| 摘要 |
Two light signals (L1',L2') pass, in opposite directions, through a series circuit comprising a first optical fiber (4), a first polarizer (5), a Faraday sensor device (3), a second polarizer (6) and a second optical fiber (7). 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 (8) between the two polari- zers. From light intensities (I1, I2) of the two light signals (L1,L2), after passing through the series cir- cuit, a measuring signal (M) is determined which is independent of vibrations and bending influences in the optical fibers.
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