Dispersion Compensation Techniques for DWDM Optical Networks

Abstract: Dense Wavelength Division Multiplexing (DWDM) is a promising technology introduced to enhance the channel capacity and increase the bandwidth of the optical fiber communication system. The DWDM technology is based on sending multiple information channels with different wavelengths on a single fiber cable. With high-speed transmission and long distance cables, the information signal faces undesired kind of dispersion called chromatic dispersion. This paper presents two different techniques using Fiber Bragg Grating (FBG) and Dispersion Compensation Fiber (DCF) to compensate for such kind of dispersion. This study has been performed and simulated using Optisystem7 tacking many parameters into consideration such as; Bit Error rate (BER), Quality factor (Q-factor) and Eye height. The simulation has been performed for bit rate of 40 Gbps and cable length of 150 Km.

Keywords: Bit error rate (BER), Chromatic dispersion, DCF, EDFA, FBG, NDSF, NZDSF Q-Factor.