Noise-driven rate equation analysis of quantum-well, microcavity lasers

Noise-driven rate equations are used in modeling microcavity, quantum-well, semiconductor lasers. Results for different cavity designs are compared. Particular attention is paid to threshold and noise characteristics. Using attainable dimensions it is seen that threshold current is reduced, relaxation modulation bandwidth is increased and turn-on delay is shortened as previously predicted for devices with enhanced spontaneous emission. In addition, it is shown that the device tends to lose its coherence as the microcavity design is approached, and the microcavity loses its noise advantage as the bandwidth is increased (when external modulation is considered) because of the lack of roll-off in the 100 GHz spectrum presented.<>