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Ultracompact integrated polarizers using bent asymmetric coupled waveguides.

Pedro Chamorro-Posada

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    Summary

    A novel integrated polarizer using bent coupled optical waveguides is proposed. This design offers broadband performance and robustness against fabrication errors for photonic integrated circuits.

    Area of Science:

    • Photonics and Optical Engineering
    • Integrated Optics

    Background:

    • Integrated polarizers are crucial components in photonic integrated circuits (PICs).
    • Existing designs often face challenges with fabrication complexity, broadband operation, and tolerance to manufacturing variations.

    Purpose of the Study:

    • To propose and investigate a new type of integrated polarizer based on bent coupled optical waveguides.
    • To demonstrate the feasibility of realizing such polarizers using standard fabrication techniques.
    • To explore the potential for broadband and robust polarizer designs in PICs.

    Main Methods:

    • Numerical investigation of a deep-etched waveguide silicon nitride TE-pass implementation.
    • Analysis of the physical mechanism underlying the polarizer's operation.
    • Exploration of design flexibility and robustness against fabrication tolerances.

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    Main Results:

    • The proposed device geometry is simple and achievable with basic standard fabrication steps.
    • The design exhibits flexibility for broadband operation.
    • The polarizer demonstrates robustness against fabrication tolerances.

    Conclusions:

    • Bent coupled optical waveguides offer a promising platform for integrated polarizers.
    • The proposed design facilitates the incorporation of design-transparent polarizers into PICs.
    • This approach enhances the practicality and performance of optical components in integrated systems.