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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 8,
  • Issue 4,
  • pp. 392-394
  • (2010)

Novel optical fiber current sensor based on magnetic fluid

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Abstract

A novel fiber optic Fabry-Perot (F-P) current sensor is developed based on magnetic fluid as the medium in F-P interference cavity. A signal demodulation method based on slanted fiber Bragg grating (FBG) wavelength measurement system 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. The thickness of magnetic fluid film and initial concentration will affect the measurement results.

© 2010 Chinese Optics Letters

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