400G QSFP-DD AOC (Active Optical Cable) is a high-speed active optical cable used to connect data centers, computer networks, and communication equipment. It utilizes the QSFP-DD (Quad Small Form-factor Pluggable Double Density) interface and supports a transmission rate of 400Gbps. The AOC cable consists of an active optical module and optical fibers, with the optical module containing optoelectronic converters that convert electrical signals to optical signals for high-speed transmission through the optical fibers. This cable offers high bandwidth, low latency, and stable data transmission, making it suitable for applications that demand high-speed data transfer performance. It is capable of high-speed data transmission over short distances while maintaining low power consumption and high reliability.