Zhaoxia Wu, Xinyan Yu, Erdan Gu, Zhi Kong, Wenchao Li
College of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao Hebei 066004, China.
DOI: 10.4236/opj.2013.32B063   PDF    HTML     4,377 Downloads   5,968 Views   Citations

Abstract

The three-layer structure model of the fiber Bragg grating is proposed in this paper. And through experimental study and reasoning calculation to verify the three layer structure of the optical waveguide model, so the sensitivity characteristic of the Bragg wavelength to the refractive index of chemical solution is obtained. And the relationships between the concentration and the shift of Bragg wavelength of sucrose, ethanol, and Nacl solution are achieved. Finally the shifts of the Bragg wavelength with the external concentration are obtained by experiments. A kind of simple structure, small size, good stability, high sensitivity chemical concentration sensor is obtained.

Keywords

Fiber Bragg grating(FBG); Three-layer Structure; Refractive Index; Concentration of Solution; Chemical Sensor

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Conflicts of Interest

The authors declare no conflicts of interest.

References

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