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All-optical logic operations by means of two interlinked χ interactions in a single crystal

Journal of the Optical Society of America B: Optical Physics, ISSN: 0740-3224, Vol: 21, Issue: 10, Page: 1839-1847
2004
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The possibility of realizing the fundamental logic gates AND, OR, and NOT, which operate in parallel through two interlinked χ interactions of sum- and difference-frequency generations in a single type I β-BaBO crystal, is presented both theoretically and experimentatly. 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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