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8 × 8 SOA-based optical switch with zero fiber-to-fiber insertion loss.

Hassan Rahbardar Mojaver, Valery Tolstikhin, Bernardo Gargallo

    Optics Letters
    |August 16, 2020
    PubMed
    Summary

    This study reports an 8x8 lossless optical switch using semiconductor optical amplifier (SOA) gates. The novel design achieves error-free 10 Gbps data transmission across all paths, minimizing signal loss.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Telecommunications

    Background:

    • Optical switches are crucial for high-speed data networks.
    • Minimizing signal loss in optical switches is a significant challenge.
    • Semiconductor Optical Amplifiers (SOAs) offer potential for gain integration.

    Purpose of the Study:

    • To design and fabricate a novel 8x8 lossless optical switch.
    • To utilize SOA gates for gain compensation and loss reduction.
    • To characterize the performance of the optical switch at high data rates.

    Main Methods:

    • An 8x8 Banyan switch architecture was implemented using 2x2 switch stages.
    • A total of 48 Semiconductor Optical Amplifiers (SOAs) were integrated.
    • Each optical path incorporated three SOAs for active gain.
    • Error-free transmission tests were conducted using 10 Gbps NRZ PRBS-31 signals.

    Main Results:

    • The fabricated 8x8 optical switch demonstrated lossless operation.
    • All 64 optical paths achieved error-free 10 Gbps NRZ PRBS-31 transmission.
    • A signal-to-noise ratio of at least 30 dB was maintained.
    • The power penalty remained below 0.9 dB across all paths.

    Conclusions:

    • The SOA-based 8x8 optical switch effectively compensates for insertion losses.
    • The demonstrated performance meets requirements for high-speed optical communication systems.
    • This design offers a viable solution for building scalable, low-loss optical switching fabrics.