Patent ID: 6866428
Filing Date: 2005-03-15
Classification: G02B

Abstract:
1. A method for connecting optical fibers comprising the steps of: producing a connection line in which a fusion-spliced portion is formed by fusion-splicing end faces of optical fibers of different kinds each having a different mode field diameter; producing a dummy connection line in which a dummy fusion-spliced portion is formed by fusion-splicing end faces of dummy optical fibers of different kinds which are of the same kind as said optical fibers of different kinds; arranging the fusion-spliced portion of said connection line and the fusion-spliced portion of said dummy connection line in parallel, and applying heat treatment to said fusion spliced portion and said dummy fusion-spliced portion under the same heating conditions while measuring only connection loss in said dummy fusion-spliced portion; and finishing said heat treatment at the time when a measured value of the connection loss in said dummy fusion-spliced portion is equal to or less than a preset target value.