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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Cross-phase modulation induced microcomb generation in the normal-dispersion region.

Bofan Yang, Yiyang Lu, Shangyuan Li

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    |August 2, 2024
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    Summary
    This summary is machine-generated.

    Researchers developed a new method for generating optical frequency combs in normal-dispersion microresonators. This technique simplifies device design and control by using bidirectional pumping, enabling flexible microcomb generation.

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    Area of Science:

    • Photonics and Optical Engineering
    • Nonlinear Optics
    • Quantum Optics

    Background:

    • Microcomb generation typically requires complex, custom-designed microresonators.
    • Mode interactions in specially designed devices are often necessary for frequency comb formation.
    • Existing methods increase device complexity and control challenges.

    Purpose of the Study:

    • To demonstrate a novel and simplified scheme for microcomb generation.
    • To overcome the limitations of conventional methods in normal-dispersion regimes.
    • To provide a universal pathway for flexible frequency comb generation.

    Main Methods:

    • Utilizing bidirectional pumping of an ordinary normal-dispersion microresonator.
    • Leveraging cross-phase modulation from counter-propagating light to reshape cavity response.
    • Initiating modulational instability for comb formation through controlled pumping.

    Main Results:

    • Successfully generated frequency combs in a standard normal-dispersion microresonator.
    • Demonstrated that bidirectional pumping facilitates modulational instability.
    • Showed that comb generation is achievable at any pumped resonance by adjusting pump parameters.
    • Established a flexible and universal method for microcomb generation.

    Conclusions:

    • The proposed bidirectional pumping scheme offers a simplified approach to microcomb generation.
    • This method bypasses the need for specialized microresonators and complex mode interactions.
    • It provides a versatile platform for generating frequency combs in the normal-dispersion regime.