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. The transmitted optical power is related to the proportion of "1"s in the transmitted data signal; the more "1"s, the. 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 transceiver modules, and optical forwarding modules.