Method for drying and sintering an optical fiber preform
US5656057A · kind A · utility
13Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | May 19, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01446
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method of drying and sintering porous optical fiber preforms, especially those consisting of a solid glass core cane surrounded by a layer of cladding soot. After it is dried in a dehydrating atmosphere, the porous preform is heated to a presinter temperature just below that at which it would begin to rapidly densify. The various temperature holds and ramp rates are such that the preform is consolidated in a relatively short time without becoming cloudy or exhibiting other defects that would adversely affect the optical fiber drawn from the consolidated draw blank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.