Abstract: A novel multiple-active-region tunneling regenerated strained-quantum-well vertical-cavity surface-emitting laser(VCSEL),whose differential quantum efficiency is larger than unity and whose performance is expected to be improved,especially the threshold current is expected to be reduced and the output power is expected to be increased,was designed.Then the output power,threshold current of the novel structure and those of the traditional structure were compared under the conditions of the same reflectivity and injected current.So the advantages of the novel structure have been proved in theory.