A 400G optical module performs photoelectric conversion: With a 400 Gbps transmission rate, these modules support industry evolution from 100M → 1G → 25G → 40G → 100G → 400G → 1T. They form the backbone of high-throughput data center networks and AI clusters. MACOM delivers industry widest portfolio of chip-sets for 400Gbps (4x106Gbps) optical modules. Typical reach of these applications is up to 300m for short reach applications. Cisco offers a range of GBIC, SFP, XFP, SFP+, CXP, CFP, Cisco CPAK, and QSFP+ pluggable modules. The NVIDIA MMS4X00-NS400 is an InfiniBand (IB) and Ethernet (ETH) 400Gb/s, Single-port, OSFP, DR4 single mode parallel transceiver using a single, 4-channel MPO-12/APC optical connector. The Datacenter Reach 4-channel (DR4) design uses 100G-PAM4 modulation and has a maximum fiber reach of. To address these demands, operators are increasingly adopting 400G optical modules—compact, pluggable transceivers capable of delivering up to 400 Gbps per port. This shift is driven by multiple forces: hyperscale data centers require greater east-west bandwidth to support massive internal data. Integrated circuits and reference designs help you create a smaller and faster optical module design used in high-bandwidth data communication applications.