Method for producing optical fiber preform
US4259101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Mar 2, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01406
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing an optical fiber preform comprising the steps of blowing, through at least one nozzle, gaseous material producing glass material soot by a CVD reaction to permit the glass material soot to be deposited on a target to produce a soot rod which grows in size, and heating and rendering transparent the soot rod produced in the first step, wherein a pipe is arranged substantially concentrically with the glass material soot so as to permit gas to flow through a clearance between the deposited glass material soot and the inner wall surface of the pipe in a direction in which the soot rod grows in size. The method makes it possible to prevent the outer peripheral portion of the soot rod from becoming porous and to satisfactorily control the diameter of the soot rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.