Abstract
Fiber dispersive and nonlinear effects lead to signal distortions in a fiber optic link, which limits the transmission performance and system capacity. Digital and optical techniques have been proposed to mitigate propagation impairments. In this paper, we give a brief review of digital and optical nonlinear compensation techniques. Then, we present our recent results on three techniques: perturbation-based digital compensation, correlated digital back propagation (DBP), and optical back propagation (OBP). The OBP scheme using dispersion-decreasing fiber is successfully applied to a fiber optic system with mesh configuration and showed 9.8 dB Q-factor gains as compared with the conventional DBP scheme.
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