High-sensitivity salinity sensor based on optical microfiber coil resonator

被引：19

作者：

Yin, Y. ^{[1
]}

Li, S. ^{[1
]}

Ren, J. ^{[1
]}

Farrell, G. ^{[2
]}

Lewis, E. ^{[3
]}

Wang, P. ^{[1
,4
]}

机构：

[1] Harbin Engn Univ, Coll Sci, Key Lab In Fiber Integrated Opt, Minist Educ, Harbin 150001, Heilongjiang, Peoples R China

[2] Dublin Inst Technol, Photon Res Ctr, Kevin St, Dublin 8, Ireland

[3] Univ Limerick, Dept Elect & Comp Engn, Opt Fibre Sensors Res Ctr, Limerick, Ireland

[4] Shenzhen Univ, Coll Optoelect Engn, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 26期

基金：

国家重点研发计划; 黑龙江省自然科学基金; 中国国家自然科学基金;

关键词：

D O I：

10.1364/OE.26.034633

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A simple, compact, and high-sensitivity optical sensor for salinity measurement is reported based on an optical microfiber coil resonator (MCR). The MCR is manufactured by initially wrapping microfiber on a polymethylmethacrylate (PMMA) rod, which is dissolved to leave a hollow cylindrical fluidic channel within the coil for measurement. Based on the light propagation through the MCR, the device's spectrum moves to long wavelengths with increased salinity in the fluid. The MCR device's sensitivity can reach up to 15.587 nm/% with a resolution of 1.28 x 10(-3)%. It is also confirmed that the temperature dependence is 79.87 pm/degrees C, which results from the strong thermal-expansion coefficient of the low refractive index epoxy. The experimental results indicate that the device can be widely used as a high sensitivity salinity sensor in water and other liquids due to its stability, compactness, electromagnetic immunity, and high sensitivity. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：34633 / 34640

页数：8

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