Optical fiber
US11048039B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2019 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Feb 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03627
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber includes: a core; a depressed layer surrounding the core; and a cladding surrounding the depressed layer. A refractive index profile of the core is an α-th power distribution having an index α of 1.0 or more and 2.9 or less. A relative refractive index difference Δ− of the depressed layer with respect to the cladding has an absolute value |Δ−| that is 0.05% or more and 0.15% or less. A ratio r1/r2 of a radius r1 of the core to an outer radius r2 of the depressed layer is 0.35 or more and 0.60 or less. A cable cutoff wavelength λcc of 22 m is less than 1.26 μm. A mode field diameter at a wavelength of 1.31 inn is larger than 8.6 inn and smaller than 9.5 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.