Patent ID: 8033141

Claim:
A method of manufacturing an optical fiber, comprising: drawing an optical fiber from a melted tip of an optical-fiber preform; forming a coated optical fiber by applying a coating on an outer circumference of the optical fiber drawn at the drawing; and applying a glass spin to the coated optical fiber by gripping the coated optical fiber with at least a pair of spinning applying rollers with parallel rotation axes across the coated optical fiber, wherein the pair of spinning applying rollers are arranged at different levels relative to each other in a first direction that the optical fiber is guided in, rotating the spinning applying rollers so that the coated optical fiber is guided in the first direction; and alternately shifting the spinning applying rollers in directions opposite to each other along the rotation axes, wherein the applying includes applying the glass spin to the coated optical fiber in a state in which each of the rotation axes is tilted at a predetermined angle from a plane perpendicular to the first direction.