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Wavelength-selective switching using double-ring resonators coupled by a three-waveguide directional coupler.

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    A new optical switch design uses a three-waveguide coupler for selective signal switching. This innovation enables efficient two-color duplex bidirectional communication by separating signals in a single fiber.

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    Area of Science:

    • Photonics
    • Optical Switching
    • Integrated Optics

    Background:

    • Bidirectional communication systems require efficient signal separation.
    • Existing optical switches face challenges in managing simultaneous transmitted and received signals.

    Purpose of the Study:

    • To propose and analyze a novel two-bus coupled-rings 2x2 switch design.
    • To demonstrate selective optical switching using free-carrier tuning.
    • To enable efficient two-color duplex bidirectional communication.

    Main Methods:

    • Theoretical analysis using coupled mode theory.
    • Optical transfer formulae for device modeling.
    • Numerical design on a silicon photonics platform.

    Main Results:

    • A novel two-bus coupled-rings 2x2 switch design is presented.
    • Selective switching is achieved by tuning the bonding resonance mode of a three-waveguide coupler.
    • The anti-bonding mode remains transparent during tuning.

    Conclusions:

    • The proposed switch enables selective optical switching.
    • This design is suitable for silicon photonics applications.
    • The switch can be utilized in two-color duplex bidirectional communication systems for signal separation.