The simplest method: join two pre-terminated cables via a coupler (also called an adapter). The coupler aligns the two connector ferrules using a zirconia sleeve. Learn how to do fiber optic jointing and splicing step by step! This video covers all the tools, techniques, and tips for fiber optic splicing, fiber jointing, and making strong, reliable connections. This guide is useful for fibre technicians, students, and anyone interested in fib. Optical fibers can be joined together, such that light is efficiently transferred from one fiber to another. They are essential in establishing temporary or semi-permanent links in fiber optic networks.