Grainat, YoucefMebarki, YaserZitouni, Abdelkader (Supervisor)2022-12-192022-12-192016https://dspace.univ-boumerdes.dz/handle/123456789/1070652 p.The aim of this project is to use digital filters to reduce the effects of dispersion in modern WDM optical communication systems at two transmission speeds, 2.5 and 5 Gbps. For this purpose two types of filters [Gaussian Filter (GF) and Cosine Roll Off Filter (CROF)] have been tested by simulation using OptiSystem and Matlab in single mode fiber links at the operating wavelength of 1550 nm. From the obtained results a comparative study with respect to the conventional Dispersion Compensating Fibers (DCF) has been carried out.enDigital filtersOptical communicationThesis