Centre for Advanced Photonics & Process Analysis, Ireland

We study experimentally the dynamics of quantum-dot passively mode-locked semiconductor laser under external optical injection. We show that the domains corresponding to different laser operation regimes have different boundaries depending on the sign of the master-slave detuning. The laser, therefore, demonstrates multiple bistabilities and hysteresis in the laser output parameters. The area of hysteresis loop grows with optical injection powers and disappears at sufficiently high injection levels.