Pseudo-nonlinear and athermal lensing effects on transverse properties of Cr(3+) based solid-state lasers

Several experiments (time-resolved Z-scan experiments based on pulsed and CW pump lasers, time-resolved divergence diagnostics) have been performed to examine and clarify the question of the converging or diverging population lensing effect occurring in a Cr(3+):Al(2)O(3) ruby laser. The dynamics of the laser far-field divergence of such a laser indeed indicated initially a diverging effect while Z-scan measurements conclude to a converging one. The origin of this discrepancy is thus analysed and elucidated here by introducing the general concept of correlation collapse between the centre and the wings of a laser beam having some clipping. (C) 2010 Elsevier B.V. All rights reserved.

Fond National de la Recherche (Algeria)

Fond National de la Recherche (Algeria)

Comité Français d´Evaluation de la Coopération Universitaire avec le Brésil (COFECUB)

French Agency Comite Francais d`Evaluation de la Cooperation Universitaire et Scientifique avec le Bresil (COFECUB)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Brazilian Agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)