Channeled-substrate planar structure (AlGa)As injection lasers

Abstract

Undesirable nonlinear ’’kinks’’ in light-output–vs–current characteristics of stripe geometry double-heterostructure (DH) injection lasers are significantly reduced by stabilizing the transverse modes along the junction plane. Built-in passive guiding mechanism is introduced by growing planar (AlGa)As/GaAs DH layers on a grooved GaAs substrate.