EFFECT OF BARRIER HEIGHT ON THE UNEVEN CARRIER DISTRIBUTION IN ASYMMETRIC MULTIPLE-QUANTUM-WELL INGAASP LASERS

Four asymmetric multiple-quantum-well (AMQW) laser structures have bee n grown and tested. The structures demonstrate that carriers are not e venly distributed across the active region of a MQW laser. Wells at th e p-side of the active region are preferentially pumped indicating the re are more carriers at the p-side of the active region than at the n- side, The structures also demonstrate that decreasing the height of th e barriers reduces this effect and results in a more even carrier dist ribution. Thus, well position and barrier height are shown to be impor tant design parameters for AMQW and conventional MQW lasers.