Detailed analysis of kinetic and fluid dynamic processes in diode-pumped alkali lasers Academic Article uri icon

abstract

  • Kinetic and fluid dynamic processes in diode-pumped alkali lasers (DPALs) are analyzed in detail using a simple, semi-analytical model, applicable to both static and flowing-gas devices. Unlike other models, it takes into account the effects of temperature rise, excitation of neutral alkali atoms to high lying electronic states and their losses due to ionization and chemical reactions, resulting in a decrease in pump absorption, slope efficiency, and lasing power. Effects of natural convection in static DPALs are also taken into account. The applicability of the model is demonstrated in Cs DPALs by (1) obtaining good agreement with measurements in static [Electron. Lett. 44, 582 (2008)] and flowing-gas [Quantum Electron. 42, 95 (2012)] DPALs,(2) predicting the dependence of power on the flow velocity in flowing-gas DPALs, and (3) checking the effect of using a buffer gas with high molar …

publication date

  • May 1, 2013

published in