An optical transceiver, also known as a fiber optic transceiver or optical module, is a small packaged device that uses fiber optic technology to transmit and receive data. Operating at the physical layer of the OSI model, optical modules are core devices in optical. The optical node is a fundamental piece of modern telecommunications infrastructure, serving as the transition point between high-speed fiber optic backbone networks and the existing copper wiring that extends service to homes and businesses. This active electronic device converts light signals. The optical module serves as a crucial component in optical fiber communication systems, operating at the physical layer, which is the lowest layer in the OSI model. It mainly performs photoelectric and electro-optical.