ADVA touts 400 Gbps over 100 km via PAM4 for data center interconnect
ADVA Optical Networking and the Technical University of Denmark say they have transmitted 400 Gbps over 100 km via PAM4 optical modulation. The transmission, which comprised eight channels of 50 Gbps apiece, could have implications for low-cost data center interconnect as an alternative to approaches based on coherent transmission.