PRODUCTION OF OPTICAL FIBER AND APPARATUS FOR PRODUCTION THEREOF

摘要

PROBLEM TO BE SOLVED: To make it possible to produce an optical fiber which is small in PMD by giving rise to kink on the optical fiber while suppressing the movement of the optical fiber and preventing the change in the diameter of the optical fiber. SOLUTION: An optical fiber preform 1 is drawn to form the optical fiber 3 and a coating layer is formed around the optical fiber 3 to form an optical fiber 11. This optical fiber 11 is brought into contact with the peripheral surface of a turn pulley 9, by which a progression direction is changed. The turn pulley 9 is moved back and forth in the axial direction of rotation, by which the optical fiber 11 is rolled on the peripheral surface of the turn pulley 9 to give rise to the kink in the optical fiber 3.