Dynamics of two mutually coupled semiconductor lasers in low coupling regions

Abstract

We study a system of two mutually delay-coupled semiconductor lasers for integration in a Photonic Integrated Circuit. This system is described by single mode rate equations, which are a system of delay differential equations with one fixed delay. A comprehensive frequency analysis presented, which predicts stable symmetric and symmetry-broken one-colour, periodic, quasi-periodic and undamped relaxation oscillation states for low coupling regions. These states are confirmed with the obtained bifurcation diagrams. The obtained frequencies are benchmarked against the experimental outcomes.