Optical fiber and method of manufacturing optical fiber preform
US8925355B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/131
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing an optical fiber preform that includes preparing a glass cylinder with inner and outer surfaces forming at least part of a cladding portion are repeatedly polished, and a glass core rod that includes a core portion having a higher refractive index than the cladding portion; and inserting the core rod into the glass cylinder and heating the glass cylinder and core rod to form a single body. The repeated polishing of the inner surface of the glass cylinder includes passing pure water that does not contain a cutting fluid over the inner surface for at least the final polishing. The polishing is preferably performed using a polishing cloth to which are affixed diamond abrasive grains. The glass core rod and the glass cylinder are preferably formed of composite quartz glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.