Optical fiber, method of making the same, and optical transmission system including the same
US6567597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jul 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/278
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides an optical fiber and the like comprising a structure making it possible to realize optical communications with a higher speed and a larger capacity as compared with conventional optical transmission systems. The optical fiber according to the present invention is an optical fiber in which at least one first portion having a positive chromatic dispersion at a predetermined wavelength within a wavelength band in use and at least one second portion having a negative chromatic dispersion at the predetermined wavelength are arranged adjacent each other along the longitudinal direction thereof. In particular, the optical fiber comprises a polarization coupling structure for inducing coupling between polarization modes of propagating light. This polarization coupling structure randomly causes coupling between polarization modes of the propagating light, whereby polarization mode dispersion decreases at the predetermined wavelength. As a consequence, transmission characteristics are effectively restrained from deteriorating due to polarization mode dispersion. Specifically, the polarization coupling structure is a twist applied to the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.