Method for manufacturing optical fiber
Provided is a method for manufacturing an optical fiber, the transmission loss of which can be easily reduced, said method comprising: a drawing step P1 in which one end of an optical fiber parent material 1P is drawn in a drawing furnace 110; and an annealing step P3 in which the optical fiber that...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | Provided is a method for manufacturing an optical fiber, the transmission loss of which can be easily reduced, said method comprising: a drawing step P1 in which one end of an optical fiber parent material 1P is drawn in a drawing furnace 110; and an annealing step P3 in which the optical fiber that was drawn in the drawing step P1 is annealed in an annealing furnace 121. The temperature of the optical fiber entering the annealing furnace 121 is greater than or equal to 1300 DEG C and less than or equal to 1650 DEG C, and the temperature of the optical fiber exiting from the annealing furnace 121 is greater than or equal to 1150 DEG C and less than 1400 DEG C.
本发明提供光纤的制造方法，具备：在拉丝炉(110)中将光纤用母材(1P)的端拉丝的拉丝工序(P1)；使在拉丝工序(P1)中被拉出后的光纤在缓慢冷却炉(121)中缓慢冷却的缓慢冷却工序(P3)；向缓慢冷却炉(121)进入的光纤的温度为1300℃以上且1650℃以下，从缓慢冷却炉(121)出来的光纤的温度为1150℃以上且低于1400℃，从而能够容易减少光纤的传输损失。 |
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