Long wavelength, low-loss optical waveguide
US4385802A · kind A · utility
47Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber waveguide of the type comprising an outer cladding layer, an axially disposed core of SiO.sub.2 doped with GeO.sub.2 and a first inner cladding layer of SiO.sub.2 doped with an oxide such as P.sub.2 O.sub.5 for lowering the preform processing temperature. A second inner cladding layer of pure SiO.sub.2 is disposed between the first inner cladding layer and the core to prevent P.sub.2 O.sub.5 from diffusing into the core, thereby eliminating absorption losses from the P--O--H band in the 1.1-1.8 .mu.m region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.