Design of a 32×5 Gb/s DWDM Optical Network over a Distance of 1000 km

Growing demands of the internet users is one of the reasons that lead using dense wavelength division multiplexing (WDM) networks to transmit optical data. This modulation technique has the capability of transmitting several wavelengths through a single optical fiber. In this study, we have simulated a 160 Gb/s DWDM network with transmission power of 0 dBm, using NRZ encoding technique through a 32-chanels optical transmitter over a distance of 1000 km. To this aim, we have assumed a link of 10 spans with a length of 100 km fiber for each span. An EDFA and a DCF have been used for amplifying signals and compensating pulse dispersion, respectively. All simulations have been run by using Optisystem software. The quality of the network was estimated by using the eye-diagrams of the received signals. The maximum quality factor of 20.7 and minimum bit error rate of 7.6×10 -95 are obtained at wavelength of 1552.5 nm. The eye-diagrams showed an ideal quality for the received signals. More research works are needed to evaluate the parameters that affect on the quality of the DWDM optical systems.