Fig. 8: BER performance for different transmission distances.
From: Exploring 400 Gbps/λ and beyond with AI-accelerated silicon photonic slow-light technology
a PAM-4 signal of 280 Gbps, 320 Gbps, 360 Gbps, 400 Gbps for B2B, 100 m, 200 m and 300 m SSMF. b PAM-8 signal of 300 Gbps, 330 Gbps, 360 Gbps, 390 Gbps for B2B, 100 m, 200 m and 300 m SSMF. The bi-GRU equalizer is utilized here. For the transmission distance of 300 m, the BERs remain below HD-FEC threshold at 360 Gbps, but deteriorate beyond the HD-FEC threshold at 400 Gbps.
