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Practical quantum access network over a 10 Gbit/s Ethernet passive optical network.

Bi-Xiao Wang, Shi-Biao Tang, Yingqiu Mao

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    Summary
    This summary is machine-generated.

    This study demonstrates a practical quantum access network (QAN) integrated with a 10 Gbit/s Ethernet passive optical network (10G-EPON). This integration enables scalable and cost-effective quantum key distribution (QKD) for multiple users.

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    Area of Science:

    • Quantum communication and networking
    • Information-theoretic security
    • Optical network infrastructure

    Background:

    • Quantum Key Distribution (QKD) offers information-theoretically secure key sharing.
    • Large-scale QKD deployment requires scalable and cost-effective solutions.
    • Quantum Access Networks (QAN) and integration with classical networks are key to reducing costs.

    Purpose of the Study:

    • To present a practical downstream QAN integrated with a 10 Gbit/s Ethernet Passive Optical Network (10G-EPON).
    • To demonstrate coexistence of QAN and 10G-EPON signals for multi-user support.
    • To advance the development of large-scale QKD infrastructure.

    Main Methods:

    • Implementation of a downstream QAN over a 10G-EPON.
    • Testing a full coexistence scheme with a single feeder fiber (21 km).
    • Testing a partial coexistence scheme with a dual feeder fiber (11 km).

    Main Results:

    • Achieved co-propagation of QAN and 10G-EPON signals over 21 km with 9 dB attenuation.
    • Demonstrated a secure key rate of 1.5 kbps per user for 16 users in the full coexistence scheme.
    • Supported a 64-user network capacity in the partial coexistence scheme over 11 km.

    Conclusions:

    • The developed practical QAN over 10G-EPON is a significant step towards large-scale QKD.
    • Coexistence schemes enable efficient integration of quantum and classical optical networks.
    • This integration approach enhances scalability and cost-effectiveness for QKD deployment.