Two-photon absorption in quantum dot semiconductor optical amplifiers-based all-optical XOR gate at 2 Tb/s

摘要

The nonlinear effect of two-photon absorption (TPA) on the performance of all-optical XOR gate using quantum dot semiconductor optical amplifiers (QDSOAs)-assisted Mach-Zehnder interferometer is numerically analyzed and investigated at a data rate of 2Tb/s. The dependence of the quality factor (QF) on the critical parameters of the input signal and QDSOA is examined and assessed. The obtained QFs for the all-opticalXOR gate using QDSOAs-MZI at 2Tb/s with TPA and without TPA are 14 and 8, respectively.