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A fiber-optic magnetic gradiometer

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2 Author(s)
Koo, K.P. ; Naval Research Laboratory, Washington, DC, USA ; Sigel, G.H.

A fiber-optic magnetic gradiometer capable of measuring both ac and dc magnetic-field gradients has been designed and demonstrated. An approach using real-time magnetic balancing and trimming has been deployed. A device sensitivity of 0.1 gamma (10-6Oe) per centimeter of sensor head separation for 1 m of magnetically active fiber is achievable.

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Lightwave Technology, Journal of  (Volume:1 ,  Issue: 3 )