel 1x1 multimode optical switch for four light modes using cascaded Mach-Zehnder interferometers. This device enables efficient mode switching for mode-division multiplexing systems.

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    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Waveguide Devices

    Background:

    • Mode-division multiplexing (MDM) systems require efficient methods for managing multiple optical modes.
    • Existing optical switches often lack the capability to handle multiple spatial modes simultaneously.
    • Developing compact and efficient multimode optical switches is crucial for advancing optical communication technologies.

    Purpose of the Study:

    • To design and demonstrate a 1x1 multimode optical switch capable of switching four distinct optical modes (E11, E21, E12, E22).
    • To investigate the performance of a cascaded Mach-Zehnder interferometer (MZI) architecture for multimode switching.
    • To achieve mode-insensitive switching for specific modes, enabling simultaneous control.

    Main Methods:

    • Fabrication of a 1x1 multimode optical switch using polymer material.
    • Utilizing cascaded Mach-Zehnder interferometers (MZIs) with a primary MZI for mode splitting and secondary MZIs for modulation.
    • Employing thermo-optic effect for switching control.

    Main Results:

    • Successful demonstration of a 1x1 multimode optical switch for E11, E21, E12, and E22 modes.
    • Achieved extinction ratios greater than 10.2 dB for each mode.
    • Demonstrated low power consumption (5.5 mW) and fast response times (<1.28 ms).

    Conclusions:

    • The developed cascaded MZI device effectively performs multimode optical switching for four modes.
    • The device exhibits excellent performance metrics, including high extinction ratios, low power consumption, and rapid response times.
    • This technology holds significant potential for applications in mode-division multiplexing (MDM) systems requiring advanced multimode switching capabilities.