Patent ID: 9650283
Date: 2017-05-16
CPC Classifications: B65H,C03B,C03C,G02B,Y02P

Claim:
1. A method of manufacturing an optical fiber, comprising: drawing an optical fiber preform and forming a bare optical fiber; disposing a coating layer formed of a resin on an outer circumference of the bare optical fiber; and curing the coating layer and obtaining an optical fiber, wherein: a direction of the bare optical fiber is changed by a direction changer in any position from drawing the optical fiber to disposing the coating layer; the direction changer includes a guide groove which guides the bare optical fiber; a blowout port of a fluid which floats the bare optical fiber wired along the guide groove is formed along the guide groove in the guide groove; when a direction of the bare optical fiber is changed by the direction changer, the fluid is introduced into the guide groove from the blowout port and the bare optical fiber is floated and a Reynolds number of the fluid is in a range of 1200-3500; and the Reynolds number in an inlet wire portion of the bare optical fiber to the guide groove and an outlet wire portion from the guide groove is greater than the Reynolds number in an intermediate portion between the inlet wire portion and the outlet wire portion.