Method for producing glass preform for optical fiber
US5314518A · kind A · utility
34Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Jun 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/901
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass preform for an optical fiber containing a dopant in a core portion at a high concentration is produced by providing a glass tube, forming a coating film of a sol-gel solution containing a dopant compound on an inner wall of the glass tube, vitrifying and collapsing the glass tube having the coating of the sol-gel solution to obtain a glass rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.