Optical modules convert electrical signals into light to move data quickly and reliably in AI systems, enabling fast and smooth data processing. 2023, the State Council issued the "Overall Layout Plan for Digital China Construction. Being an industry group uniting representatives of the data and optical worlds, OIF's purpose is to accelerate the deployment of interoperable, cost-effective and. Optical Circuit Switching (OCS) has emerged as a critical technology for next‐generation Artificial Intelligence (AI) and hyperscale data‐center networks. The fourth industrial revolution, Industry 4. 0, is fundamentally altering the manufacturing landscape. Central to this. Although optical spectroscopy has emerged as a prominent research focus, its application in complex manufacturing scenarios continues to confront significant technical barriers. This review establishes three concrete objectives: To categorize AI–optical spectroscopy integration paradigms spanning.