Photonic band-gap fiber
US8031999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Sep 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03644
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photonic band-gap fiber comprises a first core having a refractive index that is not higher than a refractive index of a clad; a second core that is disposed so as to surround the first core and has a refractive index that is lower than the refractive index of the first core; a clad that surrounds the second core; and a periodic structure portion that is disposed in the clad in a vicinity of the second core and is constituted by high-refractive index portions that have a refractive index higher than that of clad and form the periodic structure, and the periodic-structure portion functions as a wave-length filter. By the function of the periodic structure portion as a wave-length filter, it is possible to reduce the propagation loss of the transmission wavelength and increase the propagation loss of the cutoff wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.