Abstract

We propose a new technique for the formation of non-diffracting hollow beam structures using the combination of an axicon lens and a binary multi-sector phase plate. The phase plate provides an azimuthal $\pi$-modulation of the phase of the transmitted wavefront. The produced intensity distribution is well described by a pair of optical vortices having opposite topological charges associated with the number of sectors in the phase plate. The proposed technique forms a spatial intensity pattern with a maximal intensity that is 2 times higher when compared with similar techniques, such as spiral phase plates.

© 2019 Optical Society of America

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