Coupled fiber optic channels
The proposed project is combined theoretical-experimental in nature and will work on spatially multiplexed fiber optic transmission. This means that we will study propagation and mode coupling in multimode and coupled-core fibers, intended for high-capacity transmission. Numerous record-achieving experiments have showed beyond all doubts the potential of these fibers to transmit extremely high data rates (the current record being 10 Pb/s in a 19-core x 6-mode fiber) However, there are still some crucial issues that need further study before these links can become a reality. The most important of these - and which is in focus for the project - is the speed and properties of the random mode-coupling in the fibers. The temporal drift times are not well known, since all system experiments are based on transmission of short (microseconds) bursts of data. The proposed project will comprise 3 tasks. The first task is devoted to experimental characterization of few-mode and couped-core fibers. We plan to develop novel measurement techniques based on dual-comb spectroscopy to perform the fast and broadband measurements required. The second task is theoretical and builds on the first, aiming to develop realistic channel models of the temporal drift. Such channel models are important in simulations and design of transmission algorithms. The third task is again experimental, and will explore linear and nonlinear transmission schemes that exploit the coupled channels in novel ways.
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- Swedish Research Council (VR) (Public, Sweden)