Tellurite optical fiber and production method thereof
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jan 19, 2006
app pub date -
Aug 12, 2004
filing date -
Aug 13, 2003
priority date (Note) -
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Abstract
A fabrication method of an optical fiber using as a core material tellurite glass. The method includes a first process of molding a tellurite glass melt into a mold, the mold having a plurality of convex portions defining an inner wall, which portions run parallel to each other in a longitudinal direction in order to make a polygon columnar glass preform, and a second process of inserting the glass preform into a cylindrical jacket tube made of tellurite glass and carrying out fiber-drawing under pressure so as to maintain or enlarge air holes which are gaps generated between the glass preform and the jacket tube.
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