Optical fiber
US9772444B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2017 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Mar 23, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/23
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber including a core and a cladding including an inner cladding layer and an outer cladding layer is provided. The refractive index of the core Δ1, the refractive index of the inner cladding layer Δ2, and the refractive index of the outer cladding layer Δ3 have a relationship denoted by the following expressions: Δ1max>Δ2min and Δ1max>Δ3, and 0.01%<|Δ2min−Δ3|<0.03%. An outer circumference radius r1 of the core, an outer circumferential radius r2 of the inner cladding layer, and an outer circumferential radius r3 of the outer cladding layer have a relationship denoted by the following expressions: r1<r2<r3, and 0.2≦r1/r2≦0.5. A cable cut-off wavelength λcc 1260 nm or less. A mode field diameter at a wavelength of 1310 nm is 8.6 μm or more and 9.5 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.