1 mW CW RT 1.55 /spl mu/m tunnel VCSEL: thermal and electrical characteristics of GaAs/AlAs metamorphic mirrors

Summary form only given. Recently, high power monolithic VCSELs (1 mW at 1.55 um) have been demonstrated by using tunnel junction injection and a metamorphic AlAs/GaAs mirror. This approach combined with a planar process based on proton implantation might enable the ultra low cost fabrication of 1.55 /spl mu/m laser sources. In the paper we present the optimization of the electrical conductivity of AlAs/GaAs n type metamorphic mirrors and analyze their thermal properties.