Patent ID: 6583907
Filing Date: 2003-06-24
Classification: H04B

Abstract:
A method for improved performance of a Wavelength-Division-Multiplexed (WDM) fiber optic system including standard unshifted fibers and dispersion compensating fibers with or without a dispersion slope in each fiber, comprising the steps of:(a) changing the level of dispersion compensation in a first amplifier unit of the system; (b) changing the level of dispersion compensation in in-line amplifiers units of the system, where dispersion compensation in the in-line amplifiers is the same; and (c) providing post-transmission dispersion compensation in a last amplifier before detection where the post compensation is different in terms of fiber length from dispersion of the in-line amplifiers unit, in order to (a) compensate for distortion from non-linear effects and (b) permit maximum signal power transmission in the system, in the range of 6 dBm to 12 dBm.