Abstract
The possibility of realizing the fundamental logic gates and, or, and not, which operate in parallel through two interlinked interactions of sum- and difference-frequency generations in a single type I crystal, is presented both theoretically and experimentally. Optical bits are encoded and read as amplitude modulation of the harmonics of a Nd:YAG laser. Owing to the excellent optical resolution of the system, data can be encoded at high density. The implementation of an all-optical parallel half-adder is also shown. The output fields can be frequency converted to implement an all-optical looping circuit.
© 2004 Optical Society of America
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