Fiber characteristics for next-generation ultra-long-haul transmission systems

Abstract

The availability of coherent detection and its capability to compensate for chromatic dispersion will have a clear impact on system design and fiber characteristics especially for ultra-longhaul systems. IntroductionThe revolution brought by coherent detection associated with digital signal processing and multi-level modulation format started around 5 years ago with a first demonstration of the concept [1], then a demonstration of large chromatic dispersion compensation at 40Gb/s [2], a WDM Ultra Long Haul experiment [3] and a first 100Gb/s experiment [4]. For 2 years, almost all record experiments reported have used coherent detection and most of them do not use optical dispersion compensation in the line. Fig 1 depicts the evolution of the record experiments by plotting the product of capacity times distance versus the years as a function of detection scheme used.

Large-Area Low-Loss Fibers and Advanced Amplifiers for High-Capacity Long-Haul Optical Networks [Invited]

“…A simple figure of merit (FOM) was proposed to compare the new class fibers with standard single-mode fiber (SSMF) [10], which is described as follows:…”