Patent ID: 7742700
Filing Date: 2010-06-22
Classification: H04B

Abstract:
1. A method of creating a topologically multiplexed light beam for use in optical data communications, comprising the steps of: providing at least one information-carrying light beam, each illuminating a first optical element; using the first optical element to deflect the at least one information-carrying light beam into at least one selected direction; providing the at least one information-carrying light beam with a plurality of specific topological charges, resulting in the at least one resultant light beam carrying a superposition of different helical modes suitable for use in optical data communications; and using a second optical element to dissect the at least one resultant beam into a plurality of constituent beams, and wherein the first and second optical elements comprise at least two optical elements, with the second optical element being oriented backwards relative to the first optical element on an optical axis.