Affiliation:
1. Institut de Chimie de la Matière Condensée de Bordeaux Université de Bordeaux Pessac France
2. Conditions Extrêmes et Matériaux: Haute Température et Irradiation UPR 3079 Université d'Orléans Orléans France
3. Centre d'optique photonique et laser Pavillon d'optique et photonique Université Laval Québec Québec Canada
4. Institut des Sciences Moléculaires UMR 5255 Université́ de Bordeaux Talence France
Abstract
AbstractGallium‐rich heavy metal oxide glasses have become highly attractive optical materials since they exhibit a wide transparency window spanning from the ultraviolet ∼270 nm up to the mid‐infrared (IR) region ∼6 μm making them promising for a future integration in optical fiber devices. Nonetheless, in most composition, surface crystallization is a key limiting factor for optical fiber drawing using the classical preform‐to‐fiber method. Herein, taking advantage of structural information from vibrational spectroscopies (Raman/IR) and 71Ga Solid‐State Nuclear Magnetic Resonance, we describe the key role of lanthanum and yttrium rare—earth elements on the glass structure and their impact on the capability to draw those new glass compositions into optical fibers. This approach emphasizes that yttrium ions as compared with lanthanum ones favor the glass disorder, increasing significantly the fraction of GaO5 units with respect to GaO4. That, combined with thermal analysis and examination of the crystallization behaviors, highlights that Y2O3 prevents the glass devitrification during the glass shaping. The smaller yttrium radius is believed to be the key physical parameter preventing the precipitation of the BayGa5‐yGey+1La3‐yO14 (y = 0, 1, 2, 3) langasite‐type crystal phase. This study remains particularly relevant and opens up the way for the development of highly robust power scaled fiber devices operating from the visible up to the challenging mid‐IR domain.
Funder
Agence Nationale de la Recherche
Subject
Materials Chemistry,Ceramics and Composites
Cited by
1 articles.
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