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    Area of Science:

    • Optical networking
    • Telecommunications
    • Signal processing

    Background:

    • Existing optical networks face challenges in supporting multiple users with independent data rates.
    • Asynchronous Optical Code Division Multiple Access (OCDMA) offers a potential solution for flexible network access.

    Purpose of the Study:

    • To propose and demonstrate a novel architecture for transmitting Gigabit Ethernet (GbE) signals using asynchronous incoherent OCDMA.
    • To enable multi-user, random access networks with independent clock/data rates.

    Main Methods:

    • Development of a novel architecture comprising GbE interface, OCDMA transmitter, and OCDMA receiver.
    • Experimental demonstration and performance characterization of the system.
    • Analysis of eye diagrams, bit-error rate, and packet loss rate during real-time file transfer.

    Main Results:

    • Successful demonstration of an asynchronous incoherent OCDMA system transmitting GbE data among multiple users.
    • Each user operated with an independent clock/data rate, achieving random network access.
    • The system effectively addressed the near-far problem, enabling asynchronous signal transmission and detection.

    Conclusions:

    • The proposed architecture provides a viable solution for flexible and efficient GbE signal transmission in multi-user asynchronous OCDMA networks.
    • This work represents a significant advancement in OCDMA technology for high-speed data communication.