Modeling of single-channel optical transmission systems with high-order ASK and PSK modulation formats

This paper is focused on numerical investigation of optical signal propagation in the single-channel transmission systems, which employ novel types of high-order modulation formats. In the paper we present comparison of two types of high-order modulation formats, namely Amplitude Shift Keying (M-ASK) and Phase Shift Keying (M-PSK). The investigation is based on solving the nonlinear Schrodinger equation (NLSE) through Split-Step Fourier Method (SSFM). The using of high-order modulation format is one of the key solutions for future optical networks and systems. Our aim is to describe the behavior of modulated pulses and show the suitability of using the investigated modulation formats, when their transmission is influenced by various kinds of optical channel impairments.