Single fiber modules (BiDi) use one fiber for both transmitting and receiving data. Dual fiber modules use two fibers. They use a thin fiber. Optical Transceivers SFPs 800G OSFP/QSFP-DD800, 400G QSFP112/QSFP-DD, 200G QSFP56, 100G QSFP28/CFPx, 40G QSFP+, 25G SFP28, 25G SFP28 Tunable DWDM, 10G SFP+/XFP/X2, 10G Tunable DWDM, 1G SFP, 155M SFP, DAC, and AOC. Ever wonder how data zooms across cities and continents at lightning speed? The. Optical fibers are among the most transformative technologies in modern photonics, quietly enabling the global internet, precision sensing, minimally invasive medicine, and high-power industrial laser systems. Although they can do the same job in some instances, the different construction methods make each of them better suited to certain tasks and budgets.