Method for producing glass preform for optical fiber
US4737179A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Aug 4, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0286
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a glass preform for use in fabrication of an optical fiber, which comprises steps of forming a cylindrical rod of glass having a refractive index distribution with axial symmetry around the rod axis by an VAD method, stretching the rod glass to decrease its diameter, inserting the stretched rod in a glass tube having a refractive index distribution with axial symmetry around the tube axis and heating and melting a complex of the stretched rod and the tube to integrate them from the glass preform produced by the method, an optical fiber having precisely controlled refractive index distribution can be fabricated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.