Method for manufacturing optical fiber and the cooling of the optical fiber
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jan 5, 2006
app pub date -
Jun 20, 2005
filing date -
Apr 9, 2004
priority date (Note) -
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Abstract
A method for manufacturing an optical fiber by drawing an optical fiber preform softened by heating, includes cooling the optical fiber at a cooling rate of not more than 4000° C. per second at a temperature of 1200 to 1400° C. of the optical fiber; and cooling the optical fiber at a cooling rate of not more than 8000° C. per second at a temperature of 850 to 1200° C. of the optical fiber. A drawing rate of the optical fiber is not less than 1000 meters per minute.
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