Patent ID: 6701052
Filing Date: 2004-03-02
Classification: G02B

Abstract:
A single mode optical waveguide fiber comprising:a core region surrounded by and in contact with a clad layer, wherein the core region and the clad layer each have respective refractive index profiles and are configured to guide light through the waveguide fiber; wherein, said core region includes at least three segments, a central segment, a first annular segment surrounding the central segment, and a second annular segment surrounding the first annular segment, wherein, each said segment has a respective index profile, inner and outer radius, and relative index selected to provide a waveguide fiber having a total dispersion at 1550 nm in the range of âˆ’30 ps/nmâˆ’km to âˆ’60 ps/nmâˆ’km, total dispersion slope at 1550 nm in the range of âˆ’0.09 ps/nm2âˆ’km to âˆ’0.18 ps/nm2âˆ’km, and attenuation at 1550 nm less than or equal to 0.30 dB/km.