| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber preform which is small in non-circular ratio and eccentricity and which enables manufacturing of an optical fiber having a superior polarized wave mode dispersibility, and also to provide a method of manufacturing the preform. SOLUTION: First, reduced diameter parts 11a, 11b are formed near both ends of a glass pipe 11. Second, a glass rod 12 is inserted into the glass pipe 11 having the reduced diameter parts 11a, 11b. Then, at the reduced diameter part 11a, the glass rod 12 is fixed against the glass pipe 11. After that, while a heat source 27 is moved in the direction from the reduced diameter part 11b to the reduced diameter part 11a, the glass pipe 11 and the glass rod 12 are heated and integrated, so that the optical fiber preform 10 is manufactured. |
