All-optical logic AND¿NOR gate with three inputs based on cross-gain modulation in a semiconductor optical amplifier

Abstract We report the realization of a novel all-optical logic AND–NOR gate based on cross-gain modulation (XGM). The used scheme requires only one SOA to perform the logic gate with three input signals. A 8.5 dB dynamic extinction ratio with a switching time of about 650 ps for the rise time and 100 ps for the fall time.

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