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Influence of Radial Step Height of a Spiral Phaseplate on Helical m =1 Mode Generation

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Abstract

The influence of radial step height of a spiral phaseplate on a diffraction structure is considered. The computing results show that if the ideal phase shift for a helical m=1 mode generation is broken, the diffraction pattern generated from a phaseplate is described by superposition of two components: the vortex and incident Gaussian beams.

© 2015 Optical Society of America

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