Fiber Optic Adapter refers to an adapter used for fiber optic connections, primarily for converting between different types of fiber optic connections. It ensures that different devices or different types of fiber optic interfaces can be connected smoothly, ensuring the quality and stability of signal transmission. It is divided into single-mode and multi-mode adapters. It is also divided into adapters for different connectors such as FC, SC, LC, ST, MPO, etc. High-quality adapters maintain low insertion loss and return loss.