Design and Performance Study of Soliton based WDM systems for long distance optical communication

Abstract

The global demand for secure, large distance and high-speed internet services are increasing day by day with the increase in number of users. In order to meet these rising demands, the technologies used in optical communication system need to improve rapidly to keep up the pace. The evolution of fiber optics thus results in broadband connections which provide uninterrupted high speed internet services for large distances. The achievement of having some high data rate communication schemes in any optical fiber systems used for communication is limited by dispersion. Dispersion affects the transmission capacity of the system badly and thus the bandwidth gets reduced. Solitons are an effective solution for overcoming attenuations occurring due to dispersion. Solitons are narrow pulses that can retain their shape after propagating through a large distance but it undergoes interactions and distortions while used in DWDM systems. In this paper, performance of an 8 channel DWDM system at 40 Gbps bit rate employing different dispersion compensation is done and are analyzed in terms of Q-factor and Bit Error Rate (BER). In this design both Dispersion Compensation Fiber (DCF) and Fiber Bragg Grating (FBG) are used for improving Q-factor. The results shows that a Q-factor of about 52.1526 with a min BER of zero is obtained.