Method of splicing optical fibers and multi-fiber component

摘要

Provided are a method of splicing together multiple fibers having different mode field diameters (MFDs) en bloc at a low splicing loss and a multi-fiber component incorporating the fibers thus spliced. After a fusion-splicing operation has been conducted, additional heat treatment is applied to the portion of the fibers thus fusion-spliced so that a dopant contained in the core portions of the fibers is thermally diffused so as to cause the MFDs thereof to match each other. The multiple fibers are disposed in parallel in line. During the fusion-splicing operation, one or both of pairs of fibers (11a and 11b) are pushed toward the other to face each other, and the fibers are pulled back in the opposite direction to decrease diameter increment created in fusion spliced portions, and then additional heat treatment by electric heater or gas burner (19) is applied to the fusion-spliced portions (16), at the TEC treatment region (20). <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE>