OPTIMIZING AND ENGINEERING EUSE-PBSE0.78TE0.22-EUSE MULTIPLE-QUANTUM-WELL LASER STRUCTURES

In this paper, we present a simulation model to optimize and engineer EuSe-PbSe0.78Te0.22-EuSe single-quantum-well lasers. We solve for the effects of strong nonparabolicity of the bands on the optimization pro cess. The optical energy confined in the active region is also calcula ted for multiple-quantum-well (MQW) lasers, The modal gain-current den sity relation for this structure is obtained for parabolic band and no nparabolic band systems. The relationships between threshold current, cavity length, and mirror reflectivity are obtained for the MQW struct ure assuming parabolic and nonparabolic band systems. Finally,, in add ition to a 20% shift in the output lasing energy, it is concluded that the effects of nonparabolicity on the threshold current values are si gnificant for short-cavity lasers and decrease with an increase in the cavity length.