Title :
Detection of low-frequency magnetic signals in a magnetostrictive fiber-optic sensor with suppressed residual signal
Author :
Dagenais, D.M. ; Bucholtz, F. ; Koo, K.P. ; Dandridge, A.
Author_Institution :
Sachs Freeman Associates, Landover, MD, USA
fDate :
6/1/1989 12:00:00 AM
Abstract :
A correlation is presented between experimental data obtained under various operating conditions and a modified coherent rotation model which predicts the behavior of the residual signal and the sideband noise. The authors identify an operating regime that eliminates the residual signal and gives rise to a reduction in noise levels by a factor of five over previously reported results. Minimum detectable fields of 11±2pT/√Hz at 1 Hz and 38±8 pT/√Hz at 0.2 Hz are achieved
Keywords :
fibre optic sensors; interference suppression; magnetic field measurement; magnetostrictive devices; coherent rotation model; low-frequency magnetic signals; magnetic signal detection; magnetostrictive fiber-optic sensor; noise level reduction; operating regime; sideband noise; suppressed residual signal; Amorphous magnetic materials; Frequency; Glass; Low-frequency noise; Magnetic field induced strain; Magnetic noise; Magnetic sensors; Magnetostriction; Optical fiber sensors; Optical fibers;
Journal_Title :
Lightwave Technology, Journal of
