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Optical fibre magnetic field sensors

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5 Author(s)
Dandridge, A. ; Naval Research Laboratory, Optical Sciences Division, Washington, USA ; Tveten, A.B. ; Sigel, G.H. ; West, E.J.
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A class of high sensitivity fibre-optic magnetic sensors has been developed and successfully tested in the laboratory for the first time. The magnetic sensors employ magnetostrictive jacketing materials in conjunction with conventional single-mode optical fibres. An all-fibre Mach-Zender interferometer was used to detect the magnetically induced changes in optical path length which arise because of strains transferred to the fibre from the magnetostrictive jacket.

Published in:

Electronics Letters  (Volume:16 ,  Issue: 11 )