A mechanical splicer is a junction of two or more optical fibers that are arranged and held in place by a self-contained assembly (usually the size of a large carpenter's nail). The fibers aren't permanently joined, just precisely held together so that light can pass from to another.There are some significant advantages of using mechanical fiber splicer  than fusion splices. First of all, mechanical splicers require no power supplies and it designs require no extra tools beyond a fiber stripper and fiber cleaver. What’s more, they can be used in situations where blend splicing is not practical or impossible.Mechanical splices  also can come in within a minute or two; this makes it ideal for temporary connectionsOf course, fiber optic mechanical splicers have their cons too. For example, it’s higher attachment loss. The common attachment loss for a mechanical splice is about 0. 2dB which is significantly higher than the 0. 02dB loss for a typical fusion splice. Mechanical splicers are typically for multimode fibers. The tough positioning ceiling for single mode fibers makes it hard for mechanical splices to meet. In addition, mechanical splicer is more expensive than fusion splices. But if you look at the expensive fusion splicing machines  that blend splices need, the average cost is actually dramatically reduced for mechanical splice if you just execute a few splices. Since the refractive listing on most indexes matching compounds varies with temperature, so the optical performance of a mechanical splice  can be sensitive to background temperature.Mechanical splices are not viewed as as reliable as fusion splices  over long periods of time and they are used only in relatively benign environments such as inside an office building.

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