Patent ID: 6275636
Filing Date: 2001-08-14
Classification: G02B

Abstract:
A single mode optical waveguide fiber which is dispersion shifted for use over a wavelength range of about 1500 nm to 1600 nm and which reduces non-linear optical effects, comprising:a core region comprising at least two segments, each said segment having a refractive index profile; and,a clad layer, having refractive index n.sub.c, surrounding said core region;said single mode waveguide fiber having a centerline which is the axis of symmetry along the length of said waveguide fiber and a total dispersion zero within the wavelength range of about 1500 nm to 1600 nm, but outside the limits from about 1540 nm to 1560 nm;characterized in that said refractive index profiles are configured to provide an effective area of about 70 microns.sup.2 or greater and a dispersion slope of about 0.12 ps/nm.sup.2 -km or less.