Optical fiber and method of manufacturing the same
US10422948B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 2018 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Jan 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0281
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber includes a core, a depressed layer surrounding the core, and a cladding surrounding the depressed layer, where a refractive index profile of the core is an α power distribution in which an index α is 3 or more and 6 or less, a relative refractive index difference Δ− of the depressed layer with respect to the adding is set such that an absolute value |Δ−| thereof is 0.01% or more and 0.05% or less, a radius r1 of the core and an outer circumference radius r2 of the depressed layer are set such that a ratio r1/r2 thereof is 0.2 or more and 0.5 or less, a cable cutoff wavelength λcc of 22 m is 1260 nm or less, and a mode field diameter MFD 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.