Effect of Cross Phase Modulation in Wavelength Division Multiplexing Optical System with EDFA

Optical dense wavelength division multiplexing (DWDM) system using erbium doped fiber amplifiers (EDFA) is getting popularity for communication networks due to its high information capacity, high channel count and low system costs. Nonlinear effects arise due to high transmitting power, which severely degrade the system performance EDFA. Cross phase modulation (XPM) is the most serious effect that affect the length of EDFA and due consideration should be given during design phase. The effect of XPM in an optical WDM system with EDFA is analysed and quantified in terms of realizable parameters. It is observed that in conventional DWDM system with standard operating parameters, the optimum length of the EDFA is 6 m.