Monomode optical fibre
US6574408B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Sep 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4478
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A monomode optical fiber provided for transporting light having a wavelength &lgr; comprised between 480 and 550 nm. The fiber comprises a core made of a first transparent dielectric material, having a first refractive index nc and a substantially circular cross-section with a radius dimension a. The fiber further comprises a first cladding coaxially applied on said core and made of a second transparent dielectric material having a second refractive index nm1, wherein nm1<nc, The first transparent dielectric material consists in substantially pure silica, the second transparent dielectric material consists in doped silica, the thickness of the first cladding is comprised in a range of 5 to 15 &mgr;m, the values of nc and nm1 are chosen in such a manner that the numerical aperture (NA={square root over (nc2−n2m1)}) is less than 0.1 and the said radius dimension a is above 2 &mgr;m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.