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Related Experiment Video

Updated: Feb 2, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Video-rate centimeter-range optical coherence tomography based on dual optical frequency combs by electro-optic

Jiqiang Kang, Pingping Feng, Bowen Li

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    This study introduces a novel video-rate, centimeter-range optical coherence tomography (OCT) system using dual optical frequency combs. This innovation significantly reduces bandwidth requirements for faster, deeper imaging.

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    Area of Science:

    • Photonics
    • Biomedical Imaging
    • Optical Engineering

    Background:

    • Conventional video-rate, centimeter-range optical coherence tomography (OCT) demands high repetition rate optical sources (>100 kHz) and broadband detectors (>1 GHz).
    • These requirements limit imaging speed and depth in OCT systems.
    • Developing advanced OCT systems with relaxed detection bandwidth is crucial for broader applications.

    Purpose of the Study:

    • To propose and demonstrate a novel video-rate, centimeter-range OCT system.
    • To leverage dual optical frequency combs to overcome bandwidth limitations in conventional OCT.
    • To enable faster and deeper imaging capabilities in OCT.

    Main Methods:

    • Utilized dual optical frequency combs with adjustable repetition rate differences (0-6 MHz) for A-scan rate control.
    • Employed electro-optic modulators to down-convert interference signals from optical to radio-frequency domain via dual comb beating.
    • Developed a LabVIEW program for real-time video-rate operation and imaging.

    Main Results:

    • Achieved a down-converted signal bandwidth of less than 22.5 MHz, a two-order-of-magnitude reduction compared to conventional OCT.
    • Demonstrated centimeter imaging depth using stacked glass samples.
    • Obtained an axial resolution of 158 µm with an effective beating bandwidth of 7 nm (~108 comb lines).

    Conclusions:

    • Dual optical frequency combs offer a promising approach to relax detection bandwidth requirements in fast, long-range OCT.
    • The developed system enables video-rate imaging with centimeter-range depth.
    • This technology paves the way for more accessible and advanced OCT applications.