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Coupled optical microresonators for microwave all-optical generation and processing.

Yannick Dumeige, Patrice Féron

    Optics Letters
    |July 16, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Two coupled microresonator systems can generate all-optical microwave signals. Optimized designs ensure frequency stability against resonator fluctuations, enabling integrated optical processing.

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    Area of Science:

    • Photonics and optical engineering
    • Nonlinear optics
    • Integrated photonics

    Background:

    • Coupled microresonators with nonlinear refractive index exhibit self-pulsing.
    • These systems hold potential for all-optical integrated microwave generation.
    • RF signal frequency is typically limited by resonator photon lifetime.

    Purpose of the Study:

    • To investigate self-pulsing behavior in coupled microresonator systems.
    • To demonstrate robust microwave signal generation independent of resonance frequency fluctuations.
    • To explore optical domain processing of generated microwave signals.

    Main Methods:

    • Utilizing coupled microresonator systems with instantaneous nonlinear index.
    • Employing semiconductor microdisks with moderate quality factors (≈10^4) for GHz oscillations.
    • Implementing an optimized design to mitigate resonance frequency sensitivity.
    • Cascading integrated optical filters for signal processing.

    Main Results:

    • Self-pulsing behavior was observed in the coupled microresonator systems.
    • The optimized design rendered the generated signal frequency insensitive to microresonator resonance frequency fluctuations.
    • Generated microwave signals were successfully processed in the optical domain using integrated filters.

    Conclusions:

    • Coupled microresonators are viable for all-optical integrated microwave generators.
    • Optimized designs enhance frequency stability, crucial for practical applications.
    • Integrated optical processing offers a pathway for advanced microwave signal manipulation.