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Proceedings Paper

Transverse eigenmode dynamics in multimode CO2 lasers
Author(s): Eric Louvergneaux; Daniel Hennequin; Didier Dangoisse; Pierre Glorieux
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Paper 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.

Paper Details

Date Published: 6 July 1994
PDF: 8 pages
Proc. SPIE 2099, Nonlinear Dynamics in Lasers and Optical Systems, (6 July 1994); doi: 10.1117/12.179642
Show Author Affiliations
Eric Louvergneaux, Univ. des Science et Technologies de Lille (France)
Daniel Hennequin, Univ. des Science et Technologies de Lille (France)
Didier Dangoisse, Univ. des Science et Technologies de Lille (France)
Pierre Glorieux, Univ. des Science et Technologies de Lille (France)


Published in SPIE Proceedings Vol. 2099:
Nonlinear Dynamics in Lasers and Optical Systems
Neal Broadus Abraham; Leonid A. Melnikov; Anatoly N. Oraevsky; Yakov I. Khanin, Editor(s)

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