Nonlinear Dynamics in Semiconductor Lasers - Abstract

Capua, Amir

FDTD model for a quantum-dot laser and amplifier under the Maxwell-Schrödinger framework

We describe a finite difference time domain (FDTD) model of aQuantum-Dot (QD) in-a-well based optical gain media under the framework of the Maxwell-Schrödinger equations. The model includes the dynamical behavior of a QD gain medium including the excited state and the carrier rate equations, and considers the carrier dependent refractive index. Most importantly, the model enables to calculate carrier diffusion effects which are usually approximated but turn out to play a key role in long devices. We use the model to study the multimode nature of QD lasers as well as the study of large signal data modulation. Finally, we study the interaction of the QD gain medium with short 150 fs pulses under various degrees of saturation.