Lumentum’s 400G QSFP-DD Active Optical Cable (AOC) provides high-speed, low-latency optical connectivity for short-reach interconnects in hyperscale and enterprise data centers. Each cable integrates eight transmit and eight receive channels operating at 53.125 Gbps with PAM4 modulation for an aggregate bandwidth of 400 Gbps. Built on reliable 850 nm VCSEL technology and with an integrated DSP, the module ensures superior signal integrity with a low power consumption of 8 W per end. Supporting cable lengths up to 100 meters, it is fully compliant with the QSFP-DD MSA, IEEE 802.3cd, and CEI-56G-VSR standards. Designed for plug-and-play installation, it delivers high performance and proven reliability for dense top-of-rack, spine, and server interconnects where power efficiency and link stability are critical.