Tao Hu, Zhiwei Lv, Yong Zhao, Xing Li, Jingjing Chen
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Novel Optical Fiber Magnetic Sensor Based on Magnetic Fluid
A novel fiber optic F-P electromagnetic sensor is developed based on magnetic fluid as the medium in F-P interference cavity. A signal demodulation method based on fiber Bragg grating wavelength scanning is proposed. Theory and principle of electromagnetic-controlled refractive index of the magnetic fluid is described as well as the structure of the sensor system. Preliminary experiments are carried out, and the results indicate that there is a fairly good linearity of the measurement characteristic, and the thickness of magnetic fluid film and environmental temperature will affect the measurement results.
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