Multi-point fiber-optic refractive index sensor by using coreless fibers

被引：38

作者：

Liu, Xiuxin ^{[1
]}

Zhang, Xinpu ^{[1
]}

Liu, Yun ^{[1
]}

Liu, Zigeng ^{[1
]}

Peng, Wei ^{[1
]}

机构：

[1] Dalian Univ Technol, Coll Phys & Optoelect Engn, Dalian 116024, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2016年 / 365卷

基金：

中国国家自然科学基金;

关键词：

Multi-point; Multimode interference; Refractive index sensor; MULTIMODE-SINGLE-MODE; HIGH-SENSITIVITY;

D O I：

10.1016/j.optcom.2015.10.071

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a novel multi-point fiber-optic refractive index (RI) sensor based on two different length coreless fibers spliced between single mode fibers (SMF5). The sensing probe operated based on multimode interference. A multi-point interferometer with 25 mm and 30 mm coreless fiber is fabricated and the measurement of RI is realized by measuring the wavelength shift of resonance dips in the transmission spectrum of the multi-point interferometer. Experimental characterization for a multi-point refractometer is presented. In the RI range of 1.3288-1.3666, the corresponding RI sensitivities are 148.60 nm/RIU and 119.27 nm/RIU for each point, respectively. We demonstrate that this multi-point fiber optic interferometer can be used as a simple transducer for RI sensing with comparable sensitivity. (C) 2015 Published by Elsevier B.V.

引用

页码：168 / 172

页数：5

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