REALSEA 400Gbps QSFP-DD active optical cable can providenew generation performance of QSFP-DD by higher date transfer rate.REALSEA AOC is a high-performance optical cable for short-reachcommunication and interconnect applications. The AOC operatesover multimode fiber cable by using a nominal wavelength of 850nmVCSEL laser. The U-QSFP-DD AOC cable length can be custom izedto various length. There are eight channel signal lanes in each directionwith 400Gbps aggregate band width. Each electrical lane operatesat 26.5625 Gbps / 53.125 Gbps (PAM4 encoded). The electrical interfaceis mated with the standard 76-pin connector. And all the design isbased on the industry standard specifica tions, such as SFF-8679,SFF-8636 and QSFP-DD MSA specification.