Optically pumped laser action at 77 K in GaAs/GaInP double heterostructures grown by molecular beam epitaxy

Abstract
Cw laser action has been achieved at 77 K in double heterostructures of GaAs/Ga0.47In0.53P grown by molecular beam epitaxy using the dimers P2 and As2. The 6471‐Å line of a krypton laser was used to optically pump 100‐μm‐wide bars of the p isotype structure having an active region thickness of 0.25 μm. Laser action was initiated, as witnessed by the appearance of Fabry Perot modes in the emission and the occurence of a sharp knee in the emitted‐power–pump‐power characteristic, at an absorbed power density of 103 W/cm2.