Partially Coherent Vortex Beams With A Separable Phase
A method for the generation of a wide class of partially spatially coherent vortex beams was proposed. The cross-spectral density of the beams had a separable functional form in polar coordinates. The phase singularities of the spectral degree of coherence of the new beams were studied.
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Bogatyryova, Galina V.; Fel'de, Christina V.; and Polyanskii, Peter V., "Partially Coherent Vortex Beams With A Separable Phase" (2003). Scopus Export 2000s. 1743.