Phase-modulated transmission format with non-central chirp over high-speed optical link communication without dispersion compensation

Abstract: A communication line without dispersion compensation is considered. A new type of phase-modulated format in which the Gaussian pulses with varying non-central chirp are transmitted is proposed. It is stated that there is a time shift between the pulses with respect to each other. Numerical simulation with the use of 8-PSK format as an example shows that this method of pulse shaping at the beginning of the line leads to a smaller nonlinear distortion of the signal even with relatively small chirps.

Keywords: fiber-optical communication lines, mathematical modeling, Schrödinger non-linear equation, phase modulation, non-central chirping.