Abstract: To improve overall system performance and reduce dispersion, several compensation technologies are proposed. In this paper, dispersion compensation scheme in WDM system is studied. For optical communication the widely used dispersion compensation technologies are Dispersion Compensating Fiber (DCF) and Fiber Bragg Grating (FBG). Here an 8 channel optical network is used with two dispersion compensators ie., DCF and FBG. For DCF three compensation schemes (Pre, Post and Symmetrical) are modelled and for FBG two compensation schemes (Pre and Post) are modelled. NRZ modulation format is used in transmitter. From BER and Q-factor, it is observed that FBG when used in post compensation is better than all other compensation schemes.

Keywords: Wavelength Division Multiplexing (WDM), Dispersion, Dispersion Compensating Fiber (DCF), Fiber Bragg Grating (FBG), Q-factor, BER.