Transverse eigenmode dynamics in multimode CO2 lasers

Eric Louvergneaux; Daniel Hennequin; Didier Dangoisse; Pierre Glorieux

doi:10.1117/12.179642

6 July 1994 Transverse eigenmode dynamics in multimode CO₂ lasers

Eric Louvergneaux, Daniel Hennequin, Didier Dangoisse, Pierre Glorieux

Proceedings Volume 2099, Nonlinear Dynamics in Lasers and Optical Systems; (1994) https://doi.org/10.1117/12.179642
Event: Volga Laser Tour '93, 1993, Moscow, Russian Federation

Abstract

The transverse dynamics of a highly multimode CO₂ laser is studied. The spatial distribution of the intensity is shown to remain ordered even at high Fresnel numbers. Parameters as the effective cavity symmetry or the gain bandwidth are shown to be very important and alter significantly the oscillating pattern. The interpretation of this behavior is helped by adding a saturable absorber inside the cavity of the laser. The effect of the absorber is to stabilize the modes of the empty cavity, which are so demonstrated to be relevant for the description of the transverse dynamics. Following this approach, the dynamics of the laser without absorber is shown to result from the competition of a small number of the empty cavity eigenmodes.

Citation Download Citation

Eric Louvergneaux, Daniel Hennequin, Didier Dangoisse, and Pierre Glorieux "Transverse eigenmode dynamics in multimode CO₂ lasers", Proc. SPIE 2099, Nonlinear Dynamics in Lasers and Optical Systems, (6 July 1994); https://doi.org/10.1117/12.179642

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