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

摘要

An optical fiber twisting device capable of stably covering a bare optical fiber by preventing the optical fiber from being swung during drawing. The optical fiber twisting device comprises a twisting roller (22) twisting the molten portion of an optical fiber base metal positioned on the upstream side of the optical fiber by adding twist to the optical fiber and a support part (21) pivotally supporting the twisting roller (22). The accuracy of the outer peripheral part of the twisting roller (22) in the state of forming a twisting roller device (25) is 15 mum or less.