Calculation and modeling long-haul DWDM system with advanced format modulation tolerated by chromatic dispersion

In this paper investigate influence of nonlinear effects with no compensation link. The Non-linear optical phenomena greatly enhanced our knowledge about interaction of light with matter and created a dramatic change in optics technology. This nonlinear products will reduce the optical signal to noise ratio (OSNR) which in turn increases the Bit Error Rate (BER). Also, authors propose some solution for calculation OSNR for usage different methods.