This Open Compute Project (OCP) white paper surveys major OCS technologies, including robotic mechanisms, Micro-Electro-Mechanical-System (MEMS) beam steering, liquid‐crystal devices, piezo‐actuated systems, and silicon‐photonics switches, comparing trade‐offs in radix . This Open Compute Project (OCP) white paper surveys major OCS technologies, including robotic mechanisms, Micro-Electro-Mechanical-System (MEMS) beam steering, liquid‐crystal devices, piezo‐actuated systems, and silicon‐photonics switches, comparing trade‐offs in radix . FEC (Forward Error Correction), DSP (Digital Signal Processing), CDR (Clock and Data Recovery), DRV (Driver), TIA (Trans-Impedance Amplifier), TOSA (Transmitter Optical Sub-Assembly), and ROSA (Receiver Optical Sub-Assembly). Low latency: Reduces processing and recovery time by eliminating stages. Since the release of ChatGPT and DeepSeek-R1, large-scale AI models have developed rapidly. However, the exponential growth in the volume of data and parameter scales used in their training processes has imposed higher requirements on computational power and computing resource utilization rate. At this year's OCP Global Summit, “Co-Packaged Optics (CPO)” became a frequently mentioned buzzword. This paper discusses reconfig-urable optical networks as the key enabler for scaling AI systems. Introduction Large-scale AI systems are the foundation of modern online services. 2023, the State Council issued the "Overall Layout Plan for Digital China Construction.