Single channel 112Gbit/sec PAM4 at 56Gbaud with digital signal processing for data centers applications

112Gbit/sec DSP-based single channel PAM4 at 56Gbaud that fits into QSFP is experimentally demonstrated.

The DSP enables use of mature 25G optoelectronics for 2-10km datacenter intra-connections, and 8Tbit/sec over 80km interconnections between data centers.