Optical modules are compact devices that convert electrical signals into optical signals and vice versa. They are used in fiber optic communication systems to transmit data over long distances with minimal loss and interference. Composition of Optical Modules The optical module, known as Optical Transceiver in English, is a general term for various module categories, including optical receiver modules, optical transmitter modules, optical. Optical modules are pivotal components in optical fiber communication systems, operating at the physical layer—the foundational level of the OSI model.