Optical fibre with reduced polarization mode dispersion and...

Optical waveguides – Optical fiber waveguide with cladding

Reexamination Certificate

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C385S122000, C065S475000

Reexamination Certificate

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06920270

ABSTRACT:
A method for determining at least one parameter of a periodic spin function α(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 ε1is about 0.05 and y1is 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 LBis an expected beat length of said optical fiber and α(z) is the derivative of the spin function α(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.

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