Patent ID: 7289740

Claim:
A multichannel wavelength-division multiplex fiber optic transmission system, comprising: an optical transmitter; and an optical receiver connected to the optical transmitter by an optical line, the line comprising: at least one optical fiber, and at least one set of channel regenerators, wherein each one of the set of channel regenerators regenerates, by compensating for a distortion of a signal, only a predetermined respective group of channels, each respective group forming a non-overlapping subset of a set of channels to be regenerated, and each channel of the groups is predetermined based on channel wavelength, and wherein each channel regenerator is positioned at a predetermined distance on the optical line from other channel regenerators from said at least one set of channel regenerators and said each channel regenerator is positioned in series with respect to other channel regenerators from said at least one set of channel regenerators, and wherein the set of channels transmits signals from the transmitter to the receiver.