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FULL-POLARIZATION FARADAY MAGNETIC FIELD SENSOR BASED ON SAGNAC INTERFERENCE SYSTEM AND MODULATION METHOD THEREFOR
FULL-POLARIZATION FARADAY MAGNETIC FIELD SENSOR BASED ON SAGNAC INTERFERENCE SYSTEM AND MODULATION METHOD THEREFOR
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机译:基于SAGNAC干扰系统的全极化法拉第磁场传感器及其调制方法
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摘要
A full-polarization Faraday magnetic field sensor based on a Sagnac interference system and a modulation method are provided. The full-polarization Faraday magnetic field sensor includes a light source, an optical fiber coupler, a polarizer, a polarization beam splitter, a polarization controller, a magnetic field sensing unit, a detector and a polarization maintaining optical fiber. An optical signal is emitted by the light source, passes through the optical fiber coupler and the polarizer in sequence, and is divided into a clockwise path and an anticlockwise path by the polarization beam splitter. Angles between fast axis directions of the two polarization maintaining optical fiber loops and a polarization direction of the polarizer are respectively clockwise 45° and anticlockwise 45°. The two polarization maintaining optical fiber loops has opposite winding directions, a same diameter, and a same number of winding turns.
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