25 Gb/s operation of oxide-confined 850-nm VCSELs with ultralow 56 fJ dissipated power per bit

摘要

A new record for energy-efficient oxide-confined 850-nm vertical-cavity surface-emitting lasers (VCSELs) particularly suited for optical interconnects is presented. Error-free performance at 25 Gb/s is achieved with dissipated/total power of only 56/83 fJ/bit. We determine the influence of the oxide-aperture diameter on the energy-efficiency of high-speed VCSELs by comparing devices with different aperture diameters all operating at 25 Gb/s. We show that our present single-mode VCSELs are more energy-efficient than our multimode ones.