➀ The article discusses the evolving role of optical chips in data communication, highlighting the shift from long-distance fiber optics to short-distance interconnects within data centers. ➁ It analyzes the changing demands of data centers, such as reducing power consumption and cost, and the introduction of new technologies like CPO (Co-Package Optics) to meet these demands. ➂ The article explores Intel's approach to optical interconnects, including the use of chiplets and the challenges of integrating electronics and optics on a single silicon wafer. ➃ It also touches on the history of Intel's Knights Hill project and its cancellation, and the current state of optical computing, including the development of optical processors and quantum computers.