Abstract

Second-harmonic-generated holograms directly provide the outputs of logical gates and and nand operating on optical bits encoded as amplitude modulations in the object and reference wave fronts. By use of a Nd:YAG laser and a β-barium borate crystal, we realized a real-time half-adder of two one-digit binary numbers. The feasibility of highly parallel operation is also discussed.

© 2000 Optical Society of America

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