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3 Valeurs des coefficients non linéaires (n 2 et ) mesurés par Z-scan correspondant aux matériaux de références étudiés pour différentes longueurs d'onde ,
CARY500) montrent une absorption linéaire négligeable dans l'infrarouge pour toutes les compositions et plus particulièrement à 1064 nm. La bande d'énergie interdite ( g ) a été déterminée à partir des spectres d'absorption comme étant la longueur d'onde pour laquelle le coefficient d'absorption linéaire est égal à 10 cm -1 . Les indices de réfraction linéaire ont été mesurés à deux longueurs d'onde, 1331 nm et 1551 nm, en utilisant un laser polarisé avec une incidence TE dans un système Metricon, Les compositions ainsi que les coefficients linéaires et non linéaires de verres étudiés sont résumées dans le tableau 4 ,
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