High-temperature 4.5-mu m type-II quantum-well laser with Auger suppression

Laser emission at 4.2-4.5 mu m has been observed at temperatures up to 310 K in pulsed optical pumping experiments on type-II quantum-well (QW) lasers with four constituents in each period (InAs-Ga1-xInxSb-InAs-AlSb). The characteristic temperature, T-0, is 41 K, and a peak output power exceeding 2 W/facet is observed at 200 K, The power conversion efficiency per facet of approximate to 0.2% up to 200 K is within a factor of 2 of the theoretical value, The 300 K Auger coefficient of 4 x 10(-27) cm(6)/s extracted from the threshold pump intensity demonstrates that Auger losses have been suppressed by a factor of four.