We report room-temperature CW high output power (1 W) at ~ 7770 Å from OM-VPE-grown ultra-thin single-quantum (~60 Å)-well lasers. The devices are broad-area (250 × 210 μm) lasers with a quantum-well GaAlAs active region doped with Mg, and with applied high reflective and low reflective mirror facets. For an output power of 1 W from the emitting facet, the DC-to-light conversion efficiency is as high as 21%.