Polarization preserving optical fiber and method of manufacturing
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United States of America Patent
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Feb 27, 1990
Issued Date -
N/A
app pub date -
Jan 23, 1989
filing date -
Apr 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved polarization preserving birefringent fiber optic member is provided having cross-sectional circular cladding and core members of soft glasses. A metallic coating of an approximately circular configuration, that is offset from the axis of the core and cladding members, is provided with sufficient thickness to provide an anisotropic variation in compressional strain on the core member to create the anisotropy of the refracted index of the core member for preserving polarization characteristics. The optical fiber can be formed by heating a mechanical composite of a core rod and cladding tube, drawing the core and cladding to form a fused fiber and transporting the drawn fiber through a coating bath to provide the variation in thickness.
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