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Proceedings Paper

Magnetic field sensing using D-fiber coupled Bi:RIG slab
Author(s): Bryson Shreeve; Richard Selfridge; Stephen Schultz; Celestino Gaeta; Richard Forber
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Paper Abstract

Ultra small magnetic field sensors are created using magneto-optic slab waveguides coupled to optical fiber. The magneto-optic material used is bismuth-doped rare earth iron garnet (Bi:RIG). By etching close to the core of D-type optical fiber and attaching a magneto-optic material, light transfers from the fiber to the slab waveguide at specific wavelengths. The wavelengths that couple depend on the refractive index of the slab that changes in the presence of a magnetic field. When a field is applied, the wavelength coupling shifts and a resulting change in power can be detected. The sensors reported in this paper detect magnetic fields as low as 11 A/m.

Paper Details

Date Published: 17 May 2011
PDF: 4 pages
Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77534S (17 May 2011); doi: 10.1117/12.885136
Show Author Affiliations
Bryson Shreeve, Brigham Young Univ. (United States)
Richard Selfridge, Brigham Young Univ. (United States)
Stephen Schultz, Brigham Young Univ. (United States)
Celestino Gaeta, IPITEK, Inc. (United States)
Richard Forber, IPITEK, Inc. (United States)


Published in SPIE Proceedings Vol. 7753:
21st International Conference on Optical Fiber Sensors
Jacques Albert; Wojtek J. Bock, Editor(s)

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