Cladding glass for optical fiber
US4768859A · kind A · utility
26Cited by
10References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 22, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Oct 22, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C13/046
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cladding glass for optical fiber comprises 60 to 80% by weight of silicon dioxide (SiO.sub.2), 0.5 to 10% by weight of aluminum oxide (Al.sub.2 O.sub.3), 9 to 17% by weight of an alkali metal oxide, 3 to 15% by weight of boron oxide (B.sub.2 O.sub.3) and more than 0 but not more than 3% by weight of fluorine (F). The cladding glass of this invention can simultaneously satisfy low refractive index and lowered viscosity, and is also excellent in water resistance and weathering resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.