Investigation of Four wave mixing effects using different modulation formats in optical communication system

In this paper, the four wave mixing effect on sixteen channel wavelength divison multiplexing has been compared for different modulation formats at various values of dispersion, core effective area, channel spacing.The performance of system has been evaluated in terms of four wave mixing power, BER and Qfactor.This paper simulates that with increase in the channel spacing,core effective area of fiber, signal interference between input signals decreases hence four wave mixing effect also decreases. It has been observed that for duobinary FWM decreases 1dBm more than NRZ. So duobinary modulation format is best suitable technique to reduce four wave mixing power by varying dispersion from 0 to 4 ps/nm.km, core effective area and channel spacing.