Article ID Journal Published Year Pages File Type
733972 Optics & Laser Technology 2010 6 Pages PDF
Abstract

Taking Gaussian Schell-model vortex beams as an example of partially coherent vortex beams, we study the evolution and subwavelength structures of coherence vortices in the focal region. The dependence of coherence vortices on the truncation parameter δ, the normalized coherence length ε and the topological charges m is illustrated numerically. It is found that during the evolution process the innermost m coherence vortices and the saddle points near the coherence vortices always remain in the focal plane.

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Physical Sciences and Engineering Engineering Electrical and Electronic Engineering
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