Single fiber modules (BiDi) use one fiber for both transmitting and receiving data. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside. 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. An optical module works at the physical layer of the OSI model and is one of the core components in the fiber communication. That is, metal medium communication represented by coaxial cables and network cables is gradually being replaced by optical fiber media.
