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Related Experiment Video

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High-efficiency lithium niobate optical mode switch using a mode-loop Mach-Zehnder interferometer.

Binjie Wang, Yongheng Jiang, Li Chen

    Optics Letters
    |February 28, 2025
    PubMed
    Summary
    This summary is machine-generated.

    We developed a high-efficiency optical mode switch for mode-division multiplexing in photonic integrated circuits. This device enables faster data transmission in advanced communication systems.

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    Area of Science:

    • Photonics
    • Integrated Optics
    • Optical Communications

    Background:

    • Mode-division multiplexing (MDM) enhances communication capacity by transmitting multiple signals over different optical modes within a single channel.
    • Optical mode switches are crucial components for directing signals in MDM systems.

    Purpose of the Study:

    • To propose and experimentally demonstrate a high-efficiency optical mode switch.
    • To achieve high performance metrics for on-chip optical switching applications.

    Main Methods:

    • Utilized a mode-loop Mach-Zehnder interferometer structure.
    • Fabricated the device on a lithium niobate on insulator (LNOI) platform.

    Main Results:

    • Achieved a low half-wave voltage length product (VπL) of approximately 1.83 V·cm.
    • Demonstrated a high extinction ratio of 22.9 dB.
    • Obtained a fast switching time below 48.3 ps.

    Conclusions:

    • The developed optical mode switch offers high efficiency and speed.
    • This device has significant potential for supporting high-speed data transmission in on-chip MDM systems.