Numerical Modelling of High Bit-Rate Dispersion Managing Systems

Abstract

This thesis presents the results of numerical modelling of the propagation of dispersion managed solitons, in standard fibre using fibre grating for dispersion compensation. The theory of optical fibre and propagation in single mode optical fibre is introduced, followed by numerical technique to solve the nonlinear Schrödinger equation. The recent development in the use of dispersion managed solitons are discussed before the numerical results are presented. The work in this thesis covers the upgrade of the installed standard fibre network to higher data rates through the use of solitons and dispersion management. The use of dispersion management has been investigated using fibre grating for dispersion compensation, both as single pulse and for the transmission of a 10 Gbit/sec data pattern. It has been found that by placing the amplifier and grating at an optimum position stable propagation is possible at high data rates. The interest has increased over recent years in use of EDFAs and dispersion management to upgrade installed standard fibre network to higher data rates. This thesis presents a study of propagation of data at both 10 Gbit/sec and 40 Gbit/sec. Propagation over Trans-oceanic distances is possible for 10 Gbit/sec and for more than 1500km at 40 Gbit/sec. The use of dispersion managed solitons in the future of optical communication systems is discussed in the thesis conclusions.