Abstract

We describe a current sensor that uses the Faraday effect in two square rings of glass capable of measuring two independent currents simultaneously with a resolution of $1.2\hspace{0.17em}\text{A}/\sqrt{\text{Hz}}$. Pseudoheterodyne signal processing is used to recover the phase modulation produced by the Faraday effect.

© 1991 Optical Society of America

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

Y. N. Ning, B. C. B. Chu, and D. A. Jackson
Opt. Lett. 16(24) 1996-1998 (1991)

Faraday current sensor that uses a triangular-shaped bulk-optic sensing element

B. C. B. Chu, Y. N. Ning, and D. A. Jackson
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Geometrical separation between the birefringence components in Faraday-rotation fiber-optic current sensors

A. Ben-Kish, M. Tur, and E. Shafir
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Current measurement by Faraday effect on GEPOPU

Noemí Correa, Hernán Chuaqui, Edmund Wyndham, Felipe Veloso, Julio Valenzuela, Mario Favre, and Heman Bhuyan
Appl. Opt. 51(6) 758-762 (2012)

Faraday effect current sensor with improved sensitivity–bandwidth product

K. B. Rochford, A. H. Rose, M. N. Deeter, and G. W. Day
Opt. Lett. 19(22) 1903-1905 (1994)