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Parabolic-Gaussian Schell-model sources and their propagations.

Adeel Abbas, Jisen Wen, Chenni Xu

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |August 16, 2018
    PubMed
    Summary

    Researchers introduced new parabolic-Gaussian Schell-model (PGSM) sources. These sources can generate unique dark-hollow intensity profiles in optical systems and free space.

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    Area of Science:

    • Optics and Photonics
    • Coherent Beam Propagation

    Background:

    • Partially coherent light sources are crucial in various optical applications.
    • Schell-model sources offer controllable coherence properties.
    • Existing models may not fully capture desired beam characteristics.

    Purpose of the Study:

    • To introduce and characterize a novel class of partially coherent Schell-type sources.
    • To investigate the propagation dynamics of these new sources in linear optical systems.
    • To explore the potential for generating specific intensity profiles.

    Main Methods:

    • Defined a new degree of coherence as a product of Gaussian and parabolic functions.
    • Derived the cross-spectral density function for the proposed sources.
    • Analyzed the beam propagation in free space and through lens systems.

    Main Results:

    • Confirmed the physical validity of the new parabolic-Gaussian Schell-model (PGSM) sources.
    • Derived the general propagating expression for the cross-spectral density.
    • Demonstrated the generation of dark-hollow intensity profiles in various propagation scenarios.

    Conclusions:

    • PGSM sources represent a physically realizable and versatile class of partially coherent sources.
    • These sources exhibit controllable propagation characteristics, leading to dark-hollow beams.
    • The findings have implications for optical beam shaping and manipulation.