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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 10 — Apr. 1, 1995
  • pp: 1692–1696

Current sensing using bismuth rare-earth iron garnet films

Michael Ko and Elsa Garmire  »View Author Affiliations


Applied Optics, Vol. 34, Issue 10, pp. 1692-1696 (1995)
http://dx.doi.org/10.1364/AO.34.001692


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Abstract

Ferrimagnetic iron garnet films are investigated as current-sensing elements. The Faraday effect within the films permits measurement of the magnetic field or current by a simple polarimetric technique. Polarized diffraction patterns from the films have been observed that arise from the presence of magnetic domains in the films. A physical model for the diffraction is discussed, and results from a mathematical analysis are in good agreement with the experimental observations. A method of current sensing that uses this polarized diffraction is demonstrated.

© 1995 Optical Society of America

History
Original Manuscript: June 8, 1994
Revised Manuscript: August 30, 1994
Published: April 1, 1995

Citation
Michael Ko and Elsa Garmire, "Current sensing using bismuth rare-earth iron garnet films," Appl. Opt. 34, 1692-1696 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-10-1692


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References

  1. M. N. Deeter, A. H. Rose, G. W. Day, “Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG” IEEE J. Lightwave Technol. 8, 1838–1842 (1990). [CrossRef]
  2. The samples were kindly supplied by S. Licht of AT&T Bell Laboratories, Murray Hill, NJ 07974.
  3. J. A. Davis, J. M. Waas, “Current status of the magneto-optic spatial light modulator,” in Spatial Light Modulators and Applications III, U. Efron, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1150, 334–345 (1989).
  4. M. Waring, “Polarized beam splitting effect in heterogeneously magnetized magneto-optic films,” in Optical Information Processing Systems and Architecture, B. Javidi, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1151, 567–576 (1989).
  5. R. Wolfe, E. M. Gyorgy, R. A. Lieberman, V. J. Fratello, S. J. Licht, M. N. Deeter, G. W. Day, “High frequency magnetic field sensors based on the Faraday effect in garnet thick films,” in Proceedings of the IEEE 8th Optical Fiber Sensors Conference (Institute of Electrical and Electronics Engineers, New York, 1992), pp. 390–392. [CrossRef]

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