What method is used to create a permanent joint between the ends of two fibers?

The creation of a permanent joint between the ends of two fibers is achieved through a method called splicing. Splicing involves aligning the ends of the optical fibers and then fusing them together either through a mechanical or fusion splice technique. This process ensures that the light can pass through the joined fibers with minimal loss, maintaining the integrity of the signal being transmitted.

In contrast, welding typically refers to fusing metals at high temperatures, which is not applicable to optical fibers. Crimping involves securing connectors to cables but does not create a direct joint between the fiber ends themselves. Soldering is used primarily for connecting electronic components with metal conductors and is therefore not suitable for fiber optics. Splicing is recognized as the standard procedure for achieving a reliable and efficient connection in fiber optic installations.