Process for the production of an optical waveguide preform
US5215564A · kind A · utility
8Cited by
5References
8Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 19, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Dec 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01282
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the process for the production of an optical waveguide preform, in which the cladding layer is applied as a tubular powder layer onto a cylindrical glass core rod and is densified by heating, the powder layer has a relative density of approximately 6 percent, which is increased to 25-50 percent during the stabilization process. In order for this process to proceed without damage to the preform, the powder layer is initially heated at a low heating rate. From approximately 150.degree. C., the heating rate is increased until a higher temperature is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.