Method for manufacturing optical fiber

Abstract

According to the present disclosure, provided is a method for manufacturing an optical fiber from a glass fiber obtained by heating and drawing an optical fiber preform, the method including: an application step of applying an ultraviolet-curable resin to the glass fiber; and a curing step of irradiating the ultraviolet-curable resin with ultraviolet light to cure the ultraviolet-curable resin. The curing step includes: a first irradiation step of irradiating the ultraviolet-curable resin with ultraviolet light from an ultraviolet LED as a light source; and a second irradiation step of irradiating the ultraviolet-curable resin with ultraviolet light from an ultraviolet lamp as a light source in this order. A surface temperature of the ultraviolet-curable resin at start of the second irradiation step is 300° C. or lower.

Dependencies are inferred from the claim text.