Polarization-maintaining optical fiber, method of manufacturing polarization-maintaining optical-fiber connecting portion, and polarization-maintaining optical-fiber connecting portion
US7809223B2 · kind B2 · utility
223Cited by
7References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Jul 8, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/30
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polarization-maintaining optical fiber includes a core region and a cladding region formed around the core region. The cladding region has a refractive index lower than a refractive index of the core region. A refractive index profile of the core region is either one of a step shaped or a concave shaped. The cladding region includes two holes formed in such a manner that a shortest distance from the core region is virtually zero at locations in opposite to each other across the core region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.