Fiber preform method with a hot drill-in step for a Ge-doped tube and an F-doped rod
US6474108B2 · kind B2 · utility
3Cited by
13References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0283
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tube-shaped, GeO2-doped silica glass pipe having a high refractive index is prepared (step S2), a cylindrical silica glass rod doped with F element is inserted inside the GeO2-doped silica glass pipe (step S3), and the GeO2-doped silica glass pipe and silica glass rod in thus inserted state are heated so as to be unified (step S4). Further, thus formed assembly is inserted inside the a pure silica glass pipe (step S5), and they are heated so as to be unified (step S6), whereby an optical fiber preform is manufactured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.