Simulation of all-optical logic XNOR gate based on quantum-dot semiconductor optical amplifiers with amplified spontaneous emission
The performance of all-optical logic XNOR gate has been simulated. XNOR operation is realized by using MachZehnder interferometer utilizing semiconductor optical amplifiers (SOAs) with quantum-dot (QD) active region. The study is carried out when the amplified spontaneous emission (ASE) is included. Nonlinear dynamics including carrier heating and spectral hole-burning in the QDSOA are taken into account together with the rate equations in order to realize the all-optical logic XNOR operation. Results show that the XNOR gate is capable of operating at data speed of 250Gb/s with high output quality factor (\(Q\)-factor). The dependence of the output \(Q\)-factor on signals and QDSOAs parameters is also investigated and discussed.
xnor gate quantum-dot semiconductor optical amplifier machzehnder interferometer optical logic