The connector ferrule can be made of which three materials?

The connector ferrule is a critical component in fiber optic connectors, as it holds the optical fiber in place and aligns it for optimal performance. The correct materials from which a ferrule can be made include ceramic, plastic, and steel.

Ceramic is highly favored for its durability, low thermal expansion, and ability to maintain precise dimensions, making it ideal for ensuring low insertion loss in connections. Plastic ferrules are commonly used in lower-cost connectors or in applications where lightweight and ease of manufacturing are priorities. Steel is utilized in some types of ferrules for its strength and reliability in mechanical structure.

In contrast, other materials like aluminum, rubber, copper, magnesium, brass, and titanium do not typically offer the appropriate thermal stability, mechanical strength, or precision needed for effective optical coupling in fiber optic connectors. Thus, while they might be used in different contexts, they are not standard materials for ferrules in fiber optic applications.