Transient response of vertical-cavity surface-emitting lasers ofdifferent active-region diameters

摘要

The multimode dynamics of vertical-cavity surface-emitting lasersnwith different active-region diameters was measured under subnanosecondnelectrical excitation (800-ps pulse duration, 100-ps risetime). Thendynamics is characterized by the delayed onset of higher order modesnwhich have a turn-on delay that is dependent on the active-regionndiameter and the excitation parameters. A simple model that can be usednto estimate this turn-on delay for large-area devices is presented.nPolarization-resolved measurements show that, under this fast excitationncondition, both orthogonal polarization states are isomorphic. Theninfluence of the observed dynamics on the relative intensity noise ofnthese devices is also discussed