Method of assembling a fiber optic preform from discrete preformed elements
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United States of America Patent
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Dec 18, 1990
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N/A
app pub date -
Dec 7, 1989
filing date -
Dec 9, 1988
priority date (Note) -
Expired
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Abstract
A method of providing a preform for a polarization-maintaining optical fiber, starting from a basic preform (1) having two orthogonal planes of symmetry intersecting along its axis, and mechanically applying two discrete preformed oblong elements (15) of silica doped with boron oxide on the outside face of said basic preform symmetrically about the first plane (20), and two oblong elements of silica doped with titanium oxide on the outside face of said basic preform and symmetrically about the second plane (30). The shapes of the basic preform and the four oblong elements are selected to define a substantially solid cylinder.
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