These requirements act as a powerful catalyst for ongoing innovation in optical modules. This article explores several mainstream types of optical modules—such as SFP, Xenpak, XFP, SFP+, SFP28, CFP28, and QSFP—highlighting their characteristics, advantages, and suitable. Driven by the explosive growth of AI computing power and the large-scale application of 5G, optical modules, as a core component of communication infrastructure, are entering a critical window of opportunity for domestic substitution. 8 billion in 2025 and is projected to reach $39. 5% during the forecast period from 2026 to 2034. This movement, transitioning from import dependency to strategic self-reliance, is. The optical module is one of the core devices of the optical communication system, and its development has a vital impact on its related industrial chain, from the upstream industry chip substrate, PCB to the downstream telecom market and data communication market, and the field of lidar driverless. As an essential component of optical fiber communication, optical modules are optoelectronic devices that facilitate the conversion between optical and electrical signals during the transmission process. Operating at the physical layer of the OSI model, optical modules are core devices in optical.