Optically pumped type-II W lasers emitting in the 5.4-7.1-mu m wavelength r
ange and at continuous-wave (CW) temperatures up to 210 K are demonstrated.
At 80 K, the maximum CW output power from a 40-mu m-wide pump stripe is 48
mW at 5.41 mu m and 31 mW at 6.05 mu m. Epitaxial-side-down heat sinking i
s provided by a new diamond-pressure-bond mounting technique, which require
s minimal processing and maintains topside optical access.