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Characterization of the electromagnetic Gaussian Schell-model beam using first-order interference.

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    We present a novel method to characterize electromagnetic Gaussian Schell-model (EMGSM) beams using interference and correlations. This technique determines the complex degree of electromagnetic coherence for diverse optical applications.

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    Area of Science:

    • Optics and Photonics
    • Electromagnetism
    • Quantum Optics

    Background:

    • Characterizing partially coherent and polarized beams is crucial for optical systems.
    • Electromagnetic Gaussian Schell-model (EMGSM) beams are important models for partially coherent light.
    • Existing methods may not fully capture the complex coherence properties of EMGSM beams.

    Purpose of the Study:

    • To propose and experimentally validate a new method for characterizing EMGSM beams.
    • To determine both magnitude and argument of the complex degree of electromagnetic coherence.
    • To provide a tool for analyzing complex optical beam properties.

    Main Methods:

    • Utilizing first-order interference with polarization-state projections.
    • Employing two-point (generalized) Stokes parameters.
    • Analyzing second-order field correlations.

    Main Results:

    • Successfully characterized an EMGSM beam synthesized using a rotating ground glass diffuser.
    • Demonstrated the ability to determine the complex degree of electromagnetic coherence.
    • Validated the proposed method through experimental synthesis and measurement.

    Conclusions:

    • The proposed method effectively characterizes EMGSM beams.
    • This technique offers a powerful tool for probing partially coherent and polarized beams.
    • Potential applications exist in optical communication and beam propagation research.