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Optics Letters

Optics Letters


  • Vol. 12, Iss. 4 — Apr. 1, 1987
  • pp: 293–295

Alternating-current measurement and noninvasive data ring utilizing the Faraday effect in a closed-loop fiber magnetometer

M. Berwick, J. D. C. Jones, and D. A. Jackson  »View Author Affiliations

Optics Letters, Vol. 12, Issue 4, pp. 293-295 (1987)

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A novel fiber-optic polarimetric configuration for a magnetometer utilizing the Faraday effect is described. The system is operated in a closed-loop mode using magneto-optic feedback through a simple current-driven solenoid to maintain the azimuth of the optical output from the polarimeter constant. In this mode of operation scale-factor errors due to changes in the Verdet constant of the fiber are effectively eliminated. The minimum detectable current was less than 1 mA, with linear operation up to several amperes. A multiplexed system was also demonstrated, with potential application as a multiaccess noninvasive data ring.

© 1987 Optical Society of America

Original Manuscript: June 24, 1986
Manuscript Accepted: January 14, 1987
Published: April 1, 1987

M. Berwick, J. D. C. Jones, and D. A. Jackson, "Alternating-current measurement and noninvasive data ring utilizing the Faraday effect in a closed-loop fiber magnetometer," Opt. Lett. 12, 293-295 (1987)

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