Modeling of Energy-Transfer Upconversion and Thermal Effects in End-Pumped Quasi-Three-Level Lasers
Applied Optics, Vol. 43, Issue 24, pp. 4753-4767 (2004)
http://dx.doi.org/10.1364/AO.43.004753
Acrobat PDF (336 KB)
Abstract
An analytical model of cw quasi-three-level lasers that includes the influence of energy-transfer upconversion (ETU) has been developed. The results of the general output modeling were applied to a laser with Gaussian beams, and rigorous numerical calculations have been made to study the influence of ETU on threshold, output power, spatial distribution of population-inversion density, and fractional thermal loading. The model was applied to a laser operating at 946 nm in Nd:YAG, where the dependence of laser-beam size on laser performance was investigated in particular. A simple model for the degradation of laser-beam quality from a transversally varying saturated gain is proposed that is in good agreement with measurements of the laser in a plane-plane cavity.
© 2004 Optical Society of America
OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.6810) Lasers and laser optics : Thermal effects
Citation
Stefan Bjurshagen and Ralf Koch, "Modeling of Energy-Transfer Upconversion and Thermal Effects in End-Pumped Quasi-Three-Level Lasers," Appl. Opt. 43, 4753-4767 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-24-4753
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