Single mode optical fiber with improved bend performance
US7805039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2007 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Methods and apparatus relate to optical fibers suitable for use in sensing applications exposed to radiation environments. The fibers include a core of pure silica or chlorine doped silica surrounded by a fluorinated silica cladding. These glasses for the core and cladding utilize dopants that resist radiation-induced attenuation. A two step process for forming the cladding can achieve necessary concentrations of the fluorine by performing a soot deposition process in a different environment from a consolidation process where the soot is sintered into a glass. Concentration of fluorine doped into the cladding layer enables obtaining a numerical aperture that confines a mono-mode of the fiber to resist bend-induced attenuation. Dimensions of the fiber further facilitate bending ability of the fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.