What does the term "fiber core" refer to?

The term "fiber core" specifically refers to the central part of a fiber optic cable that is designed to carry the light signals. This core is typically made of glass or plastic and is surrounded by a cladding layer that reflects the light back into the core, allowing for total internal reflection. This is crucial for the efficient transmission of data over long distances, as the core is where the actual light signal travels.

Understanding the role of the fiber core is fundamental for anyone involved in fiber optics, as it directly impacts the performance and capabilities of the fiber optic system. This makes the concepts of light propagation, transmission loss, and bandwidth intimately related to the properties of the fiber core.

The other choices pertain to different components of the fiber optic system. The outer layer of protection, for instance, refers to the protective coating or buffer that safeguards the fiber from physical damage, while the connectors at both ends are used for interfacing the fiber optic cable with other components. The reflective coating around the fiber is known as cladding, which serves to keep the light within the core. Each of these parts plays a vital role, but the core itself is central to the function of the fiber as it is the medium through which light is transmitted.