Optical fiber containing alkali metal oxide
US7844155B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2008 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Apr 15, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K2O, Na2O, Li2O, Rb2O, Cs2O and mixtures thereof in an average concentration in said core between about 10 and 10000 ppm by weight, and a silica-based cladding surrounding and directly adjacent the core, the cladding including a region having a lower index of refraction than the remainder of such cladding. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained which exhibits a cable cutoff less than 1400 nm chromatic dispersion at 1550 nm between about 13 and 19 ps/nm/km, and a zero dispersion wavelength less than about 1324 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.