Among them, Fiber Optic Connectors are the "small connectors" at both ends of the optical fiber, equivalent to the "messengers" of communication signals, responsible for capturing and transmitting optical signals; while the flange, which we call Optical Fiber Adapter . Among them, Fiber Optic Connectors are the "small connectors" at both ends of the optical fiber, equivalent to the "messengers" of communication signals, responsible for capturing and transmitting optical signals; while the flange, which we call Optical Fiber Adapter . 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. Instead, it defines how the adapter is positioned, retained, and constrained within a panel or enclosure. 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.