Optical fibre with chromatic dispersion compensation

The optical fibre includes successively, from the center towards the periphery, a central bundle of maximum index, greater than the index of the sleeve, a buried bundle of minimum index lower than the index of the sleeve, an annular bundle of maximum index greater than the index of the sleeve and less than the maximum index of the central bundle, a sleeve of constant index. It has, on one part at the wavelength of 1550 nm, firstly a chromatic dispersion lower than -8ps/nm.km, secondly with respective chromatic dispersion on the gradient of the chromatic dispersion whose absolute value is greater than 750nm, thirdly a diameter of mode greater than 5micrometres, and on the other part at a wavelength of 1625nm, of loss of curvature for a radius of 10mm which are lower than 400db/m.