Abstract
Second-harmonic generation and parametric downconversion processes have
been studied as the basis of all-optical logic gates. All possibilities that
are obtainable with both the low and high conversion efficiencies of such
processes have been analyzed here. xor and and gates are also experimentally proven
by using 1-ps pulses at 800 nm within a β-BaB<sub>2</sub>O<sub>4</sub> crystal, reaching conversion efficiencies of as high as 80%. Based
on these phenomena, complex algebraic operations are proposed for performing
several different logic functionalities particularly concerning network switching
and arithmetic calculation.
© 2008 IEEE
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