Fiber grating sensor for measurement of solution refractive index and concentration

WANG Yan1; LIANG Da-kai1; OU Qi-biao2; ZHOU Bing1

doi:10.13873/j.1000-97872007.07.032

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Fiber grating sensor for measurement of solution refractive index and concentration

更新时间：2025-09-11

- Fiber grating sensor for measurement of solution refractive index and concentration
- Issue 7, Pages: 24-26+30(2007)
- 作者机构：
  
  1. 南京航空航天大学智能材料与结构航空科技重点实验室
  2. 广西师范大学物理与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872007.07.032
  CLC： TN253
- Published：2007
- 稿件说明：
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[1]王彦,梁大开,欧启标,周兵.测量液体折射率与浓度的光纤光栅传感器[J].传感器与微系统,2007(07):24-26+30.

WANG Yan1, LIANG Da-kai1, OU Qi-biao2, et al. Fiber grating sensor for measurement of solution refractive index and concentration[J]. 2007, (7): 24-26+30.
[1]王彦,梁大开,欧启标,周兵.测量液体折射率与浓度的光纤光栅传感器[J].传感器与微系统,2007(07):24-26+30. DOI： 10.13873/j.1000-97872007.07.032.

WANG Yan1, LIANG Da-kai1, OU Qi-biao2, et al. Fiber grating sensor for measurement of solution refractive index and concentration[J]. 2007, (7): 24-26+30. DOI： 10.13873/j.1000-97872007.07.032.

摘要

基于长周期光纤光栅的耦合模理论

从简化的三层光纤模型出发

研究了外界环境折射率变化时长周期光纤光栅传输谱的变化

并对氯化钠溶液的浓度和折射率进行了验证。实验结果发现

长周期光纤光栅的谐振波长与氯化钠浓度的变化近似成线性关系

而与折射率成二次曲线关系

这与数值模拟的结果一致。采用长周期光纤光栅测量液体的浓度和折射率的方法结构简单

且传感信号属于波长解调

避免了光强波动及光纤损耗的影响

整个传感系统全光纤化

能够实现对环境介质的在线、实时、快速、精确测量

还可用于特殊测量场合

实现远程遥测功能。

Abstract

Based on the coupling theory and the simplified three-layed model

the influence of the surround refractive index change upon an long period optical grating（LPFG）is studied

its characteristics such as resonant wavelength and peak loss in detail is analyzed.Relation of wavelength shifts in the LPFG and different concentrations of sodium chloride solution is approximate linear

which is agree with the theoretical results.This method is simple

and the signal is wavelength modulated

which is not reflected by the fluctuation of light intensity and the fiber loss.The sensing system is all light transmitted by fiber.It not only can on-line measure

realize rapid accurate measurement for target medium

but also can be used in some special situations and easily realize long distance measurement.

关键词

Keywords

references

基于长周期光纤光栅的高灵敏度温度传感方案 [J]. 何万迅,施文康,叶爱伦. 传感技术学报 . 2002(01)

Investigation of the fundamental behavior of long-period grating sensors [J] . Jason Keith,Sean Puckett,G.E. Pacey. Talanta . 2003 (4)

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