Abstract
We report a 2D static binary phase Dammann vortex grating that combines the features of a conventional vortex grating and a Dammann grating. This grating uniformly distributes energies among the diffraction orders, so the low-efficiency problem at higher diffraction orders of conventional vortex gratings is resolved and the detection range of the optical vortices (OVs) is greatly increased. Experimental results of OV detection using a fabricated Dammann vortex grating are given, and the topological charge detection range from to is achieved. The potential applications of such gratings include transmitting, receiving, and multiplexing OV beams in optical communication systems.
© 2010 Optical Society of America
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