Impact of third-order dispersion in ultra-high speed long-haul optical fiber communication system

This paper presents a comprehensive investigation on pulse distortions due to the third-order dispersion (TOD) on ultra-high speed long-haul single channel optical fiber communication system using OptiSystem. The optical communication system consists of dispersion-managed line with periodic amplification by Er-doped fiber amplifiers. The presence of the TOD introduces broadening and an additional temporal shift on the propagating pulse. The impact of TOD is observed at the receiving end of transmission line considering the variation of different factors such as transmission reach, bit rate, duty cycle, pulse shape and fiber type. Only self-phase modulation, second and third order dispersion, fiber loss, and amplified spontaneous emission (ASE) noise are considered here. BER performance is also observed considering receiver noise. The numerical result shows that temporal effect on pulse center decreases in the case of RZ Gaussian pulse while using SSMFDCF system and when both group velocity dispersion and TOD effects are considered.