Effect of Additional Optical Pumping Injection into the Ground-state Ensemble on the Gain and the Phase Recovery Acceleration of Quantum-dot Semiconductor Optical Amplifiers

摘要

The effect of additional optical pumping injection into the ground-state ensemble on the ultrafast gain and the phase recovery dynamics of electrically-driven quantum-dot semiconductor optical amplifiers is numerically investigated by solving 1088 coupled rate equations. The ultrafast gain and the phase recovery responses are calculated with respect to the additional optical pumping power. Increasing the additional optical pumping power can significantly accelerate the ultrafast phase recovery, which cannot be done by increasing the injection current density.