A system for providing noise reduction in a long-distance telecommunications system is disclosed. A transmitter generates an optical signal. An optical link includes an optical amplifier that transmits the optical signal in a pre-established direction of propagation with substantially compensated dispersion...http://www.google.de/patents/US20010024307?utm_source=gb-gplus-sharePatent US20010024307 - Method for the reduction of noise in a long-distance optical telecommunications system
