Fiber-optic DC magnetic field sensor with balanced detection technique

The authors describe a balanced detection technique that suppresses undesirable effects due to residual signals for the detection of DC and low-frequency magnetic fields with intermetric fiber-optic sensors using metallic glass. The detection technique utilizes a square-wave magnetic field modulation that translates the residual signal outside of the detection bandwidth. Experimental results are presented that show effective suppression of the residual signal.<
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