Sensors 2012, 12(9), 12377-12385; doi:10.3390/s120912377
Article

Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers

1email, 1,2,* email, 1email, 1email, 1email and 1email
Received: 30 July 2012; in revised form: 4 September 2012 / Accepted: 4 September 2012 / Published: 12 September 2012
(This article belongs to the Section Physical Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Fiber-optic interferometric sensors based on graded-index multimode fibers have very high refractive-index sensitivity, as we previously demonstrated. In this paper, spatial-frequency multiplexing of this type of fiber-optic refractive index sensors is investigated. It is estimated that multiplexing of more than 10 such sensors is possible. In the multiplexing scheme, one of the sensors is used to investigate the refractive index and temperature responses. The fast Fourier transform (FFT) of the combined reflective spectra is analyzed. The intensity of the FFT spectra is linearly related with the refractive index and is not sensitive to the temperature.
Keywords: fiber-optic sensors; graded-index multimode fiber (GI-MMF); Fabry-Perot sensor; refractive index sensor; spatial frequency multiplexing
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MDPI and ACS Style

Liu, L.; Gong, Y.; Wu, Y.; Zhao, T.; Wu, H.-J.; Rao, Y.-J. Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers. Sensors 2012, 12, 12377-12385.

AMA Style

Liu L, Gong Y, Wu Y, Zhao T, Wu H-J, Rao Y-J. Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers. Sensors. 2012; 12(9):12377-12385.

Chicago/Turabian Style

Liu, Li; Gong, Yuan; Wu, Yu; Zhao, Tian; Wu, Hui-Juan; Rao, Yun-Jiang. 2012. "Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers." Sensors 12, no. 9: 12377-12385.

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