Title :
Optical fibre Faraday rotation current sensor with closed-loop operation
Author :
Kersey, A.D. ; Dandridge, A.
Author_Institution :
Naval Research Laboratory, Washington, USA
Abstract :
A novel closed-loop fibre-optic current sensor based on the Faraday effect is described which maintains a constant sensitivity to AC currents in the presence of large quasi-DC and low-frequency current fluctuations. A Verdet constant of 2.55×10¿6 rad/A (at 0.83 ¿m) is reported for the fibre used.
Keywords :
Faraday effect; electric current measurement; fibre optic sensors; light interferometers; AC currents; DC currents; Faraday effect; Michelson interferometer; closed-loop operation; constant sensitivity; current sensor; feedback stabilisation; fibre optic sensors; low-frequency current fluctuations; magneto-optical effects;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850329
