Microstructured optical fibres
US6539155B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Dec 8, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Dec 8, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a new class of optical waveguides, in which waveguiding along one or more core regions is obtained through the application of the Photonic Bandgap (PBG) effect. The invention further relates to optimised two-dimensional lattice structures capable of providing complete PBGs, which reflects light incident from air or vacuum. Such structures may be used as cladding structures in optical fibers, where light is confined and thereby guided in a hollow core region. In addition, the present invention relates to designs for ultra low-loss PBG waveguiding structures, which are easy to manufacture. Finally, the present invention relates to a new fabrication technique, which allows easy manufacturing of preforms for photonic crystal fibers with large void filling fractions, as well as it allows a high flexibility in the design of the cladding and core structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.