Abstract
Silicon-based epitaxial quantum dot (QD) lasers with strong tolerance for back-reflections have paved the way for developing isolator-free photonics integrated circuits (PICs). This remarkable feature is attributed to the peculiar benefits of QDs, including a large material gain, a strong damping, and a small linewidth enhancement factor [1]. The laser performance can also be optimized by applying p-modulation doping in the active region [1]. In a previous study, the sensitivity of epitaxial QD lasers on silicon subject to short- and long-delay optical feedback were performed [2]. On the top of that, a further investigation of the feedback dynamics on the intra- and inter-chip scale is of significant importance for photonic integration applications.