Compensation of Self Phase Modulation by Anomalous Dispersion in Nonlinear Optical Communication Systems

Abstract

In nonlinear optical systems, self phase modulation gives positive frequency chirp which increases pulse broadening. Anomalous group velocity dispersion in fibers gives negative frequency chirp. The positive frequency chirp due to self phase modulation is compensated by negative frequency chirp due to group velocity dispersion. In order to minimize the effect of self phase modulation in optical systems the proper group velocity dispersion is required. In this paper the effect of positive and negative group velocity dispersion is shown on self phase modulation. The simulated results show that the interaction of anomalous group velocity dispersion with self phase modulation gives improved system performance. Hence in nonlinear optical system the self phase modulation can be compensated by anomalous dispersion.