Optical fiber preform producing method, optical fiber preform, and optical fiber
US6987917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Jul 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02261
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An object of the present invention is to provide a method for manufacturing an optical fiber preform having a great diameter by reducing an eccentricity or a non-circularity of a core, an optical fiber preform having an small non-circularity and a complex refractive index profile, even with a great diameter, and an optical fiber that is applicable as a dispersion compensating fiber. The present invention involves a rod-in collapse process in which a glass rod is fixed within a glass pipe (or a dummy pipe attached to an end portion) via an aligning jig. The fixation via the aligning jig is made at one end or both ends, the aligning jig has a cylindrical shape with or without one or more reduced diameter portions. When fixed at one end, a heating and integrating process is preferably made from an opposite end. Employing the glass rod and the glass pipe having a refractive index distribution, a complex profile can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.