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Related Concept Videos

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
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Updated: Jan 4, 2026

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Kernel mapping for mitigating nonlinear impairments in optical short-reach communications.

Lu Zhang, Xiaodan Pang, Aleksejs Udalcovs

    Optics Express
    |November 6, 2019
    PubMed
    Summary

    This study introduces kernel mapping to mitigate nonlinear impairments in high-speed optical communication systems. The method achieves performance comparable to Volterra filtering, enhancing data transmission capacity.

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    Area of Science:

    • Optoelectronics
    • Optical Communications
    • Signal Processing

    Background:

    • Nonlinear impairments from opto-electronic components limit performance in high-speed optical short-reach communications.
    • These impairments significantly hinder capacity improvements in optical systems.

    Purpose of the Study:

    • To propose and demonstrate a novel kernel mapping function for mitigating nonlinear impairments in optical communication systems.
    • To analyze the operation principle of the kernel mapping technique.

    Main Methods:

    • Employing a kernel mapping function to map signals into a reproducing kernel Hilbert space.
    • Implementing an intensity modulation/direct detection system using a 1.5-µm vertical cavity surface emitting laser and 10-km 7-core fiber.
    • Comparing the performance of kernel mapping schemes with the Volterra filtering scheme.

    Main Results:

    • Achieved a data rate of 540.68 Gbps (net-rate 505.31 Gbps) over a 10-km 7-core fiber link.
    • Demonstrated that kernel mapping based schemes effectively mitigate nonlinear impairments.
    • Showcased comparable transmission performance to Volterra filtering, even for high-order nonlinearities.

    Conclusions:

    • Kernel mapping is a viable and effective technique for mitigating nonlinear impairments in optical communication systems.
    • The proposed method offers a promising approach for enhancing capacity in high-speed optical networks.
    • Kernel mapping provides an alternative to traditional methods like Volterra filtering with comparable performance.