Geometrical separation between the birefringence components in Faraday-rotation fiber-optic current sensors.
A novel optical fiber current sensor for low-current measurements is proposed and tested. By winding a commonly used low-birefringence single-mode optical fiber in a special geometry, one can circumvent the bend-induced birefringence problem. Smaller sensors can now be built with a sensitivity that linearly increases with the number of fiber windings.
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Ben-Kish
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Tur
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Shafir