2. Main components of a laser source
The amplification expected with the above-mentioned sources is possible by playing on the electronic population variations of the energy levels that characterize the atoms involved between the fundamental level and the excited levels after the action of optical pumping, a concept introduced in 1951 by Alfred Kastler, then a professor at the Paris Faculty of Science.
A priori knowledge of the energy level diagrams of the active ions encountered in the three states of matter is required: He-Ne, Ar, Kr, CO 2 , CO, excimers in gases, organic dye in liquids and rare-earth ions or luminescent transition ions in solids. The key to successful operation is to reverse the electronic populations between the emitting energy level and the final level of the optical transition. The aim is to...
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Main components of a laser source
Absorption and emission transitions of active centers
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Bibliography
- (1) - Les Lasers et Leurs Applications Scientifiques et Médicales - Édition C. Fabre et J. P. Pocholle, Les Éditions de Physique (Paris) (1996). 1.1 C. FABRE, Les Lasers – Principes Fondamentaux, pp. 1-40. 1.2 G. BOULON, Matériaux pour Lasers à Solide, pp. 259-286. 1.3. H. MONERIE, Fibres optiques dopées et applications,...
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