Co-directional stream effect in fiber optic cables with regular heterogeneities

In this paper it was received an expression for definition the co-directional stream in optical fiber cables which caused by reflection from heterogeneities of joints, taking into consideration the reduction of modes amplitudes that caused by reflection. Also it was calculated and analyzed the co-directional stream for equivalent cable section length depending on the number of heterogeneities. the signal security from co-directional stream effect for different lengths of cable section was calculated.