Faraday-effect sensors for magnetic field and electric current

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

doi:10.1117/12.191859

1 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 2292, Fiber Optic and Laser Sensors XII; (1994) https://doi.org/10.1117/12.191859
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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 application in the power industry. The Faraday effect in iron garnets shows great promise for measuring 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 2292, Fiber Optic and Laser Sensors XII, (1 November 1994); https://doi.org/10.1117/12.191859

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