Zero dispersion single mode optical fiber with center core and side core in the 1.5 .mu.m wavelength region
US4755022A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Aug 29, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02004
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A 1.5 .mu.m zero dispersion single mode optical fiber comprising a center core, a side core disposed on an outer side of the center core and having a refractive index lower than that of the center core, and a cladding portion disposed on an outer side of the side core. Each of the refractive indices of the center core and the side core has a step-like profile in the direction of the radius of the optical fiber. The bending loss is low. The mode field diameter can be increased without deteriorating the bending loss, and the splice loss can be reduced. The chromatic dispersion varies only to a small extent with respect to changes in the core diameter, so that the zero dispersion wavelength can be well controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.