EQUIPMENT FOR MANUFACTURING COATED OPTICAL FIBER AND METHOD FOR MANUFACTURING COATED OPTICAL FIBER

摘要

The present invention relates to an apparatus and method of producing coated optical fiber in which polarization mode dispersion is sufficiently reduced by providing a sufficient amount of twist thereto. An upstream twisting inhibiting roller (11), a twist non-inhibiting roller (12), a twist provider (13) and a downstream twist inhibiting roller (14) are provided in this order along the path line of a coated optical fiber (1). The twist provider (13) provides the twist to the coated optical fiber (1). The upstream twist inhibiting roller (11) and the downstream twist inhibiting roller (14) respectively inhibit a rotation of the coated optical fiber (1) around the axis of the coated optical fiber (1). The twist non-inhibiting roller (12) functions so as to adjust the path line length of the coated optical fiber (1) located between the upstream twist inhibiting roller (11) and the twist provider (13), and does not inhibit the rotation of the coated optical fiber (1) around the axis of the coated optical fiber (1).