Optical modules can be divided into: 100Mbps optical modules: Usually labeled as 155M, 100Base, FE, etc. SFP (Small Form-factor Pluggable) optical modules are compact, hot-pluggable transceivers that enable network equipment to connect seamlessly to fiber and copper links. 1Gbps: This is one of the most widely used optical module rates in the past, and is generally used for Gigabit Ethernet applications. 10Gbps: 10Gbps optical modules are used in high-speed communication applications such as 10 Gigabit. Just a decade ago, 100G (100 gigabits per second) modules were the pinnacle of innovation, powering early cloud computing infrastructures. Today, 400G has become the baseline for hyperscale data centers, supporting the bandwidth needs of AI training and real-time analytics.