Hussein Taleb - Department of Electrical Engineering, Islamic Azad University, Najafabad Branch
Kambiz Abedi - Department of Electrical Engineering, Faculty of Electrical and Computer Engineering, Shahid Beheshti University
Saeed Golmohammadi - Nanophotonics Group, School of Engineering-Emerging Technologies, University of Tabriz

The influence of non-uniform current injection on the linear operation of a quantum dot semiconductor optical amplifier (QD-SOA) is investigated and optimal current injection profiles are determined. For this purpose, we have utilized some functions to generate various non-uniform current injection profiles. These profiles have been considered in our numerical calculations, where the rate equation model is employed to construct different characteristics of the QD-SOA. We have found that the gain, as well as the crosstalk of QDSOA is closely related to the variance of the carrier density along the cavity. Simulation results show that non-uniform current injection can be used as a technique for gain enhancement as well as crosstalk suppression

quantum-dot semiconductor optical amplifier (QD-SOA), Non-uniform current injection, Rate equations