Modeling of flowing gas diode pumped rare gas atoms laser

Abstract

Diode-pumped rare gas lasers (DPRGLs) have the potential for high optical conversion efficiency and excellent beam quality, positioning them as promising candidates for directed energy lasers. This study proposes a semi-analytical model for a flowing gas diode-pumped rare gas laser considering the influence of temperature elevation resulting from increased pump power on the output. Furthermore, we explore the relationship between laser output power density and gas temperature with respect to gas flow velocity. The results of numerical simulation agree well with those of Rawlins et al.’s experiment. The model addresses the existing gap in DPRGL dynamic models by incorporating temperature considerations, emphasizing the crucial role of a gas flow device in achieving high-energy laser. With the best set of parameters, the output power of DPRGL reaches 100 kW/cm2, at pumping power density of 300 kW/cm2 and gas flow velocity of 140 m/s. Parameter optimization is helpful for design of a relatively high-power DPRGL system.