Drawing method of optical fiber and drawing furnace
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United States of America Patent
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Jun 21, 2005
Grant Date -
Nov 28, 2002
app pub date -
Feb 20, 2002
filing date -
Feb 21, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The drawing method of the present invention uses a drawing furnace comprising a furnace muffle tube, a furnace body and a heater. According to the method, an optical fiber preform is inserted from the inlet of the furnace muffle tube, the optical fiber preform is melted by means of a heater, under a specified gas atmosphere, and is drawn toward the outlet of the furnace muffle tube by means of a specified drawing tension. The optical fiber preform and the drawing furnace used in this method both satisfy the condition of below-indicated formula (1):
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