PERFORMANCE ESTIMATION OF LONG-HAUL OPTICAL TRANSMISSION SYSTEM OVER A COHERENT SYSTEM USING GAUSSIAN NOISE MODEL

Abstract

The demand for internet capacity is expected to increase exponentially owing to more implementation of the Internet of Things and 5G which requires high speed and data volume to be delivered to clients. To accommodate this internet demand in the future, fiber optics is the most viable alternative for delivering reliable high-speed Internet access with good quality of service. Optical Transmission systems (OTSs), however, suffer from signal impairments such as nonlinearities in optical fibre and Amplified Spontaneous Emission noise. Signal impairments due to fiber nonlinearities become more significant as the optical power, transmission distance, capacity and the number of channels in the fiber are increased. Hence, to maintain the quality of the transmission as the length of the transmission increases, the Gaussian Noise (GN) model, a reliable tool for performance prediction over a wide range of system scenarios, was used to check for signal distortion. Noise estimation and optical signal-to-noise ratio were used to measure the quality of transmission while the obtained results were also used to evaluate the performance of longer-distance OTS. This paper addresses the nonlinear issue and provides possible solutions to identified challenges.