Optical fiber coupler, manufacturing method and apparatus thereof
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United States of America Patent
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-
Jul 8, 2003
Grant Date -
Sep 5, 2002
app pub date -
Mar 29, 2001
filing date -
Mar 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical fiber coupler according to the present invention comprises two optical fibers which each include a core portion serving to propagate light and a clad portion surrounding said core portion, the two optical fibers extending substantially in parallel in a same flat plane, and a melting portion in which the clad portions of the two optical fibers are fused together substantially in a line contact. Two optical fibers are arranged in parallel to permit at least parts of the clad portions to be brought into contact with each other. In this state, the two optical fibers are heated and fused mutually substantially in a line contact and are further drawn for fabrication thereof. The optical fibers are heated preferably employing an electric ceramic microheater. The two optical fibers may be same or different in structural parameters.
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