Strained-quantum-well InGaAs-GaAs-AlGaAs lasers and laser arrays with
record low threshold currents of 0.6 mA for cleaved devices and 0.145
mA for high-reflectivity facet-coated devices are fabricated by single
-step growth on nonplanar substrates by metalorganic chemical vapor de
position. These laser arrays have high quantum efficiency, low interna
l loss, and high uniformity because of the one-step growth and simplif
ied processing procedures.