Real-time 8×200-Gb/s 16-QAM unrepeatered transmission over 458.8 km using concatenated receiver-side ROPAs

We demonstrate real-time 8×200-Gb/s DP-16QAM transmission over a 458.8 km link assisted by one Tx-ROPA and two concatenated Rx-ROPAs. Compared with using only one Rx-ROPA, a 5 dB increase in total link loss was achieved.