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An experimental study of a reconfigurable visible light communication (VLC) system, using liquid crystal on silicon-based spatial light modulator, which dynamically offers multicast transmission, for indoor optical wireless communication configuration is presented and experimentally demonstrated. The multicast transmission of the system using holographic spot array generation was achieved through an efficient design of near-field computer generated hologram based on Gerchberg-Saxton (GS) algorithm. The system transmission performance, limited by the spot power nonuniformity, was improved through an optimization of GS algorithm, and the results shown that a significant improvement over 11% has been achieved either in a one-dimensional or two-dimensional spot array generations at a transmission distance of 1.25-2.5 m. This paper provides an efficient approach for the direct implementation of a reconfigurable VLC system based on multisport configuration.

Experimental Study of Reconfigurable Visible Light Communications Based on Holographic Spot Array Generations