Patent ID: 7006743
Filing Date: 2006-02-28
Classification: G02B

Abstract:
1. An optical fiber for compensating chromatic dispersion over a plurality of bands of the spectrum, including at least the C band, for wavelength division multiplex transmission networks, including successively, from the center toward the periphery, a core having a varying index profile and then a cladding of constant index, the varying index profile of the core comprising successively, from the center toward the periphery, a central slice whose maximum index is higher than the index of the cladding, a buried slice whose minimum index is lower than the index of the cladding, and an annular slice whose maximum index is higher than the index of the cladding and lower than the maximum index of the central slice, the radii and the indices of each of the slices being determined so that the dispersion compensation optical fiber has, on the one hand, at the wavelength of 1550 nm, firstly a chromatic dispersion of less than −8 ps/nm.km, secondly a chromatic dispersion to dispersion slope ratio whose absolute value is greater than 750 nm, and thirdly a mode diameter greater than 5 μm, and on the other hand, at the wavelength of 1625 nm, bending losses for a radius of 10 mm that are less than 400 dB/m.