Abstract

A novel optical fiber current sensor for low-current measurements is proposed and tested. By winding a commonly 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.

© 1991 Optical Society of America

Miniature Faraday current sensor based on multiple critical angle reflections in a bulk-optic ring

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