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Related Experiment Video

Updated: Jun 22, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Quantum key distribution over an installed multimode optical fiber local area network.

Naoto Namekata, Shigehiko Mori, Shuichiro Inoue

    Optics Express
    |June 9, 2009
    PubMed
    Summary

    Researchers explored using multimode fiber for quantum communication. Quantum key distribution over 550m of multimode fiber achieved a 1.09% quantum bit error rate, showing promise for secure quantum channels.

    More Related Videos

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Area of Science:

    • Quantum Information Science
    • Optical Communications

    Background:

    • Multimode fibers are typically unsuitable for quantum channels due to modal dispersion.
    • Underfilled mode distributions can mitigate modal issues, enabling single-mode-like behavior.

    Purpose of the Study:

    • To investigate the feasibility of using installed multimode fiber for quantum communication.
    • To demonstrate quantum key distribution (QKD) performance over a standard multimode fiber local area network.

    Main Methods:

    • Utilized an extremely underfilled mode distribution for light transmission.
    • Performed quantum key distribution using the BB84 four-state protocol.
    • Transmitted quantum signals over 550 meters of installed multimode optical fiber.

    Main Results:

    • Achieved a quantum bit error rate (QBER) of 1.09% over the 550m link.
    • Demonstrated that multimode fiber can support quantum channel transmission with acceptable error rates.

    Conclusions:

    • Multimode fiber links are a viable option for establishing quantum channels.
    • Underfilled mode transmission in multimode fibers enables practical quantum key distribution.