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Silicon photonic switch-based optical equalization for mitigating pulsewidth distortion.

Yu-Han Hung, Qixiang Cheng, Madeleine Glick

    Optics Express
    |September 11, 2019
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    Summary
    This summary is machine-generated.

    This study introduces a silicon photonic micro-ring resonator (MRR) circuit for optical equalization, significantly improving detection sensitivity by mitigating pulsewidth distortion from driver amplifiers.

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    Area of Science:

    • Photonics
    • Optical Communications
    • Integrated Optics

    Background:

    • Optical transmitters use driver amplifiers, which can introduce pulsewidth distortion.
    • This distortion degrades detection sensitivity and limits the overall optical link budget.
    • Effective equalization is crucial for high-performance optical communication systems.

    Purpose of the Study:

    • To propose and demonstrate a novel optical equalization scheme.
    • To mitigate driver-amplifier-induced pulsewidth distortion using silicon photonics.
    • To enhance detection sensitivity and optimize the optical link budget.

    Main Methods:

    • A silicon photonic micro-ring resonator (MRR)-based switching circuit was designed and fabricated.
    • The circuit integrates spatial optical switching with a two-stage optical bandpass filter for equalization.
    • The scheme was experimentally evaluated for its effectiveness in mitigating pulsewidth distortion.

    Main Results:

    • A 4.5-dB enhancement in detection sensitivity was achieved at a data rate of 12.5 Gbits/s.
    • The proposed optical equalization scheme effectively compensated for pulsewidth distortion.
    • The system demonstrated robustness to varying distortion levels without complex signal processing.

    Conclusions:

    • The novel MRR-based optical equalization circuit successfully mitigates driver-amplifier-induced pulsewidth distortion.
    • This approach offers significant improvements in detection sensitivity and link budget.
    • The adaptable MRR parameters suggest potential for supporting higher data rates in optical communication.