Simulation study of chromatic dispersion effects on optical signals at 10 Gbps, 40 Gbps, 100 Gbps and 200 Gbps bit rates propagating in a 30 km ITU-T G.652.D optical fiber link

For more than four decades, telecommunication systems have been experiencing an unprecedented growth, due to the invention of optical fibers. Data is transmitted through optical fibers in the form of light. As they propagate through the optical fiber, light pulses undergo effects of different kinds and origin due to certain phenomena like chromatic dispersion which is a phenomenon caused by the variation in refractive index as a function of wavelength. As a result, the different components of a light pulse propagate in the optical fiber at different speeds. It reduces the quality of the transmitted signal through inter-symbol interference and therefore limits the performance of optical communication networks, especially when transmission rates become high. It is important to study this phenomenon with a view to reducing its drawbacks in this type of network. Based on a simulation using Optisystem we study and analyze the effect of chromatic dispersion in in a 30 km ITU-T G.652.D optical fiber optic link of a metropolitan’s backbone network. The NRZ modulation format is considered using data rates of 10 Gbps, 40 Gbps, 100 Gbps and 200 Gbps, and the study is carried out at a wavelength of 1550 nm with a power of 10 dBm (10 mW). The results obtained show a decrease in signal amplitude and a broadening of the spectrum, resulting in distortion of the transmitted signal and considerable loss of data mainly when the bit rate increase.