Performance Measures of DWDM System under the Impact of Four Wave Mixing

S. Esther Jenifa, K. Gokulakrishnan

Abstract: In optical fiber communication the Bandwidth capacity is increased by using Dense Wavelength Division Multiplexing. In DWDM based optical communication systems, fiber nonlinearities are limiting factors that limit the data rate and Bandwidth capacity. Besides this the nonlinear optical effects also degrade the system performance. This system has implemented in the presence of Four Wave Mixing with equal channel spacing. In this paper, the Hybrid Modulator technique, Return to Zero (RZ) pulse generator and Dispersion Compensation Fiber (DCF) have proposed to reduce the Four Wave Mixing (FWM) in equal channel spacing. The single and combined effect of various parameters such as input power, effective area, channel spacing and fiber length have been analyzed to determine the effect of FWM power. This result shows that increasing sequentially the effective area, fiber length, channel spacing and decreasing the input power to suppress the effect of FWM. At the receiver, the Q-Factor, BER and FWM power are estimated using Opti-system software.

Keywords: FWM-Four Wave Mixing, DWDM-Dense Wavelength Division Multiplexing, Equal Channel Spacing , BER-Bit Error Rate, DCF- Dispersion Compensation Fiber.