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Adiabatic polymer-glass-waveguide all-optical switch.

J Y Chen, S I Najafi

    Applied Optics
    |October 2, 2010
    PubMed
    Summary
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    We developed an all-optical switch using a nonlinear polymer on a glass waveguide. This device exhibits abrupt switching and nonreciprocal properties due to nonlinear wave propagation.

    Area of Science:

    • Photonics
    • Nonlinear Optics
    • Materials Science

    Background:

    • All-optical switches are crucial for high-speed optical communication networks.
    • Nonlinear optical effects in waveguides offer potential for compact switching devices.
    • Asymmetric Y-branch structures can exhibit unique wave propagation characteristics.

    Purpose of the Study:

    • To propose and investigate an adiabatic all-optical switch.
    • To analyze nonlinear wave propagation in an asymmetric Y-branch waveguide.
    • To demonstrate abrupt switching and nonreciprocal properties.

    Main Methods:

    • Utilizing an asymmetric Y-branch ion-exchanged glass waveguide with a nonlinear polymer.
    • Extending the effective-index method for nonlinear waveguide analysis.

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  • Calculating nonlinear dispersion curves and employing the beam propagation method.

    • Main Results:

    • The device exhibits multivalued propagation constants in the tapered region.
    • Abrupt switching behavior and nonreciprocal properties were observed.
    • Simulations confirmed the predicted nonlinear switching phenomena.

    Conclusions:

    • The proposed adiabatic all-optical switch demonstrates efficient nonlinear switching.
    • The device's nonreciprocal properties are advantageous for optical signal processing.
    • This design offers a promising platform for future photonic integrated circuits.