Accelight’s QSFP-DD 400Gbps transceiver module is designed for optical communication applications in 400 Gigabit Ethernet links over 120km single mode fiber. This product converts 8 channels of 50 Gbps (PAM4) electrical input data to single channel of 400Gbps (DP-16QAM) coherent optical signals. Reversely, on the receiver side, 400Gbps (DP-16QAM) coherent optical signals is converted to 8 channels of 50Gbps (PAM4) electrical output data. The electrical interface of the module is compliant with the 400GAUI-8 interface as defined by IEEE 802.3bs, and the form factor, optical/electrical connection, and digital diagnostic interface compliant with QSFP-DD MSA.