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

• 作者: Erdan Gu Wenchao Li Xinyan Yu Zhaoxia Wu Zhi Kong
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 医学
• 关键词: Fiber BRAGG grating(FBG) Three-layer Structure Refractive Index CONCENTRATION of Solution CHEMICAL SENSOR
• 年，卷（期）: 2013,（2）
• 页码范围: 268-271
• 页数: 4页
• 分类号: R73

摘要

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.