Double-fused 1.52-μm vertical-cavity lasers

Abstract

We demonstrate a novel long-wavelength vertical-cavity laser structure employing two AlAs/GaAs mirrors and a strain-compensated InGaAsP quantum-well active region. The lasers have been fabricated by wafer fusion and have the lowest room-temperature pulsed threshold current density of 3 kA/ cm2 at 1.52 μm. Eight laser sizes ranging from 9 to 60 μm were fabricated with threshold currents as low as 12 mA. Single transverse mode operation was observed on the 9 μm device, while other devices lased multimode. The maximum pulsed output power was 7 mW.© 1995 American Institute of Physics.