Detection of liquid-level variation using a side-polished fiber Bragg grating

被引：48

作者：

Dong Xiaowei ^{[1
]}

Zhao Ruifeng ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Inst Lightwave Technol, State Key Lab All Opt Network & Adv Telecommun Ne, Beijing 100044, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2010年 / 42卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Liquid-level sensor; Fiber Bragg grating; Side-polished; SENSITIVITY;

D O I：

10.1016/j.optlastec.2009.06.015

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A liquid-level sensor based on a side-polished fiber Bragg grating (FBG) is proposed and experimentally demonstrated. The sensor can detect height variation of liquids of arbitrary refractive index (RI). For liquids with RI lower than that of fiber core, liquid-level variation can be monitored by the peak power difference of the grating segments surrounded by the liquid and air. For liquids with RI higher than that of fiber core, liquid-level information can be obtained from the influence of the shortening of the effective length of the immersed grating segment upon the reflection spectrum. (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：214 / 218

页数：5

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