Thermal behaviour of 1.3 /spl mu/m vertical cavity surface emitting laser

Room temperature, pulsed operation of 1.3 /spl mu/m InGaAsP/InP vertical cavity surface emitting lasers (VCSELs) has been demonstrated. Low threshold currents have been obtained with a non buried structure having dielectric mirrors on both the p and n sides. We discuss the laser results pointing out the importance of thermal properties. The thermal resistance is estimated for p- and n-down mounted lasers.