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.
(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 heat capacity and a large relaxation rate constant between the
© 2013 Optical Society of America
(140.1340) Lasers and laser optics : Atomic gas lasers
(140.3430) Lasers and laser optics : Laser theory
(140.3460) Lasers and laser optics : Lasers
(140.6810) Lasers and laser optics : Thermal effects
Lasers and Laser Optics
Original Manuscript: January 7, 2013
Manuscript Accepted: February 28, 2013
Published: April 4, 2013
Boris D. Barmashenko and Salman Rosenwaks, "Detailed analysis of kinetic and fluid dynamic processes in diode-pumped alkali lasers," J. Opt. Soc. Am. B 30, 1118-1126 (2013)