Semiconductor mode-locked lasers with coherent dual-mode optical injection: simulations, analysis, and experiment

In this paper, we study the dynamics of a passively mode-locked semiconductor laser with dual-frequency coherent optical injection. The locking regions, where the laser pulse repetition rate is synchronized to the separation of the two injected frequencies, were calculated numerically using a delay differential equation model and measured experimentally. Asymptotic analysis performed in the limit of the small injection field amplitude revealed the dependence of the locking regions on the model parameters, such as optical bandwidth, absorber recovery time, and linear losses.