Optical Transmission Link with Balanced and Unbalanced Dispersion Distributions and Non-midway Optical Phase Conjugator

Abstract

We propose a dispersion-managed link with a non-midway optical phase conjugator (OPC), in which the residual dispersion per span(RDPS) of each fiber span is different for each transmission section before and after OPC. We numerically demonstrate thecompensation for 960-Gb/s wavelength-division multiplexed (WDM) signals distorted by chromatic dispersion and Kerr nonlinearityof the fiber. We consider different cases for non-midway OPC, including six fiber spans – OPC – 14 fiber spans and 14 fiber spans –OPC – 6 fiber spans. The numerical results show that the compensation of the distorted 960 Gb/s WDM is more efficient when theOPC is placed after 6-th fiber span as compared to after the 14-th fiber span. Our simulation results also indicate that the compensationeffect increases when the difference in net residual dispersion between both transmission sections is not large, but they are not thesame. Under this condition, the larger the magnitude of the RDPSs of each fiber span, the greater the compensation.