Patent ID: 6920271
Filing Date: 2005-07-19
Classification: G02B

Abstract:
1. An optical waveguide fiber having reduced polarization mode dispersion comprising: a core region bounded by a clad layer, said optical waveguide fiber having a birefringence having a fast axis that varies in direction from point to point along at least a portion of the length of said optical waveguide fiber, the variation in direction of the fast axis being in accord with a pre-selected pattern formed in the optical waveguide fiber by a spin function, α(z), wherein the spin function α(z), the spin magnitude, and the modulation parameters are selected to provide, for a fiber having a beat length greater than or equal to about 0.5 meters, a polarization mode dispersion reduction factor which remains less than or equal to 0.50 when the spin magnitude varies up to about 35% of a target spin magnitude value, and where the spin function α(z) is of the form: α(z)=α