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Multiplexing free-space optical signals using superimposed collinear orbital angular momentum states

J. Lin, X.-C. Yuan, S. H. Tao, and R. E. Burge

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Abstract

As a proof of concept, we experimentally demonstrate multiplexing of free-space optical signals in multiple channels labeled with different states of orbital angular momentum. The multiplexing process is carried out by a dynamic liquid-crystal spatial light modulator, while the phase function is calculated by an iterative algorithm. A binary amplitude computer-generated hologram serves as a demultiplexer.

© 2007 Optical Society of America

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