Chinese Optics Letters, Volume. 8, Issue 4, 392(2010)
Novel optical fiber current sensor based on magnetic fluid
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.
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Tao Hu, Yong Zhao, Xing Li, Jingjing Chen, Zhiwei Lv. Novel optical fiber current sensor based on magnetic fluid[J]. Chinese Optics Letters, 2010, 8(4): 392
Received: Jun. 18, 2009
Accepted: --
Published Online: Apr. 20, 2010
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