Title :
Phase shift nulling DC-field fibre-optic magnetometer
Author :
Kersey, A.D. ; Corke, M. ; Jackson, D.A.
Author_Institution :
University of Kent at Canterbury, Physics Laboratory, Canterbury, UK
Abstract :
A closed-loop DC-field fibre-optic magnetometer is described which utilises the dependence of the AC magneto-strictive responsitivity of a metallic glass sensing element on the local DC field in order to detect low-frequency or DC changes in the total local field. A detection sensitivity of -2 ¿Gs has been demonstrated at frequencies below 2 Hz.
Keywords :
fibre optics; magnetic field measurement; magnetometers; nonelectric sensing devices; AC magnetostrictive responsitivity; fibre-optic magnetometer; local field LF variations; magnetic field measurement; metallic glass sensing element; nulling DC-field; phase shift closed-loop type;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840396
