Combating SRS and FWM in an Optical Fiber through Unequal Spacing and Dispersion

In DWDM system, the major non-linearities such as SRS and FWM occurs simultaneously in Long-Haul Communication. As the optical signal propagate through the fiber undergoes power fluctuations and crosstalk between the channels in DWDM system. Due to this major problem, the performance of DWDM system get degrades. In this paper, the effect of SRS and FWM affecting the original Dense Wavelength Division Multiplexed (DWDM) signal power simultaneously is studied and its effect on unequal channel spacing and dispersion is analyzed in fiber optic link. The unequal channel spacing and dispersion are common methods to mitigate the effect of both SRS and FWM in the transmission fiber of DWDM system. This paper also dealt how the combined effect of SRS and FWM makes the signal strength weaken in Long-Haul Communication. The Power Tilt value is compared with unequal channel spacing and unequal channel with dispersion co-efficient.