Optical fibre with reduced polarization mode dispersion and method for obtainingan optical fibre with reduced polarization mode dispersion

摘要

A method for determining at least one parameter of a periodic spin function alpha(z) with period p, to be applied to an optical fiber along its length z during a drawing process. At least one parameter is selected so that (I) where epsilon₁ is about 0.05 and y₁ is the first of the three components y₁(z), y₂(z), y₃(z) of a periodic function y(z) of period p such that (II) where L_B is an expected beat length of said optical fiber and alpha(z) is the derivative of the spin function alpha(z) with respect to the length z. The method is effective for substantially reducing the PMD of optical fibers drawn when applying a spin function.