Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1994-03-03
1995-10-31
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
385 2, 324752, G01R 104
Patent
active
054633125
ABSTRACT:
A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.
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"Annealing of Bend-Induced Birefringence in Fiber Current Sensors" By G. W. Day and S. M. Etzel, Electromagnetic Technolgoy Division, National Bureau of Standards, Boulder, Colo. 80303, U.S.A., IOOC-ECOC '85-871.
"Faraday Effect Sensors" The State of the Art by G. W. Day and A. H. Rose, National Bureau of Standards, Boulder, Colo. 80303.
Lutz Dale R.
MacDougall Trevor W.
Taylor William L.
Varner Wayne F.
Wandmacher Robert A.
Bowser Barry C.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Musgrove Jack V.
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