Optical fiber terminations are the mechanical and optical interfaces that connect fiber cables to equipment, patch panels, and network hardware. This guide will walk you through the most common fiber connector types, explaining their characteristics, advantages, and typical use cases. Mainstream Fiber Connectors Types and Applications Definition: MPO connectors are high-density, multi-fiber connectors designed to accommodate. An optical fiber connector is used to join optical fibers where a connect/disconnect capability is required. They directly affect insertion loss, return loss, reliability, and long-term network stability.