3 MDM × 8 WDM × 320-Gb/s DP-32QAM transmission over a 120km few-mode fiber span employing 3-spot mode couplers

We verify three mode-division multiplexed×8 wavelength-division multiplexing×320-Gb/s DP-32QAM transmission over a 120km differential-group-delay compensated few-mode fiber using low-loss 3-spot mode couplers based on a single 3-surface prism.