Modeling of Kinetic and Thermodynamic Processes in a Flowing Exciplex Pumped Alkali Vapor Laser

Abstract

On the basis of analysis of kinetic and thermodynamic processes of extremely high power CW exciplex pumped alkali vapor laser (XPAL), we establish a physical model to calculate and analyze 2-D and 3-D distributions of temperature as well as the intensity of laser beam in cavity with a different flowing velocity in the cell. Comparison between the simulated results of temperature distribution and laser characters of single-end and double-end scheme is drawn, demonstrating the advantages of double-end flow scheme, which actually means more homogeneous distributions of temperature and alkali atoms resulting in higher optical–optical efficiency. Enhancing pressure of argon to ~10 atm, with optimized pumped intensity of ${2.54\times 10}^{5}$ W/cm2 and optimized cavity length of 80 cm, we obtain more detailed simulated results of broadband pumped XPAL with four or five-level system.