Method for producing glass preform for optical fiber
US4978378A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Jun 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/90
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A glass preform for use in the fabrication of an optical fiber having little bubbles is produced by a method comprising depositing glass soot on a periphery of a starting glass rod to form a porous glass preform, heating and sintering the porous glass preform in a helium atmosphere to consolidate the porous glass preform and then heating the sintered glass in an atmosphere containing an inert gas except helium having partial pressure of the inert gas of not lower than 0.8 atm. to obtain a transparent glass preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.