Large mode field diameter optical fiber
US7046902B2 · kind B2 · utility
3Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | May 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03633
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A large mode field diameter optical fiber is disclosed. It is a single mode optical fiber which has a core and a cladding. The core of this fiber has two regions, an inner core region and an outer core region which has a refractive index lower than that of the inner core region. The inner core region is doped with a rare-earth element, such as Er2O3, and a co-dopant, such as Al2O3, and the outer core region is doped with a dopant such as GeO2. The types and amounts of the dopants and co-dopants are adjusted to obtain a fiber with a mode field diameter greater than 5.5 μm at a wavelength of 1550 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.