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.. La-courbe-exprimée-en-db-starks, m ?1 montre un exemple de réponses spectroscopiques associées à des émissions ou absorptions de photons Les schémas 1 et 2 et 3 décrivent successivement la contribution des différents effets à la forme du spectre d'émission. Respectivement, l'élargissement homogène, l'élargissement inhomogène et les transitions entre sous-niveaux

. Schéma-de-l-'échantillon-de-fibre, . Du-coeur-de-la-fibre, and M. Et-de-la-zone-analysée-par-la-tomographie, Le coeur est creusé par découpe FIB et laisse apparaitre une forme de ponton. La surface bleutée correspond à la surface analysée en MEB pour la mise en évidence des particules. La hauteur de l'image coïncide avec l'axe de l'étirage. Le faisceau d'électrons fait un angle de 52 ? avec la surface analysée, p.50

.. Schéma-du-cône-d, étirage et des variables utilisées pour l'expression des profils de viscosité et champs de vitesse (à gauche) Photographie d'un cône d'étirage d'une préforme (à droite), p.82

.. Données-obtenues-sur-le-fibrage-en-Échelle-semi-logarithmique, Évolution mesurée du diamètre de fibrage en vert en fonction de la position Les courbes rouge et bleue correspondent à la viscosité et au taux de déformation calculés à partir du diamètre et des équations IV.7 et IV.8. Le temps qu'il reste avant d'atteindre la position finale est exprimé en magenta à partir de la conservation du débit, p.85