Fiber optic, Faraday rotation current sensor

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At the Second Megagauss Conference in 1979, there were reports of experiments that used the Faraday magneto-optic effect in a glass rod to measure large electric current pulses or magnetic fields. Since then we have seen the development of single-mode optical fibers that can carry polarized light in a closed loop around a current load. A fiber optic Faraday rotation sensor will integrate the flux, instead of sampling it at a discrete point, to get a measurement independent of the current distribution. Early Faraday rotation experiments using optical fibers to measure currents dealt with problems such as fiber birefringence and ... continued below

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Pages: 9

Creation Information

Veeser, L.R. & Day, G.W. January 1, 1986.

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Description

At the Second Megagauss Conference in 1979, there were reports of experiments that used the Faraday magneto-optic effect in a glass rod to measure large electric current pulses or magnetic fields. Since then we have seen the development of single-mode optical fibers that can carry polarized light in a closed loop around a current load. A fiber optic Faraday rotation sensor will integrate the flux, instead of sampling it at a discrete point, to get a measurement independent of the current distribution. Early Faraday rotation experiments using optical fibers to measure currents dealt with problems such as fiber birefringence and difficulties in launching light into the tiny fiber cores. We have built on those experiments, working to reduce the effects of shocks and obtaining higher bandwidths, absolute calibration, and computerized recording and data analysis, to develop the Faraday rotation sensors into a routine current diagnostic. For large current pulses we find reduced sensitivity to electromagnetic interference and other backgrounds than for Rogowski loops; often the fiber optic sensors are useful where conductive probes cannot be used at all. In this paper we describe the fiber optic sensors and some practical matters involved in fielding them.

Physical Description

Pages: 9

Notes

NTIS, PC A02/MF A01.

Source

  • 4. international conference on megagauss magnetic-field generation and related topics, Santa Fe, NM, USA, 14 Jul 1986

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  • Other: DE86012413
  • Report No.: LA-UR-86-2084
  • Report No.: CONF-860703-2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5746103
  • Archival Resource Key: ark:/67531/metadc1098038

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1986

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • June 4, 2018, 1:38 p.m.

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Veeser, L.R. & Day, G.W. Fiber optic, Faraday rotation current sensor, article, January 1, 1986; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1098038/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.