Positive dispersion optical fiber having large effective area
US6483975B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03644
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of the invention include an optical communications system including one or more optical transmission devices, one or more optical receiving devices, and at least one positive dispersion optical fiber coupled therebetween. The fiber includes a doped core region with an index of refraction n1, a cladding region with an index of refraction n2, and first and second annular rings or regions therebetween with indices of refraction n3 and n4, respectively. The various regions are manufactured in such a way that the refractive index value ranges are: 0.14<(n1−n2)/n2<0.31, −0.19<(n3−n2)/n2<−0.02, and −0.20<(n4−n2)/n2<−0.08. The fibers exhibit a chromatic dispersion greater than 20±2.0 ps/(nm-km) and a dispersion slope less than 0.062 ps/(nm2-km) at a wavelength of 1550 nm. Also, the fibers have a relatively large effective core area, Aeff, e.g., greater than 100.0 &mgr;m2, and a relative dispersion slope (RDS) less than 0.0032 nm−1. The mode field diameter (MFD) is at least 11.9±0.7 &mgr;m. These desirable transmission characteristics are achieved without many of the manufacturing and economic limitations of conventio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.