Analysis of the operating point of a novel multiple-active-region tunneling-regenerated vertical-cavity surface-emitting laser

A novel multiple-active-region tunneling-regenerated vertical-cavity surface-emitting laser (VCSEL) with a greater-than-unity differential quantum efficiency is proposed. This novel VCSEL is expected to have an improved performance, specifically, reduced threshold current and heightened output power. The optimum reflectivity in terms of output power is determined for this novel VCSELs with fixed supply current and series resistance as a parameter. We compare the output power of the novel structure with that of the traditional structure at the same reflectivity and injected current. Also, we compare the threshold current of the novel structure with that of the traditional structure at the same reflectivity and output power. Finally, we prove the advantage of the novel structure in theory.