Apparatus and method for manufacturing optical fiber preform by MCVD
US6408653B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B37/01876
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and a method for manufacturing an optical fiber preform by modified chemical vapor deposition (MDVD). The apparatus includes a heating device for heating a rotating substrate tube while moving in a predetermined direction, wherein the heating unit has a first heating unit located at the front with respect to the moving direction, for heating the substrate tube with a relatively low flame pressure, and a second heating unit located at the rear of the first heating means with respect to the moving direction, for heating the substrate tube with a relatively high flame pressure. The first and second heating units are selectively used for deposition and collapsing, such that the duration and temperature of collapsing can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.