| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber preform for an optical component which can be manufactured easily, where its outside diameter is uniform to a longitudinal direction and its core diameter changes gradually and which has a desired property and to provide an optical fiber. SOLUTION: After a quartz-based glass rod 3 where the diameters of a core part 1 and a clad part 2 are uniform to the longitudinal direction is heated, lengthened and shaped for a tapered glass rod 4 whose diameter is shortened gradually, the optical fiber preform 5 for the optical component having a uniform outside diameter to the longitudinal direction is obtained by cutting its periphery. The tapered glass rod 4 whose diameter is shortened gradually is favorably heat-treated in a flame or an electric furnace before cutting the periphery. Processing or treating may be performed with a glass lathe. COPYRIGHT: (C)2006,JPO&NCIPI |
