Highly sensitive fiber Bragg grating refractive index sensors

被引：556

作者：

Liang, W ^{[1
]}

Huang, YY ^{[1
]}

Xu, Y ^{[1
]}

Lee, RK ^{[1
]}

Yariv, A ^{[1
]}

机构：

[1] CALTECH, Dept Appl Phys, Pasadena, CA 91125 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 15期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1904716

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We combine fiber Bragg grating (FBG) technology with a wet chemical etch-erosion procedure and demonstrate two types of refractive index sensors using single-mode optical fibers. The first index sensor device is an etch-eroded single FBG with a radius of 3 mu m, which is used to measure the indices of four different liquids. The second index sensor device is an etch-eroded fiber Fabry-Perot interferometer (FFPI) with a radius of similar to 1.5 mu m and is used to measure the refractive indices of isopropyl alcohol solutions of different concentrations. Due to its narrower resonance spectral feature, the FFPI sensor has a higher sensitivity than the FBG sensor and can detect an index variation of 1.4 X 10(-5). Since we can measure the reflection signal, these two types of sensors can be fabricated at the end of a fiber and used as point sensors. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 24 条

[1] Detection of volatile organic compound vapors by using a vapochromic material on a tapered optical fiber [J].