Experimental Investigation of Intermodal Nonlinear Signal Degradation in a Few-Mode Fiber Transmission System

We experimentally investigate intra- and intermodal nonlinear signal degradation in a 36 km few-mode fiber based space-division multiplexed transmission system. We find that both, intra- and intermodal cross-phase modulation lead to equally strong $Q$-factor penalties of up to 8 dB.

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