We introduced 5 Application Scenarios of Optical Modules in this article, Data Centers, Mobile Communication Base Station, Passive Wavelength Division systems, SAN/NAS Storage networks, and 5G Bearer networks. What application scenario is your optical module used in?With the large-scale deployment of trillion-parameter AI large models such as multimodal LLMs, and the emergence of new computing scenarios like distributed training and real-time inference, the east-west traffic inside data centers is growing at an annual rate of over 50%. (2) Fibre Chanel: Mainly used in Fibre. Commonly used options include: 1. 25G Optical Modules: These modules offer a cost-effective solution for shorter-distance links, typically within a few kilometers. In 2021, about 70% of data center east-west traffic will remain within the data center, and the growth rate is. Internet companies and cloud service providers (CSPs) are upgrading their data center network infrastructure from 100G to 400G to meet higher bandwidth demands and lower latency requirements. Transmission Format LR4 is used for long-distance transmission, SR4 is suitable for short distances, and ER4 can support ultra-long distance transmission.