Title :
Detection of DC and low-frequency AC magnetic fields using an all single-mode fibre magnetometer
Author :
Kersey, A.D. ; Corke, M. ; Jackson, D.A. ; Jones, J.D.C.
Author_Institution :
University of Kent at Canterbury, Physics Laboratory, Canterbury, UK
Abstract :
A technique for the determination of weak DC and low-frequency AC magnetic fields using a single-mode-fibre magnetometer is described. The technique utilises the dependence between the AC responsitivity and bias field to detect small changes in the bias field. Detection sensitivities in the milli-gauss/metre region have been obtained using a bulk nickel magnetostrictive element with microgauss sensitivities predicted for certain types of metallic glass.
Keywords :
fibre optics; magnetic field measurement; magnetometers; nonelectric sensing devices; AC responsivity; Michelson interferometer; bias field; bulk Ni magnetostriction element; detection sensitivity; fibre optics; low-frequency AC magnetic fields; metallic glass; single-mode fibre magnetometer; weak DC magnetic field measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830319
