Variable optical fiber grating and dispersion compensator
US6928203B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2003 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Jan 27, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29398
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A variable optical fiber grating is provided which is compact, and in which an amount of chromatic dispersion can be effectively varied without changing an operating center wavelength. Also provided is a dispersion compensator, which uses this variable optical fiber grating. The fixing member is formed by providing an outer cylinder 2 comprising a material with a lower coefficient of linear expansion around an inner cylinder 1 comprising a material with a higher coefficient of linear expansion, and an optical fiber grating is fixed in a groove 3 formed on the inner cylinder 1. By adjusting the fixing position of the optical fiber grating, an expansion coefficient and contraction coefficient of the optical fiber grating which follows the expansion and contraction of the material with the higher coefficient of linear expansion, differ along the longitudinal direction of the optical fiber grating, so that an amount of chromatic dispersion is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.