Thermal Characteristic Analysis Of Optically Pumped Semiconductor Vertical-External-Cavity Surface-Emitting Lasers Based On ANSYS Simulation

Based on the rate equations of Optically Pumped Semiconductor Vertical-External-Cavity Surface-Emitting Lasers (OPS-VECSEL), the expression of output power was deducted and modified in this paper. The impact of thermal effects on the output power was discussed. According to the thermal effect of OPS-VECSEL, the mechanism of heat generated in the device was analyzed. And the finite element analysis model was built. The expressions of heating power density distribution in deferent devices were given. The distributions of temperature and heat flow were simulated using ANSYS. And the influences of double heat spreaders, DBM and end-pumped structure on device’s thermal characteristics were discussed, especially; the changes of temperature rise in OPS-VECSEL with deferent construction parameters and pumping conditions were also studied. The results showed that both DBM and double heat spreaders had improved the heat dissipation of OPS-VECSEL; while end-pumped VECSEL was worse than front-pumped VECSEL in heat dissipation at the same condition. Both theoretical calculation and simulation results indicated that increasing the pump spot radius appropriately was benefit to reduce the thermal effect of OPS-VECSEL.All above conclusions provide a theoretical basis for designing and optimization of thermal dissipation in OPS-VECSEL, and it has certain significances for improving the thermal performance of the device.