Optical fiber coupler (Coupler), also known as splitter (Splitter), connector, adapter, flange, is an electrical-optical-electrical conversion device that transmits electrical signals with light as a medium, and is used to realize optical signal split/combination. It belongs to the field of optical. Fiber optic adapter (also known as flange), also called fiber optic connector, is a centering connection component of fiber optic active connector. A flange is a physical shoulder integrated into the adapter housing. Its function is to create a hard stop against the panel surface, limiting axial movement during installation and service. The device allows the transmission of light waves through multiple paths. Fiber optic couplers can either be passive or.