High-speed all-optical logic gate using QD-SOA and its application

The scheme to realize high-speed (~250 Gb/s) all-optical Boolean logic gates using semiconductor optical amplifiers with quantum-dot (QD-SOA) is introduced and analyzed in this review. Numerical simulation method was presented by solving the rate equation and taking into account nonlinear dynamics including carrier heating and spectral hole-burning. Binary phase shift keyed signal and on–off keyed signal are used to generate high-speed all-optical logic gates. The applications based on all-optical logic gates such as, all-optical latches, pseudo random bit sequence generation, and all-optical encryption, are also discussed in this review. Results show that the scheme based on QD-SOA is a promising method for the realization of high-speed all-optical communication system in the future.