Quantum Dot Passively Mode-Locked Laser Optimization for High-Power and Short Pulses

The performance optimization of monolithic two-section passively mode-locked quantum-dot lasers is investigated using the finite-difference traveling-wave model changing simultaneously the length of the saturable absorber and the cavity reflectivity. We demonstrate that, by properly choosing these two parameters, a reduction in the pulse width from 4.4 ps to 930 fs and an increase in the product of the peak power and the average power from 0.012 to 0.2 W2 were obtained. In addition, clear trends and design guidelines are extracted from the simulation results and explained