The core function of optical modules precisely fills this gap, acting as a "bridge" connecting switches and fiber optic networks, specifically undertaking the task of photoelectric signal conversion: the transmitting end converts the electrical signals output by the switch into. The core function of optical modules precisely fills this gap, acting as a "bridge" connecting switches and fiber optic networks, specifically undertaking the task of photoelectric signal conversion: the transmitting end converts the electrical signals output by the switch into. Optical switching represents a fundamental technological evolution, shifting data routing from the domain of electrons to the realm of photons, or light. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. An. Optical modules and switches, as core network hardware, form a closely interdependent and symbiotic relationship—optical modules are the "extension arms" of switches that overcome transmission limitations, while switches are the "command center" for optical modules to function. Thin-film filter and PLC based AWG for multiplexing, a full suite of components for optical amplification use, optomechanical or MEMS-based switches for protection or surveillance application, Tap PD for power monitoring and VOA for.