Importance

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Abstract

A method of repairing a slope-matched cable system that leaves the net chromatic dispersion of the system nominally unchanged comprises removing a portion of the slope-matched cable system that is faulted, either the cable or a repeater, and constructing a replacement cable portion from two N-P cable lengths having negative dispersion fibers and positive dispersion fibers and a P cable length having positive dispersion fibers. The N-P cable lengths are coupled on each side of the P cable length and the replacement cable portion is connected to the slope-matched cable where the faulted cable was removed. The method also accounts for the extra cable that necessarily has to be added during the repair and for the replacement of a faulted repeater. A cable repair can be made in a regular cable section or in a compensation cable section, in which case the replacement cable portion can also include a repair repeater with LBOs to leave the gain shape of the transmission spectrum nominally unchanged and allows for replacement of a gain equalizer if one was removed during the repair. Similarly, when a faulted repeater is removed the replacement portion can include a replacement repeater, as well as a repair repeater, to leave the gain shape of the transmission spectrum nominally unchanged.

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First Claim