Faraday effect sensors for magnetic field and electric current

Gordon W. Day; Merritt N. Deeter; Allen H. Rose; Kent B. Rochford

doi:10.1117/12.195528

30 November 1994 Faraday effect sensors for magnetic field and electric current

Gordon W. Day, Merritt N. Deeter, Allen H. Rose, Kent B. Rochford

Proceedings Volume 2341, Interferometry '94: Interferometric Fiber Sensing; (1994) https://doi.org/10.1117/12.195528
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

Abstract

Recent research at NIST has greatly extended the capabilities of Faraday effect sensors for both magnetic field and electric current measurements. Current sensors using single-mode optical fiber show temperature stability near material limits, and are approaching commercial availability for applications in the power industry. The Faraday effect in iron garnets shows great promise for measureing current at low levels and/or high speeds. Sensors with noise equivalent currents of about 200 nA/(root)Hz have been demonstrated. Magnetic field sensors using iron garnets and flux concentration, have led to sensors with noise equivalent magnetic fields in the range of 1 pT/(root)Hz.

Citation Download Citation

Gordon W. Day, Merritt N. Deeter, Allen H. Rose, and Kent B. Rochford "Faraday effect sensors for magnetic field and electric current", Proc. SPIE 2341, Interferometry '94: Interferometric Fiber Sensing, (30 November 1994); https://doi.org/10.1117/12.195528

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