Investment in a Fourier-optical fusion splicer makes sense this stark contrast to prospected customers. In the first place, due to the fusion splicer's quick heating time and rapid cooling process, work efficiency is greatly improved yet requires less expense. In the second place, splices made by precisely splicing two fibers together enhance network reliability because they are of uniform quality and every joint is perfect Thirdly, unlike mechanical splicing techniques fusion creates a permanent joint which is less affected by environmental factors. This increases the lifetime of networks. Lastly, many fusion splicers have such functions as automatic splice programs and calculation of the loss in splice length. This simplifies the splicing process and even inexperienced technicians can easily learn to use them. These advantages together constitute a powerful tool for the construction and maintenance of fiber optic networks.