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Related Experiment Video

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Simple SSMF-based two-channel MGDM system operating in the 0.8  µm wavelength region.

Sunghyun Bae, Byung Gon Kim, Minsik Kim

    Optics Letters
    |April 1, 2021
    PubMed
    Summary

    This study introduces a cost-effective two-channel mode-group-division-multiplexing (MGDM) system for optical fiber communications. The novel receiver design successfully demonstrates high-speed data transmission with a low bit-error rate.

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    Area of Science:

    • Optical Communications
    • Photonics
    • Signal Processing

    Background:

    • Standard single-mode fiber (SSMF) systems face limitations in data capacity.
    • Mode-group-division-multiplexing (MGDM) offers a potential solution for increasing fiber capacity.
    • Existing MGDM receivers can be complex and costly.

    Purpose of the Study:

    • To propose and demonstrate a simplified, cost-effective two-channel MGDM system.
    • To reduce the number of photodetectors (PDs) required at the receiver.
    • To achieve reliable data transmission for both LP01 and LP11 modes.

    Main Methods:

    • Developed a two-channel MGDM system operating at 0.8 µm over SSMF.
    • Implemented a receiver using only two PDs, a mode filter, and a multiple-input single-output (MISO) equalizer.
    • Detected the LP01 mode signal with a PD and mode filter, and the LP11 mode signal by subtracting the LP01 signal from the multiplexed signal.

    Main Results:

    • Successfully transmitted a 2x28 Gb/s MGDM on-off keying signal at 852.6 nm over 2.2 km of SSMF.
    • Achieved a bit-error rate (BER) below 3.8x10^-3 for both LP01 and LP11 modes.
    • Demonstrated the effectiveness of the simplified receiver design.

    Conclusions:

    • The proposed two-channel MGDM system with a simplified receiver is a viable and cost-effective solution for enhancing optical fiber capacity.
    • The system achieves reliable performance for high-speed data transmission.
    • This approach offers a practical method for upgrading existing fiber infrastructure.