Disclosed is an optical waveguide fiber having a reduced PMD and a method
of making the optical waveguide fiber. The optical waveguide fiber in accord with
the invention has a particular spin pattern impressed upon the optical waveguide
fiber during the drawing step. The spin pattern causes the fast axis of birefringence
to rotate along the long axis of the optical waveguide fiber. The spin functions
in accord with the invention provide for reduced PMD even in cases in which draw
speed, spin magnitude, or modulation parameter vary while the spin pattern is being
impressed upon the optical waveguide fiber.
