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    Modulating supercontinuum laser peak power flattens the blue spectrum, enhancing applications. This technique improves spectral flatness by over 3x, even at reduced pump powers, with minor noise trade-offs.

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    Area of Science:

    • Nonlinear Optics
    • Laser Physics
    • Materials Science

    Background:

    • Supercontinuum sources are crucial for diverse applications.
    • Modulational instability-based sources exhibit spectral dips near the infrared absorption edge.
    • Broader, flatter blue spectra are desired for many applications.

    Purpose of the Study:

    • To improve the spectral flatness of supercontinuum sources.
    • To achieve spectral flatness at reduced pump peak powers.
    • To investigate the impact of input peak power modulation on supercontinuum generation.

    Main Methods:

    • Numerical investigation of high-power, modulational instability-based supercontinuum sources.
    • Modulation of input peak power to generate pump pulse trains.
    • Analysis of spectral properties and power spectral density.

    Main Results:

    • Spectral flatness improved by over a factor of 3 through peak power modulation.
    • Achieved flatter blue spectra with reduced pump peak powers.
    • Observed a slight increase in relative intensity noise as a trade-off.

    Conclusions:

    • Input peak power modulation is an effective method to enhance supercontinuum spectral flatness.
    • This technique offers a pathway to optimize supercontinuum sources for specific applications.
    • Further research can explore optimizing modulation parameters for noise reduction.