Glass manufacturing – Fiber making apparatus – With crimping or curling means
Patent
1994-03-03
1996-02-20
Simmons, David A.
Glass manufacturing
Fiber making apparatus
With crimping or curling means
65508, 6537413, C03B 2502, G02B 6787
Patent
active
054925525
ABSTRACT:
A holder for annealing a fiber optic coil uses a silica ring on a silica substrate, or silica tubular coil, either of which may be directly incorporated into a coil subassembly for a Faraday-effect current sensor. The ring may be formed in a silica plate by sandblasting or grinding, or formed separately and adhered to the plate. In the tubular holder embodiment, silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.
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Cronk Bryon J.
Lutz Dale R.
MacDougall Trevor W.
Griswold Gary L.
Hoffman John
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Musgrove Jack V.
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