Ceramic offers the best dimensional control and durability when precision ground to the correct size; furthermore, its environmental stability provides long-term performance advantages. Ceramic also bonds well with glass components, making it the ideal material choice for. Ceramic ferrules and sleeves are often used in optical connectors, attenuators, fiber stubs, and other optoelectronics requiring low signal loss. This typically takes the form of cylindrical structures with holes at their centers for secure alignment. 1 cabling architecture standards. Where be used? Ferrule is the most important component of Fiber Connectors and Fiber Patch cord.