Directional coupler utilizing biconically tapered optical fibers and a method of making same
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United States of America Patent
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Oct 25, 1988
Grant Date -
N/A
app pub date -
Jul 24, 1986
filing date -
Jul 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fiber optic directional coupler comprising a pair of strands of single mode optical fiber having biconical tapers whereby the electromagnetic field within the fibers extend virtually to the cladding outside surface, the strands in the region of the tapers being bent in opposite directions and positioned with their cladding in contact over a length of the waist of the tapers, the cladding in contact being narrowed on one side, flat, and polished, whereby the field is coupled from one strand to the other.
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