Low-consumption (below 2W) continuous-wave singlemode quantum-cascade lasers grown by metal-organic vapour-phase epitaxy

Continuous-wave operating singlemode quantum-cascade lasers with a threshold current of 75 mA and total power consumption of less than 2 W are presented. The lasers are grown by metal-organic vapour-phase epitaxy; they function up to temperatures higher than 50 degrees C and the emission wavelength is 5.25 mu m.