Abstract
Dense wavelength division multiplexing (DWDM) is usually used on fiber optic backbones and long distance data transmission. Due to the feature of constant light intensity, the WSK modulation is used to reduce the unwanted cross gain modulation in a semiconductor optical amplifier and the four-wave mixing in a WDM system. This paper analyses the effect of fiber nonlinearity, Stimulated Raman Scattering (SRS) in DWDM transmission system with direct detection binary WSK receiver. The performance results are evaluated in terms of Bit Error Rate (BER) by changing system parameters at a bit rate of 10 Gb/s and above. It is noticed that the system performance degrades with power penalty and the maximum amount of power penalty for 32 channels at 10−9 BER is −36.95 dB for channel spacing 80 GHz and the length of the fiber of 120 Km.
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