الفهرس | Only 14 pages are availabe for public view |
Abstract Although wavelength division multiplexing (WDM) is considered the relevant technology to cope with the remarkable growth of the internet protocols and multimedia applications, it suffers from the nonlinear transmission impairments, especially for long-haul WDM networks. This thesis studies in details two dominant nonlinear effects, namely; four-wave mixing (FWM) and stimulated Raman scattering (SRS). A mathematical model for a typical WDM network is introduced. The performance analysis is investigated taking into consideration the main parameters including the transmitted power, frequency separation, transmission fiber length, and various fiber types. Theoretical results show that the nonlinear phenomenon has a detrimental influence on the system performance and the dominant nonlinear effect is interchangeable between FWM and SRS depending on the assigned frequency of each user in the network. In addition, a channel allocation method is assessed as an effective technique to reduce the deleterious effect of the nonlinear impairments. Finally, the simulation of a WDM network is performed by OptiSystem software to verify some theoretical aspects. |