Patent ID: 7171092

Claim:
An optical fiber with compensation of chromatic dispersion in the S band from 1 460 nm to 1 530 nm, for use in wavelength division multiplex transmission networks, having a negative chromatic dispersion at the wavelength of 1 495 nm, comprising successively from the center toward the periphery a core having a varying index profile and then a cladding of constant index, said varying index profile of said core comprising successively, from said center toward said periphery, a central slice having a maximum index higher than the index of said cladding, a first buried slice having a minimum index lower than the index of said cladding, an annular slice having a maximum index higher than the index of said cladding and lower than the maximum index of said central slice, a second buried slice having a minimum index lower than the index of said cladding, radii and the indices of each of said slices being determined so that said dispersion compensating optical fiber has at the wavelength of 1 495 nm a chromatic dispersion to dispersion slope ratio whose absolute value is from 68 nm to 158 nm.