Real-time monitoring the change process of liquid concentration using tilted fiber Bragg grating

被引：7

作者：

Jiang, Biqiang ^{[1
]}

Zhao, Jianlian ^{[1
]}

Huang, Zhao ^{[1
]}

Rauf, Abdul ^{[1
]}

Qin, Chuan ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Shaanxi Key Lab Opt Informat Technol, Key Lab Space Appl Phys & Chem, Minist Educ,Sch Sci, Xian 710072, Peoples R China

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 14期

关键词：

LONG-PERIOD GRATINGS; REFRACTIVE-INDEX; TEMPERATURE; REFRACTOMETER; SENSORS;

D O I：

10.1364/OE.20.015347

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and experimentally demonstrate a demodulation technique for real-time monitoring the change process of liquid concentration based on a tilted fiber Bragg grating (TFBG) and differential amplification detection. Continuous variations of the TFBG transmission power are measured by using two photodiodes (or a precision reference voltage generator instead of the referenced photodiode) along with two integrated operational amplifier circuits (IOAC). The voltage-concentration curves are obtained, by recording the output voltages of the two IOACs at different time. The experimental results show that such a fast demodulation technique is capable of measuring the effective glycerol solution concentration over the range of about 89%similar to 69%. (C)2012 Optical Society of America

引用

页码：15347 / 15352

页数：6

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