, core size, core-to-clad concentricity, core and cladding non-circularity, numerical aperture, etc. Splicing is required to create a continuous path for light transmission from one fiber to another. Two different methods exist for splicing fibers: Typical splice loss values (the measure of loss in optical power across the splice point) are usually lower for fusion splices (typically less than 0. To be able to judge whether a fiber optic cable plant is good, one does a insertion loss test with a light source and power meter and compares that to an estimate of what is a reasonable loss for that cable plant. The next step of aligning the fiber end (to be jointed) is very crucial because any kind of misali nment would lead to a transmission loss. Extrinsic factors, such as the presence of microbends, are those that are external to the fiber. Core diameter mismatch is a type of extrinsic factor that can cause significant loss in a splice. Typical mechanical splices for multimode fiber are easy to install and require few specialized installation tools.
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