The Effects of the Number of Fiber Spans and Residual Dispersion per Span on the System Performance in Dispersion-Managed Optical Links Combined with Optical Phase Conjugation

The compensation effects of number of fiber spans and the residual dispersion per span (RDPS) in the combining of dispersion management (DM) and the midway optical phase conjugation on the optical transmission link consisted of the long fiber spans with 94 km of SMF length and -160 ps/nm/km of the dispersion-compensating fiber’s dispersion coefficient for 24 channels x 40 Gbps wavelength division multiplexed (WDM) signals. We confirm that the combining technique of DM and the midway optical phase conjugation is still effective to compensate for the distorted WDM signals through the optical link consisted of the long fiber spans. It is also confirmed that the compensation effect on the distorted WDM channels is more increased as the portion of the concentrated compensation is more increased than the portion of in-line compensation.