Resolved‐detrimental surface crystallization in yttrium lanthanum gallate glasses for optical fiber applications
Language
en
Article de revue
This item was published in
Journal of the American Ceramic Society. 2023, vol. 106, n° 10, p. 5754-5765
Wiley
English Abstract
Gallium-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 ...Read more >
Gallium-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.Read less <
English Keywords
Gallate glasses
Local glass structure
Crystallization
Vibrational Infrared and Raman spectroscopies
Solid-State Nuclear Magnetic Resonance
Optical glass fibers
Infra-Red transparent Materials
Heavy Metal Oxide glasses
ANR Project
Fabrication 3D de composants optiques intégrés à bas cout par laser femtoseconde pour des applications IR - ANR-18-CE08-0004
University of Bordeaux Graduate Scholl in Light Sciences & Technologies - ANR-17-EURE-0027
University of Bordeaux Graduate Scholl in Light Sciences & Technologies - ANR-17-EURE-0027
Origin
Hal imported