Abstract

This paper discusses the speckle structures of the radiation of multimode fiber lightguides in the presence of optical vortices. It is shown that the interference pattern of the radiation of optical vortices with an identical direction of rotation creates a speckle structure whose speckles rotate as the plane of observation is displaced close to the surface of the output end. The effect of various factors on the spatial characteristics of the speckle structures is considered.

© 2015 Optical Society of America

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