Abstract

The degree of paraxiality (DOP) of an electromagnetic multi-Gaussian Schell-model (EM-MGSM) beam was discussed, and the dependence of DOP on the characteristics of beam sources was investigated. It is shown that the parameters of beam sources, including the rms widths of the auto-correlation functions, the degree of polarization, and the boundary characteristics, play an important role in the DOP of the beam. To explain these phenomena, the far-zone divergence angle of the EM-MGSM beam was further discussed.

© 2019 Optical Society of America

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