Co-Packaged Optics (CPO) is an optoelectronic co-packaging technology that integrates an optical module (responsible for optical signal transmission and reception) and a switch ASIC (responsible for electrical signal processing) into the same physical package. NVIDIA is integrating silicon photonics directly with its NVIDIA Quantum and NVIDIA Spectrum switch ICs to improve data center networking, resulting in 3. Unlike traditional pluggable optical. 1State Key Laboratory of Information Photonics and Optical Communications (IPOC), Beijing University of Posts and Telecommunications, 10 Xitucheng Rd, Bei Tai Ping Zhuang, Haidian Qu, Beijing, 100876, China 2IPI-ECO Research Institute, Eindhoven University of Technology, 5600MB Eindhoven, The. Optical Circuit Switching (OCS) has emerged as a critical technology for next‐generation Artificial Intelligence (AI) and hyperscale data‐center networks. Unlike traditional packet switches that process and buffer data electronically, OCS transmits signals transparently at the speed of. OFC 2025 made one thing clear: The transition to Co-Packaged Optics (CPO) switches in data centres is inevitable, driven primarily by the power savings they offer. From Jensen Huang showcasing CPO switches at GTC 2025 to a wide range of vendors demonstrating optical engines integrated inside ASIC.