A Fiber Bragg Grating Sensor Interrogation System Based on a Linearly Wavelength-Swept Thermo-Optic Laser Chip

被引：18

作者：

Lee, Hyung-Seok ^{[1
]}

Lee, Hwi Don ^{[1
]}

Kim, Hyo Jin ^{[2
]}

Cho, Jae Du ^{[3
]}

Jeong, Myung Yung ^{[1
]}

Kim, Chang-Seok ^{[1
]}

机构：

[1] Pusan Natl Univ, World Class Univ Program, Dept Cogno Mechatron Engn, Pusan 609735, South Korea

[2] LG Elect, Res Inst, Dept Prod Engn, Pyeongtaek Si 451713, South Korea

[3] Univ Calif Irvine, Dept Biomed Engn, Irvine, CA 92612 USA

来源：

SENSORS | 2014年 / 14卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

thermo-optic effect; swept source; fiber Bragg grating; strain sensor; FILTER;

D O I：

10.3390/s140916109

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A linearized wavelength-swept thermo-optic laser chip was applied to demonstrate a fiber Bragg grating (FBG) sensor interrogation system. A broad tuning range of 11.8 nm was periodically obtained from the laser chip for a sweep rate of 16 Hz. To measure the linear time response of the reflection signal from the FBG sensor, a programmed driving signal was directly applied to the wavelength-swept laser chip. The linear wavelength response of the applied strain was clearly extracted with an R-squared value of 0.99994. To test the feasibility of the system for dynamic measurements, the dynamic strain was successfully interrogated with a repetition rate of 0.2 Hz by using this FBG sensor interrogation system.

引用

页码：16109 / 16116

页数：8

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