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    A new model for partially coherent light sources was developed using second-order coherence theory. This model helps assess spatiotemporal coherence in broadband optical systems.

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    Area of Science:

    • Optics and Photonics
    • Coherence Theory

    Background:

    • Partially coherent light sources are crucial in various optical applications.
    • Understanding spatiotemporal coherence is essential for broadband optical systems.

    Purpose of the Study:

    • Introduce a new class of partially coherent model sources.
    • Analyze spectral and temporal coherence properties of these sources.
    • Facilitate the assessment of spatiotemporal coherence in broadband optical systems.

    Main Methods:

    • Utilized second-order coherence theory for nonstationary optical fields.
    • Developed a model source with frequency-dependent spatial coherence.
    • Investigated spectral coherence properties of supercontinuum pulse trains.

    Main Results:

    • Demonstrated broadband light exhibiting high spatial coherence.
    • Showcased variable spectral and temporal coherence properties.
    • Confirmed reduced spatiotemporal coherence in the time domain.

    Conclusions:

    • The new model sources are effective for analyzing spatiotemporal coherence.
    • The model is applicable to broadband light, including supercontinuum pulses.
    • Provides a convenient tool for optical system design and analysis.