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Related Experiment Video

Updated: Mar 7, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Microwave photonic phase-tunable mixer.

Tianwei Jiang, Ruihuan Wu, Song Yu

    Optics Express
    |March 1, 2017
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel microwave photonic system enabling tunable frequency up-conversion and down-conversion. The system achieves broadband phase shifts crucial for advanced phase array beamforming applications.

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    Area of Science:

    • Photonics
    • Microwave Engineering
    • Signal Processing

    Background:

    • Traditional microwave photonic systems lack tunable phase control for frequency up-conversion.
    • Phase tunable capability is essential for phase array beamforming.

    Purpose of the Study:

    • To present a novel method for frequency up-conversion and down-conversion with broadband phase tunability.
    • To enable phase-shift capability without optical filters.

    Main Methods:

    • Constructing an optical path with a Hilbert transform function.
    • Utilizing a dual-drive Mach-Zehnder modulator (DMZM).
    • Transferring DMZM bias information from amplitude to phase control.

    Main Results:

    • Demonstrated broadband full-degree phase-shift capability for both up-conversion and down-conversion.
    • Achieved a 360° phase shift for converting intermediate frequency (IF) signals below 4-GHz with radio frequency (RF) signals between 8 and 16-GHz.
    • Eliminated the need for optical filters to achieve phase shifts.

    Conclusions:

    • The proposed Hilbert transform-based microwave photonic system effectively implements tunable frequency conversion.
    • This method offers a practical solution for achieving broadband phase control in photonic systems.
    • The system is suitable for applications requiring precise phase manipulation, such as phase array beamforming.