The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2003
Filed:
Apr. 26, 2000
George E. Berkey, Pine City, NY (US);
Lei Jiang, San Diego, CA (US);
Dale R. Powers, Painted Post, NY (US);
V. Srikant, Ithaca, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index n . The core includes at least three radially adjacent regions, a central core region, a moat region having a refractive index n that is sufficiently lower than n such that &Dgr; ≦−0.4%, and a ring region. As the ring region exhibits sufficiently high refractive index at a sufficiently long distance from the outer edge of the moat region, the fiber can exhibit low values of negative dispersion slope at low values of negative dispersion and yet exhibit good bending loss. This ring region is also capable of imparting to the fiber a relatively high cutoff wavelength, so that the present invention is particularly well suited for use in L-band systems. A particularly suitable fiber has an index profile in which that part of the ring region at the transition between the moat and the ring region has a refractive index such that its delta value is close to zero. Also disclosed is a method of forming the fiber of the present invention.