Optical frequency combs in SiN hybrid lasers

We model the dynamical behavior of a III-V SiN hybrid laser accounting for the narrowband mirror effective reflectivity. We characterize the laser as a function of bias current and detuning of the laser emission frequency with respect to the effective reflectivity peak. Numerical simulations allow to address the potential physical triggers for longitudinal multimode dynamics. Among these, we assess the mechanism of generation of frequency combs and we preliminarily characterize this regime in terms of bandwidth and line separation.