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has been cited by the following article:

• TITLE: Characteristics Analysis of Chemical Concentration Sensor Based on Three-layer FBG

  AUTHORS: Zhaoxia Wu, Xinyan Yu, Erdan Gu, Zhi Kong, Wenchao Li

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

  JOURNAL NAME: Optics and Photonics Journal, Vol.3 No.2B, July 22, 2013

  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.