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11 November 2014 Magnetooptic sensor based on field-induced birefringence compensation
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Abstract
Two novel magnetooptic sensors are proposed which are based on mutual compensation of external field-induced linear or circular birefringence. One is based on mutual compensation of the external field-induced linear birefringence produced by both magnetooptic Cotton-Mouton effect and electrooptic Kerr effect. The other one is based on mutual compensation of the external field-induced circular birefringence in crystals exhibiting both Faraday magnetooptic effect and electrogyration effect, such as lead molybdate (PbMoO4) crystal. The 50Hz ac magnetic field in the range of 167Gs was measured by means of electrogyration compensation. Compensating voltage was about 16.5V/Gs for single lead molybdate crystal with a length of 5mm along its principal optical axis. The two proposed magnetooptic sensors can be used in the closed-loop measurement of magnetic field.
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Changsheng Li "Magnetooptic sensor based on field-induced birefringence compensation", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 927403 (11 November 2014); https://doi.org/10.1117/12.2073609
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