OPTICAL FIBER DRAWING METHOD AND DRAWING FURNACE

摘要

An optical fiber drawing method comprises the steps of heating an optical fiber preform (13) starting at one end thereof to soften the same, and drawing an optical fiber (14), wherein the optical fiber preform (13) is received in a semi-sealed space (10, 20) partly opened at the lower end thereof within a drawing furnace and is heated by a heater (15) installed on the lower end of the semi-sealed space (10, 20) while drawing is performed with the amount of heat radiation from the upper region (20) of the semi-sealed space regulated.