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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Nonlinear Fourier transform based optical communication systems with FBMC wave-carriers.

Muyiwa Balogun, Liam Barry, Stanislav Derevyanko

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    |January 29, 2025
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    Summary
    This summary is machine-generated.

    This study introduces the Physical Layer for Dynamic Spectrum Access (PHYDYAS) as a novel wave-carrier for nonlinear Fourier transform (NFT) systems. PHYDYAS enhances achievable information rates and improves noise resilience in optical communications.

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    Area of Science:

    • Optical Communications
    • Signal Processing

    Background:

    • Nonlinear Fourier Transform (NFT) transmission schemes show promise for optical communications.
    • Nonlinear Frequency Division Multiplexing (NFDM) offers nonlinearity and dispersion immunity but faces challenges with achievable information rate (AIR) and amplifier noise.

    Purpose of the Study:

    • To investigate the use of Physical Layer for Dynamic Spectrum Access (PHYDYAS) as a wave-carrier in NFT-based systems.
    • To compare the performance of PHYDYAS wave-carriers against Hermite-Gaussian (HG) based NFT schemes.

    Main Methods:

    • Implemented PHYDYAS, a filter bank multi-carrier (FBMC) method, as a wave-carrier in NFT systems.
    • Evaluated system performance based on achievable information rate (AIR) and resilience to inline amplifier noise.
    • Benchmarked against traditional sinc-, root-raised cosine-, and HG-based NFT schemes.

    Main Results:

    • The PHYDYAS-based NFT system achieved a high AIR of up to 7.2 bits/symbol.
    • Demonstrated superior resilience to inline amplifier noise compared to HG-based NFT methods.
    • PHYDYAS offers a significant improvement over existing NFT wave-carrier approaches.

    Conclusions:

    • PHYDYAS is a viable and high-performing wave-carrier for NFT-based optical communication systems.
    • The proposed scheme effectively addresses limitations in AIR and noise sensitivity of current NFT technologies.
    • This advancement paves the way for more robust and efficient optical transmission.