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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 21 — Jul. 20, 2012
  • pp: 5119–5125

Single-crystal magneto-optic sensor with electrically adjustable sensitivity

Changsheng Li and Toshihiko Yoshino  »View Author Affiliations

Applied Optics, Vol. 51, Issue 21, pp. 5119-5125 (2012)

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A novel magneto-optic sensor with electrically adjustable sensitivity is proposed that is based on the approximate multiplication correlation between the linear electro-optic phase retardation and the Faraday magneto-optic rotation angle in a single bismuth germanate crystal. The measurement sensitivity and its temperature stability, linear and monotonic measurement ranges of the proposed sensor can be controlled in real time by adjusting the modulating voltage applied to the sensing crystal. In particular, the proposed sensor can be used for the precise measurement of dc magnetic field or dc current. The basic sensing performance is theoretically analyzed and experimentally demonstrated by dc current measurement.

© 2012 Optical Society of America

OCIS Codes
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(230.2240) Optical devices : Faraday effect
(230.4110) Optical devices : Modulators
(260.5430) Physical optics : Polarization

ToC Category:
Optical Devices

Original Manuscript: April 5, 2012
Revised Manuscript: June 9, 2012
Manuscript Accepted: June 14, 2012
Published: July 13, 2012

Changsheng Li and Toshihiko Yoshino, "Single-crystal magneto-optic sensor with electrically adjustable sensitivity," Appl. Opt. 51, 5119-5125 (2012)

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