Highly sensitive fiber Bragg grating refractive index sensors
Highly sensitive fiber Bragg grating refractive index sensors
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DOI：
10.1063/1.1904716
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发表时间：
2005-04-11
影响因子：
4
通讯作者：
Yariv, A
中科院分区：
文献类型：
--
作者：
Liang, W;Huang, YY;Yariv, A
我们结合联合收割机光纤布拉格光栅（FBG）技术与湿化学腐蚀过程，并演示了两种类型的折射率传感器使用单模光纤。第一种折射率传感器是一个半径为3 μ m的腐蚀型单光纤光栅，用于测量四种不同液体的折射率。第二种折射率传感器装置是一种半径近似为1.5 μ m的腐蚀光纤法布里-珀罗干涉仪（FFPI），用于测量不同浓度异丙醇溶液的折射率。由于其较窄的共振光谱特征，FFPI传感器具有比FBG传感器更高的灵敏度，并且可以检测1.4 X 10（-5）的折射率变化。由于我们可以测量反射信号，这两种类型的传感器可以制作在光纤的末端，并用作点传感器。(C)2005年美国物理学会。
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.