FIBER network modeling that enables the accurate prediction of the system performance is critical to designing anddeployingoptimizedhigh-speedWDMfibernetworks.The goals of these efforts should include crafting engineering rules to aid the design of new fiber deployments and in the upgrade of existing fiber infrastructure. The traditional system modeling involves computationally intensive time-domain modeling offibernonlinearitiestogetherwithfrequencydomainmodeling of dispersion. Thus, fiber network modeling is often a tedious endeavor further complicated by the variety of span lengths