Low threshold 1.3-μm InGaAsP/InP lasers prepared by a single-step liquid-phase epitaxy

Abstract
A novel approach to form low threshold laser structures, similar to existing mass-transported lasers but without the second regrowth step, is described. The laser has comparable performance in threshold current and quantum efficiency to more conventional buried heterostructure lasers made with a two-step process. Because of the simplicity in fabrication and its reduced parasitic capacitance it has the potential to be low cost and to have high modulation bandwidth.