Title :
High-frequency fibre-optic magnetometer with 70 fT/ square root (Hz) resolution
Author :
Bucholtz, Frank ; Dagenais, D.M. ; Koo, K.P.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
Using a cylindrical, DC field biased magnetostrictive transducer in a fibre-optic magnetometer, the authors demonstrate 70 fT/ square root (Hz) resolution near 34 kHz. This represents 30 dB improvement over previous results. Resolution is limited by interferometric phase noise and is free from upconverted low-frequency noise and residual signal effects.
Keywords :
fibre optic sensors; magnetometers; magnetostrictive devices; 34 kHz; DC field biased; HF type; cylindrical transducer; fibre-optic magnetometer; interferometric phase noise; magnetostrictive transducer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19891150
