Method of fabricating optical fiber preforms
US4915717A · kind A · utility
14Cited by
5References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 6, 1984 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2207/50
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved method for fabricating an optical fiber preform by the vapor phase axial deposition (VAD) method, comprises forming core and cladding soots at the same time by the use of core and cladding burners. The improvement is that the cladding burner is designed so that at least one of the outlets for a feed material gas, a fuel gas, an auxiliary fuel gas, and an inert gas is composed of a plurality of openings. In this improved method, the temperature distribution from the boundary of the core soot to the periphery of the cladding soot is made smooth, and thus the cladding soot is prevented from cracking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.