Single-mode optical fiber with ultra low attenuation and large effective area
US10209437B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2018 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Jan 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02266
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber with ultra-low attenuation and large effective-area includes a core layer and cladding layers. The cladding layers have an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The core layer has a radius of 4.8-6.5 μm, and a relative refractive index difference of −0.06% to 0.10%. The inner cladding layer has a radius of 9-15 μm, and a relative refractive index difference of about −0.40% to −0.15%. The trench cladding layer has a radius of about 12-17 μm, and a relative refractive index difference of about −0.8% to −0.3%. The auxiliary outer cladding layer has a radius of about 37-50 μm, and a relative refractive index difference of about −0.6% to −0.25%. The outer cladding layer is a pure silicon-dioxide glass layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.