Transmission Rate: The maximum speed the module supports (e., 1G, 10G, 25G, 100G, 400G). Critical for network bandwidth. Fiber Type: Single Mode. Optical modules, including the advanced 25G SFP28 transceiver, play a pivotal role in modern communication systems, facilitating the transmission of optical signals. 2” pluggable : 2% of the cTE budget ITU-T G. This article will analyze key performance parameters such as transmission rate, wavelength, numerical. The working principle of optical modules is illustrated in the diagram shown in the Optical Module Working Principle Diagram. The transmitting interface inputs electrical signals of a certain bit rate, which are then processed by internal driver chips.