METHOD AND ARRANGEMENT FOR MEASURING A MAGNETIC FIELD USING THE FARADAY EFFECT WITH COMPENSATION OF INTENSITY CHANGES

摘要

PCT No. PCT/DE96/00208 Sec. 371 Date Aug. 22, 1997 Sec. 102(e) Date Aug. 22, 1997 PCT Filed Feb. 9, 1996 PCT Pub. No. WO96/26452 PCT Pub. Date Aug. 29, 1996Two light signals pass, in opposite directions, through a series circuit comprising a first optical fiber, a first polarizer, a Faraday sensor device, a second polarizer and a second optical fiber. To set the working point, additionally, the planes of polarization of both light signals are reciprocally rotated by a predetermined angle of rotation by rotation means between the two polarizers. From light intensities of the two light signals, after passing through the series circuit, a measuring signal is determined which is independent of vibrations and bending influences in the optical fibers.