Core glass in the alkali-zinc-silicate glass system for an fiber-optic light guide and fiber-optic light guide made with said core glass

Core glass in the alkali-zinc-silicate glass system for an fiber-optic light guide and fiber-optic light guide made with said core glass

22322222222222A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO; 18.5-30, ZnO; 8-20, Σ alkali metal oxides; 0.5-3, LaO; 2-5, ZrO; 0.02-5, HfO; 2.02-5,...

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Bibliographische Detailangaben
Hauptverfasser: Kolberg, Uwe, Curdt, Axel, Gierke, Monika, Winkler-Trudewig, Magdalena, Kron, Guenther, Ehrt, Doris
Format: Patent
Sprache:eng
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Zusammenfassung:22322222222222A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO; 18.5-30, ZnO; 8-20, Σ alkali metal oxides; 0.5-3, LaO; 2-5, ZrO; 0.02-5, HfO; 2.02-5, Σ ZrO+HfO; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, Σ alkaline earth metal oxides; 0.5-3, LiO, but no more LiO than 25% of the Σ alkali metal oxides; >58.5, Σ SiO+ZrO+HfO. A molar ratio of NaO/KO is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.