Magneto-optic current sensing with birefringent fibers
- 1 June 1979
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 34 (11) , 768-770
- https://doi.org/10.1063/1.90667
Abstract
To measure currents on high‐voltage lines, the Faraday rotation is used in a single‐mode optical fiber encircling the conductor. Disturbing linear birefringence is suppressed by twisting the fiber. With ∼10 m of fiber, coiled with a 3‐cm radius, we obtain 0.25 mrad/A polarization rotation, permitting measurement of currents of 0.2–2000 A.Keywords
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