The 400G active optical cables are the 8-pair parallel active optical cables for storage, data transmission, and high performance computing connectivity. The cable offers 8 independent data transmission channels and 8 data receiving channels via the multimode fibers with each capable up to 50Gb/s operation. An aggregate data rate of 400Gb/s over 100 meters transmission can be achieved by this cable. It is compliant with the QSFP specifications of SFF8436, SFF8432, SFF8472, and IEEE802.3bm.