Characterization of distributed mode crosstalk in few-mode fiber links with low MIMO complexity |
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| Institution: | 1. Tianjin Key Laboratory of Wireless Mobile Communications and Power Transmission, Tianjin Normal University, 393 Binshuixidao Rd., Tianjin, 300387, China;2. PKUHS Tianjin School (Dongli Lake), Qingjingdadao Rd., Tianjin, 300309, China;1. IT - Instituto de Telecomunicações, Portugal;2. ISCTE - Instituto Universitário de Lisboa, Portugal;3. FCT - Universidade Nova de Lisboa, Portugal;4. DETI - Universidade de Aveiro, Portugal;1. Department of Electrical & Computer Engineering, University of Patras, Greece;2. Division of Computer Science and Informatics, London South Bank University, United Kingdom;1. DEIB - Politecnico di Milano, Milano, 20133, Italy;2. IEIIT - CNR, c/o DEIB - Politecnico di Milano, Milano, 20133, Italy;1. Department of Electrical Engineering, University of South Florida, United States;2. Department of Electrical and Electronics Engineering, Istanbul Medipol University, Turkey |
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| Abstract: | We theoretically model and numerically analyze the linear behavior of distributed mode crosstalk in a step-index weakly-coupled 7-mode fiber. This fiber is assumed to be used for one-polarization uncoupled mode-division multiplexing (MDM) systems with: (1) sparse MIMO equalizers which are performed over only degenerate LP modes, or (2) one single differential mode delay-independent MIMO equalizer which is performed over all non-degenerate LP modes. For the above two low-complexity MIMO configuration schemes, the impacts of distributed mode coupling on the multi-path interference-dependent achievable distance and system quality are empirically evaluated, through the numerical simulations for uncoupled MDM transmissions of a single-channel 28 GBaud QPSK signal over the fiber. |
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| Keywords: | Few-mode fibers Mode crosstalk Mode-division multiplexing Fiber optics communications |
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