Patent ID: 6301422
Filing Date: 2001-10-09
Classification: G02B

Abstract:
A single mode optical waveguide fiber, comprising:a core region having a central segment and at least a first annular segment surrounding the central segment, each said segment having a refractive index profile and an inner and outer radius; and,a clad layer having a refractive index profile;wherein at least one segment of said core region has a minimum refractive index less than the minimum refractive index of said clad layer, and,the respective refractive index profiles and radii of the central segment and the at least one annular segment are selected to provide single mode optical waveguide fiber having an effective area greater than about 70 .mu.m.sup.2, a total dispersion slope less than about 0.09 ps/nm.sup.2 -km, and positive total dispersion over wavelengths greater than about 1500 nm, and,the induced attenuation due to pin array bending is less than about 12 dB/km and preferably less than about 8.0 dB/km.