A system and-method for reducing timing and amplitude jitter in transmission of Retrun-to-Zero modulated pulses is described. In the reduction of amplitude jitter the modulated pulses must be phase coherent. The method comprises the steps of measuring a total dispersion of a transmission fiber link, computing an optimal amount of pre-chirp to be added at an input of said transmission fiber link, computing an optimal amount of pre-chirp to be added at an output of said transmission fiber link, adding said optimal amount of pre-chirp to said input of said transmission fiber link and adding said optimal amount of pre-chirp to said output of said transmission fiber link. The system for reducing timing jitter in transmission of Return-to-Zero modulated pulses comprises means for measuring a total dispersion of a transmission fiber link, means for computing an optimal amount of pre-chirp to be-added at an input of said transmission fiber link, means for computing an optimal amount of pre-chirp to be added at an output of said transmission fiber link, means for adding said optimal amount of pre-chirp to said input of said transmission fiber link and means for adding said optimal amount of pre-chirp to said output of said transmission fiber link.