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Microresonator-based comb generation without an external laser source.

Adrea R Johnson, Yoshitomo Okawachi, Michael R E Lamont

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    |February 12, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel fiber-microresonator dual-cavity system for simplified broadband optical comb generation. This robust, turn-key source produces wide bandwidth without a continuous-wave pump laser, reducing noise.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • Laser Physics

    Background:

    • Optical frequency combs are crucial for precision measurement and spectroscopy.
    • Conventional comb generation often requires complex setups and continuous-wave (CW) pump lasers.
    • Developing simplified and robust comb generation techniques is an ongoing challenge.

    Purpose of the Study:

    • To demonstrate a novel fiber-microresonator dual-cavity architecture for optical comb generation.
    • To achieve broadband comb generation without a CW pump laser.
    • To investigate the robustness and noise characteristics of the generated combs.

    Main Methods:

    • Utilized a fiber-microresonator dual-cavity system.
    • Employed a novel pumping scheme that eliminates the need for a CW pump laser.
    • Performed temporal and radio frequency (RF) characterization to analyze comb properties.

    Main Results:

    • Successfully generated optical combs with 880 nm bandwidth.
    • Demonstrated simplified comb generation compared to single-frequency laser pumping.
    • Observed a steady comb formation regime with reduced RF amplitude noise.
    • Showcased inherent robustness due to an intrinsic feedback mechanism.

    Conclusions:

    • The fiber-microresonator dual-cavity architecture offers a simplified approach to broadband optical comb generation.
    • The system exhibits inherent robustness and reduced noise, making it a promising alternative to conventional methods.
    • The dual-cavity design is suitable for on-chip integration, paving the way for turn-key broadband multiple wavelength sources.