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Adaptive electro-optic equalization in low-power coherent-lite interconnects.

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    Applied Optics
    |December 1, 2023
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    Summary
    This summary is machine-generated.

    We developed an adaptive electro-optic equalizer to improve power efficiency in short-reach optical interconnects. This novel equalizer uses an optical filter and electronic controller with a random search algorithm for adaptive adjustments.

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    Area of Science:

    • Optical communications
    • Photonics
    • Signal processing

    Background:

    • Short-reach interconnects face challenges with dispersion and power efficiency.
    • Coherent modulation and detection offer high-speed data transmission.
    • Existing equalizers may lack adaptability or efficiency.

    Purpose of the Study:

    • To propose and evaluate an adaptive electro-optic equalizer for short-reach optical interconnects.
    • To enhance receiver power efficiency in coherent-lite systems.
    • To compensate for linear dispersion in high-speed optical links.

    Main Methods:

    • Developed a two-component equalizer: an optical equalizer filter and an electronic controller.
    • Implemented a random search algorithm for adaptive weight coefficient determination.
    • Conducted extensive simulations on a 120 Gbaud homodyne coherent link.

    Main Results:

    • The proposed equalizer effectively compensates for linear channel dispersion.
    • Simulations demonstrate promising performance in a 120 Gbaud coherent link.
    • The adaptive nature allows for efficient weight coefficient adjustment.

    Conclusions:

    • The adaptive electro-optic equalizer significantly improves power efficiency in short-reach interconnects.
    • This technology is suitable for coherent-lite applications.
    • The random search algorithm provides effective adaptive control.