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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 29, Iss. 18 — Sep. 15, 2004
  • pp: 2115–2117

Fiber-optic extrinsic Fabry-Perot dc magnetic field sensor

Ki D. Oh, Anbo Wang, and Richard O. Claus  »View Author Affiliations


Optics Letters, Vol. 29, Issue 18, pp. 2115-2117 (2004)
http://dx.doi.org/10.1364/OL.29.002115


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Abstract

We demonstrate a compact extrinsic Fabry–Perot interferometer-based fiber-optic sensor that uses magnetostrictive amorphous metallic wire Unitika AF-10 (Fe77.5B15Si7.5) as a sensor gauge for measuring dc magnetic fields. We present a theoretical model based on a Gaussian electric field distribution to analyze the sensor operation as a function of longitudinal air-gap separation. The model shows good agreement with the experimental results. A resolution of 50 nT over a range of 50–40,000 nT with a simple passive temperature-compensation method is obtained.

© 2004 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry

Citation
Ki D. Oh, Anbo Wang, and Richard O. Claus, "Fiber-optic extrinsic Fabry-Perot dc magnetic field sensor," Opt. Lett. 29, 2115-2117 (2004)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-29-18-2115

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