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Elaboration et caractérisation de verres et fibres optiques à base d’oxyde de gallium pour la transmission étendue dans l’infrarouge

Abstract : The demand for transparent material in the specific infrared region from 2 to 5 μm is increasing. Several glass compositions present an extended transmission in the infrared, however their complex synthesis process, their poor mechanical or chemical resistance as well as their compounds restricted their shaping and applications. Gallium oxide (Ga2O3) based heavy metal oxide glasses represent excellent candidates if they can be shaped. The work exposed in this thesis focuses on the properties and the local structure study of three gallium oxide rich vitreous systems: GaO3/2-GeO2-NaO1/2, GaO3/2-LaO3/2-KO1/2-NbO3/2 and GaO3/2-GeO2-BaO-KO1/2. For a specific composition in the glass system GaO3/2-GeO2-BaO-KO1/2, mechanical properties, devitrification study as well as fiber drawing by different techniques (preform, powder in tube, rod in tube and from an open crucible) have been investigated.
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https://tel.archives-ouvertes.fr/tel-01968046
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Submitted on : Wednesday, January 2, 2019 - 1:19:25 AM
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Tea Skopak. Elaboration et caractérisation de verres et fibres optiques à base d’oxyde de gallium pour la transmission étendue dans l’infrarouge. Matériaux. Université de Bordeaux; Université Laval (Québec, Canada), 2017. Français. ⟨NNT : 2017BORD0860⟩. ⟨tel-01968046⟩

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