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Compact and broadband data exchange for mode-division-multiplexed networks.

Kolsoom Mehrabi, Abbas Zarifkar

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    |June 29, 2019
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    Summary

    This study introduces a compact silicon-on-insulator device for optical data exchange in mode-division multiplexing (MDM) networks. It achieves broadband performance with low loss and crosstalk, crucial for high-capacity data transmission.

    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics
    • Nanophotonics

    Background:

    • Mode-division multiplexing (MDM) is vital for increasing data transmission capacity.
    • Efficient on-chip optical data exchange is a key requirement for advanced optical networks.
    • Existing solutions may lack broadband operation or compactness.

    Purpose of the Study:

    • To design and simulate a novel, compact optical device for broadband data exchange between multiplexed modes.
    • To demonstrate efficient mode conversion and data swapping on a silicon-on-insulator (SOI) platform.
    • To achieve low insertion loss and crosstalk over a wide operational bandwidth.

    Main Methods:

    • Utilized a three-waveguide coupler design incorporating a hybrid plasmonic structure.

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  • Employed 3D finite-difference-time-domain (FDTD) simulations for device analysis.
  • Investigated performance metrics including insertion loss, crosstalk, and bandwidth.

    • Main Results:

    • Achieved broadband operation with insertion loss below 2 dB over a 100 nm bandwidth.
    • Demonstrated low crosstalk: below -14.7 dB for TM0 to TM1 and -21.9 dB for TM1 to TM0 conversion.
    • The proposed device has a compact footprint (15.25 μm length, 1.0885 μm width).

    Conclusions:

    • The developed device offers efficient and broadband on-chip optical data exchange for MDM systems.
    • The hybrid plasmonic approach enables compact and high-performance mode conversion.
    • This technology holds promise for future high-capacity optical communication networks.