Magnetic field sensing using D-fiber coupled Bi:RIG slab

Bryson Shreeve; Richard Selfridge; Stephen Schultz; Celestino Gaeta; Richard Forber

doi:10.1117/12.885136

17 May 2011 Magnetic field sensing using D-fiber coupled Bi:RIG slab

Bryson Shreeve, Richard Selfridge, Stephen Schultz, Celestino Gaeta, Richard Forber

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77534S (2011) https://doi.org/10.1117/12.885136
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

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.

Citation Download Citation

Bryson Shreeve, Richard Selfridge, Stephen Schultz, Celestino Gaeta, and Richard Forber "Magnetic field sensing using D-fiber coupled Bi:RIG slab", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77534S (17 May 2011); https://doi.org/10.1117/12.885136

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