Simulation study on thermal analysis of laser gain medium under resonant pumping mechanism

A simulation study on thermal analysis of laser gain medium was reported for resonant pump lasers. On the basis of analyzing the main sources of heat in the gain medium and the essence of reducing quantum losses through resonant pumping mechanism, this study considers the thermal conduction model of laser gain medium and proposes a simulation method for the internal thermal distribution of laser gain medium under resonant pumping mechanism, and compares it with traditional pumping mechanism. The simulation results show that using resonant pumping mechanism and appropriately increasing the pump spot can effectively reduce the thermal effect of the laser, which plays an important role in improving the conversion efficiency and beam quality of the laser. This simulation study is applicable to quasi continuous, Q-switched lasers pumped by semiconductor laser end faces.