ELIMINATING FOUR WAVE MIXING WITH DYNAMIC CHANNEL SHUFFLING IN DWDM OPTICAL NETWORK

Optical Fiber systems are major telecommunication base for worldwide broadband networks. The bandwidth capacity is increased by using DWDM optical networks. But in DWDM Optical Communication System, the nonlinear effects degrades the system performance. FWM is a nonline ar effect that appears at very high optical power and dense channel spacing. When the channels are equally spaced in a DWDM system, the new waves will be generated by FWM and these new waves will drop at channel frequencies, giving rise to crosstalk. Fou r - wave mixing (FWM) is a parametric approach in which distinct frequencies interact causing the generation of new spectral components. Coming generation optical networks insists on the use of the high input power and high bandwidth capacity to accomplish bigger data rates. However, enlarging input power and reducing channel spacing create nonlinear effects including Four Wave Mixing (FWM). So a technique using circular polarizers along with proposed algorithm namely Dynamic wavelength shuffling algorithm i s implemented which results in reduction of FWM to a greater extent and results are formulated in terms of Q - factor, SNR and BER.