| 摘要 |
PURPOSE:To produce a multicore optical fiber with twists of good optical transmission efficiency and good bending strength with good efficiency by such construction wherein the top ends of plural base materials are fixed by means of plural base material chucks mounted to the bottom surface of a common chuck rotated within a horizontal plane and drawn optical fibers are twisted. CONSTITUTION:Base materials 3 are mounted to plural base material chucks 2 mounted to the bottom surface of a common chuck 1 rotated within a horizontal plane, and the leading end parts thereof are heated and drawn in an electric heating oven 4. Drawn plural optical fibers 5 are passed through the holes in prescribed positions of a comber board 6 rotated synchronously with the chuck 1, then through the inside of a precoating material 9 in a precoating cup 7, and are combined and twisted together by means of a precoating die 8, after which the fibers are wound with a take-up device. Thereby, the multicore optical fiber with twists of good optical transmission efficiency and bending strength is produced efficiently. |
