Model calculations 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 semianalytical model, applicable to both static and flowing-gas devices. The model takes into account 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 of the pump absorption, slope efficiency and lasing power. Effects of natural convection in static DPALs are also taken into account. The model is applied to Cs DPALs and the results are in good agreement with measurements in a static [BV Zhdanov, J. Sell and RJ Knize, Electron. Lett. 44, 582 (2008)] and 1-kW flowing-gas [AV Bogachev et al., Quantum Electron. 42, 95 (2012)] DPALs. It predicts the dependence of power on the flow velocity in flowing-gas DPALs and on the buffer gas composition. The maximum values of …

publication date

  • October 15, 2013