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Opt Lett. 1991 Jun 15;16(12):955-7.

Dual-channel Faraday-effect current sensor capable of simultaneous measurement of two independent currents.

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 A radicalHz. Pseudoheterodyne signal processing is used to recover the phase modulation produced by the Faraday effect.

PMID:
19776841

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