A Proposal for a New Method of Modeling of the Quantum Dot Semiconductor Optical Amplifiers

With the advancement of nanoscale semiconductor technology, semiconductor optical amplifiers are used to amplify and process all-optical signals. In this paper, with the aim of calculating the gain of quantum dot semiconductor optical amplifier (QD-SOA), two groups of rate equations and the optical signal propagating equation are used in the active layer of the device. For this purpose, the related equations are presented coherently. In our model, the rate equations that are ordinary differential equations (ODE) are solved by the Runge-Kutta method. The rate equations are based on the occupation probabilities of the energy levels instead of the carrier densities. On the other hand, the signal propagating equation is a partial differential equation (PDE) and is solved by using the SLICE technique. Therefore, a suitable solution for numerical modeling is presented. Based on the presented method, modeling is implemented in the MATLAB environment. The modeling results show a remarkable accuracy of the model. Also, the proposed model is simple and the runtime is too short in comparison with other similar models