RT pulsed operation of metamorphic VCSEL at 1.55 µm

An all molecular beam epitaxy grown 1.55 µm vertical cavity surface-emitting laser is presented which comprises an InP/InGaAsP bottom mirror, multiple quantum well active layer and a GaAlAs/GaAs metamorphic top mirror directly grown on the InP cavity. This structure takes advantage of the intrinsic optical, electrical and thermal properties of GaAlAs/GaAs material and is compatible with a 2 in process. Such an approach will therefore lead to a drastic reduction in the cost of optical sources and offer the possibility of a massive development of the optical network.