  This paper investigates experimentally and numerically the nonlinear dynamics
of an epitaxial quantum dot laser on silicon subjected to optoelectronic
feedback. Experimental results showcase a diverse range of dynamics,
encompassing square wave patterns, quasi-chaotic states, and mixed waveforms
exhibiting fast and slow oscillations. These measurements unequivocally
demonstrate that quantum dot lasers on silicon readily and stably generate a
more extensive repertoire of nonlinear dynamics compared to quantum well
lasers. This pronounced sensitivity of quantum dot lasers to optoelectronic
feedback represents a notable departure from their inherent insensitivity to
optical feedback arising from reflections. Moreover, based on the Ikeda-like
model, our simulations illustrate that the inherent characteristics of quantum
dot lasers on silicon enable rapid and diverse dynamic transformations in
response to optoelectronic feedback. The emergence of these exotic dynamics
paves the way for further applications like integrated optical clocks, optical
logic, and optical computing.
