PROCESS AND ARRANGEMENT FOR MEASURING A MAGNETIC FIELD USING THE FARADAY EFFECT WITH COMPENSATION FOR VARIATIONS IN INTENSITY AND TEMPERATURE EFFECTS

摘要

Two light signals pass through a series connectionof a first multimode optical fiber, a first polarizer, aFaraday sensor device, a second polarizer and a second multi-mode optical fiber in opposite directions. The polarizationaxes of the two polarizers are set at a polarizer angle .eta. or .theta.to the natural axis of the linear birefringence in the sensordevice with cos(2.eta. + 2.theta.) = -2/3. The measuring signal isderived as the quotient of two linear functions of the lightintensities of the two light signals after passing through theseries connection.