What does "trimming" refer to in fiber optic termination?

In the context of fiber optic termination, "trimming" specifically refers to the process of cutting and preparing the end of a fiber for connection. This step is crucial as it ensures that the fiber ends are properly shaped and sized to facilitate a strong and effective optical connection. If the fiber end is not trimmed accurately, it can lead to increased loss of signal or even total failure of the connection, as poorly trimmed fibers may not align correctly when connected.

During this process, the technician uses precision tools to achieve a flat and even end surface on the fiber. This preparation is essential before any termination method—whether using connectors or splicing—can be completed effectively. Proper trimming ensures that light can pass through the fiber without significant loss due to reflection or scattering, which is particularly critical in high-performance applications.