Optical connectors are used to connect optical fibers. The fiber is fixed within the center of the ferrule, at the tip of the optical connector; by inserting the ferrule into the sleeve within the adapter, the optical fibers are aligned and connected with great. Selection of a ferrule material should not be based on cost alone, but on a combination of relevant performance factors that include durability of ferrule materials, connector mating frequency, and ability of each material to retain endface geometry and surface finish over time. Where be used? Ferrule is the most important component of Fiber Connectors and Fiber Patch cord. Yet when so many connectors are being manufactured overseas to different standards, how can you have confidence in the connectors you are using? The best place to start is at the. A ferrule's job is to hold the fiber core in perfect concentric alignment while maintaining extremely tight tolerances according to IEC 61755, IEC 61300, and GR-326 requirements.