| 摘要 |
PROBLEM TO BE SOLVED: To provide a furnace for drawing an optical fiber, in which the temperature distribution is uniform and the generation of disturbance in a gas stream is prevented; and to provide a method for drawing the optical fiber, by which the optical fiber having a uniform outer diameter can be manufactured. SOLUTION: The furnace 50 for drawing the optical fiber has a drawing chamber 8 into which a gas flows from an upper part. In the inner wall surface of the drawing chamber 8, a plurality of partition plates 7 for vertically partitioning the inside of the drawing chamber 8 and a plurality of locking parts 14 for locking the partition plates 7 are provided. Each partition plate 7 has a perforated hole through which a dummy rod 3 penetrates and ventilation holes through which the gas passes. An interval is provided between the partition plates so that the gas can pass through the ventilation holes. The method for drawing the optical fiber comprises using the furnace 50 for drawing the optical fiber, then partitioning the upper space of the drawing chamber 8 into a plurality of spaces by the partition plates 7, and drawing the optical fiber by heating and melting an optical fiber preform 10 supported by the dummy rod 3. COPYRIGHT: (C)2005,JPO&NCIPI |
