OPTICAL FIBER TWISTING DEVICE, METHOD OF MANUFACTURING OPTICAL FIBER, AND OPTICAL FIBER

摘要

An optical fiber twisting apparatus that makes it possible to prevent the occurrence of line distortion in an optical fiber as it is undergoing a drawing process and to provide a consistent coating on a bare optical fiber. This optical fiber twisting apparatus is provided with a twist roller apparatus that includes a twist roller that, by imparting a twist to an optical fiber, imparts a twist to a molten portion of an optical fiber preform that is positioned on an upstream side of the optical fiber; and a support portion that supports the twist roller. The accuracy of the outer circumference of the twist roller when the twist roller is forming a part of the twist roller apparatus is 15 µm or less.