Patent ID: 6640035
Filing Date: 2003-10-28
Classification: G02B,H01S

Abstract:
A method of making a dispersion compensation fiber for compensation of dispersion in a glass fiber, the method comprising:controlling elliptical shaping of a core of the dispersion compensation fiber for geometric birefringence so that a refractive index profile allows only propagation of two orthogonal and linear polarization states and in order to achieve a dispersion compensation and a definition of the linear polarization states; and determining the refractive index profile in accordance with the elliptical shaping and in accordance with a selected doping of a preform of the dispersion compensation fiber, wherein the refractive index profile is designed for high negative dispersion values in an optical window at around about 1550 nm as well as high positive dispersion values in another optical window at around about 1300 nm with regard to waveguide and material dispersion, in order to be able to compensate dispersion of active fibers in both the optical window and the another optical window and fix the polarization state.