High quality buried heterostructure (BH) lasers were grown by a two‐step metalorganic chemical vapor deposition. Single stripe BH lasers exhibited thresholds of 20 mA for a 1.2‐&mgr;m stripe. The spectral output emits in a single transverse and longitudinal mode up to 15 mW, with a side lobe suppression greater than 23 dB at 5 mW output. BH laser arrays were fabricated with threshold currents of 130 mA and differential efficiencies of 70% for a 10‐stripe array.