Process for producing a glass preform for optical fiber
US4338111A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 19, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Dec 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/90
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a preform for glass fiber for optical transmission by heating supply gases to form fine particles that are deposited on a rotating starter member to form an aggregate of fine glass particles which are then sintered to give a transparent vitreous material, characterized by a first heating stage wherein the aggregate of fine glass particles is sintered by increasing the temperature at a constant rate in a gaseous atmosphere which contains a halogen or halide and which has dehydrating activity, followed by holding the aggregate for a given period of time at a temperature in the range that causes considerable shrinkage of the aggregate, and a second heating stage where said aggregate is heated to the vitrifying temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.