Patent ID: 6856770

Claim:
A system for transmitting signals over an optical fiber using spectrally enriched optical pulses comprising: an optical transmitter with an optical source for generating data modulated spectrally enriched optical pulses with a frequency chirp which is similar in shape and opposite in sign to a self-phase-modulation-induced chirp and having a spectrum substantially wider than a spectrum of Fourier-transform limited pulses of the same duration; a frequency chirp converter coupled to an input of said optical fiber for providing an externally induced frequency chirp and converting the frequency chirp of said spectrally enriched optical pulses; and an optical receiver placed within the optical fiber at or beyond an error free propagation distance from said optical transmitter for receiving said optical pulses, wherein a spectrum of said optical pulses being gradually depleted while propagating along the optical fiber; and a degree of depletion is slowing down due to a non-linear spectrum of said optical pulses caused by said externally induced frequency chirp.