Characteristics Analysis of Chemical Concentration Sensor based on FBG

MAO Rui; WU Zhao-xia

doi:10.13756/j.gtxyj.2018.04.011

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Characteristics Analysis of Chemical Concentration Sensor based on FBG

- Characteristics Analysis of Chemical Concentration Sensor based on FBG
- Study on Optical communication Issue 4, Pages: 44-47(2018)
- 作者机构：
  
  1. 天津机电职业技术学院电气学院
  2. 东北大学秦皇岛分校控制工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2018.04.011
  CLC： TP212
- Published：2018，
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[1]毛蕊,吴朝霞.基于FBG的化学浓度传感器的特性分析[J].光通信研究,2018(04):44-47.

MAO Rui, WU Zhao-xia. Characteristics Analysis of Chemical Concentration Sensor based on FBG. [J]. (4):44-47(2018)
[1]毛蕊,吴朝霞.基于FBG的化学浓度传感器的特性分析[J].光通信研究,2018(04):44-47. DOI： 10.13756/j.gtxyj.2018.04.011.

MAO Rui, WU Zhao-xia. Characteristics Analysis of Chemical Concentration Sensor based on FBG. [J]. (4):44-47(2018) DOI： 10.13756/j.gtxyj.2018.04.011.

摘要

文章基于光纤耦合模理论和倏逝场理论建立了光纤布拉格光栅三层结构模型

并通过推理计算和实验研究验证了三层结构的光波导模型

得出布拉格波长对化学溶液的折射率敏感性特征。同时

根据溶液浓度与其折射率关系理论建立了浓度与其折射率之间的近似线性关系式

并分析得出蔗糖、乙醇和Nacl三种溶液浓度与布拉格波长的关系

最后通过仿真实验得到不同溶液对应的布拉格波长随外部浓度变化的情况

获得一种结构简单、体积小、稳定性好、灵敏度高且无需敏感元件的化学浓度传感器。

Abstract

Based on the coupled-mode theory and the evanescent field theory

three-layer structure model of the Fiber Bragg Grating（FBG）is proposed and verified through experimental study and reasoning calculation.The sensitivity characteristic of the Bragg wavelength to the refractive index of chemical solution is then obtained.The approximate linear relation between concentration and refractive index is established based on relation theory of concentration and refractive index.The relationships between the concentration and Bragg wavelength of sucrose

ethanol

and Nacl are obtained through analysis.Finally the changes of the Bragg wavelength with the external concentration are obtained by simulations.A chemical concentration sensor is realized with the characteristics of simple structure

small size

good stability

high sensitivity

and free of sensitive components.

关键词

光纤布拉格光栅折射率溶液浓度化学传感器

Keywords

FBGrefractive indexconcentration of solutionchemical sensor

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Related Institution

School of Ocean Technology Sciences, Qilu University of Technology (Shandong Academy of Sciences)

Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences)

Beijing Laboratory of Optical Fiber Sensing and Systems, Beijing Information Science and Technology University

Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University

State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

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