DSP techniques for reducing chromatic dispersion in optical communication systems

Abstract

In this paper the chromatic dispersion is reduced for enhancement in the performance of optical communication system. For this an analog test signal is generated and converted into digital domain and modulated with 16 QAM by gray code mapping. Through Split Step Fourier technique the signal is propagated in the optical fiber link for 15 km of simulated distance. At the end of this distance the chromatic dispersion is observed and to reduce Chromatic Dispersion (CD) signal is converted in electrical form at end of optical fiber link. Digital Signal Processing techniques are applied on dispersed signal to reduce the CD. Analysis is based on Bit Error Rate that are compared before and after the induction of chromatic dispersion. In this research CD is reduced electronically so it will save the requirement of optical amplifiers.