Method of manufacturing a monomode fluoride optical fiber, and an optical amplifier using such a fiber
US6626011B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1998 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2205/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a monomode optical fiber and a monomode preform (2) having a mother preform (22) housed in an outer sleeve tube (20). It is characterized in that it also includes an intermediate tube (21) between the mother preform (22) and the outer tube (20), the intermediate tube (21) possessing viscosity at fiber-drawing temperature which is less than the viscosity(ies) at fiber-drawing temperature of the mother preform (22) and of the outer tube (20). The invention also provides a method of manufacturing a monomode optical fiber. The fiber has a core that is better centered and less deformed than in the prior art. An application of the invention lies in making an optical amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.