At the heart of every optical transceiver lie three essential components, often called the “Three Pillars” of optical communication: Laser — generates light. Modulator — encodes data onto the light. The working principle of optical modules is illustrated in the diagram shown in the Optical Module Working Principle Diagram. Subsequently, the driver semiconductor laser. 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. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa.