High-Order Mode-Group Multiplexed Transmission over a 24km Ring-Core Fibre with OOK Modulation and Direct Detection

We demonstrate 2×10Gbit/s error-free (BER<10
⁻¹²
) mode-group multiplexed transmission over a 24km step-index ring-core fibre using two high-order mode-groups with OOK modulation and direct detection. All-optical (de)multiplexing is enabled by inherent low mode-coupling of the fibre and mode-selective SLM based spatial (de)multiplexers.