The possibility of restructuring the spectral density of a random light beam up to three times along the propagation path in free space is demonstrated. This can be achieved by prescribing special correlations and different twist factors (by magnitude and/or direction) in the two mutually orthogonal electric field components in the source plane. We also show that the degree of polarization of such a light beam can rotate or not on propagation.

中文翻译：

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具有结构相关性的扭曲EM光束

证明了在自由空间中沿传播路径将随机光束的光谱密度重构为三倍的可能性。这可以通过在源平面中的两个相互正交的电场分量中规定特殊的相关性和不同的扭曲因子（按大小和/或方向）来实现。我们还表明，这种光束的偏振度可以随传播而旋转或不旋转。