Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 34, Issue 9, Pages 2280-2287Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2016.2520562
Keywords
Mode-division multiplexing (MDM); multimode fiber; nonlinear propagation; space-division multiplexing
Funding
- German Research Foundation DFG [PE 319/29]
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Space-division multiplex has become a promising approach to overcome future capacity shortages in long-haul optical transmission systems. In this paper, we present an analytical approach to calculate the nonlinear interference between signals that travel in different fiber modes of a multimode fiber SDM system. We discuss several simplifications based on intra-and intermodal four-wave mixing theories, and compare the analytical model with simulations in an exemplary few-mode fiber transmission system with three and six spatial modes. To generate a deep understanding of the impact of intermodal nonlinear signal distortions, we focus our analysis on the relative strength of intra- and intermodal nonlinearities. A good agreement between the analytical model and numerical simulations is found, making the model an easy-to-use tool to estimate the overall nonlinear distortion in space-division multiplexed transmission systems with multimode fibers.
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