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Investigation results of optical fiber fusion splice reflections on Volga-region long-haul transmission lines

During realization of plan-prophylactic operations on fiber- optical transmission line (FOTL) at reflectometric measurements, with small duration of outgoing pulse, in a number of optical fiber fusion splicers the inhomogeneities as signals of return reflection were detected by one of the telecommunication operators in Volga region. In paper the results of a research the detected inhomogeneities with the help of full-scale measurements carried out during 1999 - 2000(Gamma) (Gamma) are given. The reasons, which could lead to appearance of return reflection signals on fusion splices, are analyzed, the recommendations on detection such fusion splices are made and the work package preventing appearance of fusion splices with reflections at a stage of FOTL building is offered.