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High-dimensional Stokes vector direct detection over few-mode fibers.

Honglin Ji, Di Che, Chuanbowen Sun

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    Summary
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    We introduce a novel high-dimensional Stokes vector direct detection (HD-SVDD) receiver. This technology simplifies mode recovery for fiber optic communications without complex coherent detection methods.

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    Area of Science:

    • Optical communications
    • Fiber optics engineering
    • Signal processing

    Background:

    • Direct detection is simpler than coherent detection for optical systems.
    • Mode-division multiplexing (MDM) in few-mode fibers (FMFs) offers higher capacity.
    • Recovering coupled modes in FMFs typically requires complex coherent detection.

    Purpose of the Study:

    • To propose and demonstrate a novel high-dimensional Stokes vector direct detection (HD-SVDD) receiver.
    • To enable mode recovery in MDM transmission without coherent detection.
    • To showcase the feasibility of HD-SVDD for practical fiber optic systems.

    Main Methods:

    • Development of a high-dimensional Stokes vector direct detection (HD-SVDD) receiver architecture.
    • Experimental demonstration of the HD-SVDD receiver.
    • Transmission of dual-spatial and dual-polarization modes in a two-mode fiber.

    Main Results:

    • Successful demonstration of the first high-dimensional Stokes vector reception.
    • Achieved 60 Gb/s data transmission over a 200 m two-mode fiber.
    • Validated mode recovery capability without coherent detection.

    Conclusions:

    • The proposed HD-SVDD receiver offers a simplified approach for mode recovery in MDM systems.
    • This technology advances direct detection methods for high-capacity fiber optic communications.
    • HD-SVDD presents a promising solution for future optical network development.