Mach-Zehnder interferometer sensor based on the U-shaped probe for concentration sensing

被引：2

作者：

Hu, Xingliu ^{[1
]}

Chuan, Tjin Swee ^{[2
]}

Wang, Yan ^{[3
]}

Fang, Ting ^{[3
]}

机构：

[1] Jinling Inst Technol, Coll Intelligent Sci & Control Engn, Nanjing 211169, Jiangsu, Peoples R China

[2] Nanyang Technol Univ, Elect & Elect Engn, Singapore 639798, Singapore

[3] Anhui Univ Technol, Coll Informat & Elect Engn, Maan Shan 243002, Anhui, Peoples R China

来源：

OPTIK | 2016年 / 127卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Sensitivity; Tapered fibre; Mach-Zehnder interferometer; Sensor; Evanescent field; FIELD ABSORPTION SENSOR; FIBER; GRATINGS;

D O I：

10.1016/j.ijleo.2015.11.136

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A newly compact bent tapered optical fibre sensor is proposed and demonstrated for the detection of levofloxacin concentration. The structure of micro fibre Mach-Zehnder interferometer (MMZI) is fabricated using a glass processing system, demonstrating a 30 mm-long single mode fibre between two tapered fibres which has a waist diameter of 15 pm and tapering length of 6 mm. A combination of bending and tapering acts as a sensor, which results in high penetration depth of evanescent field. The sensor is sensitive to concentration variation. Upon exposure to Levofloxacin concentrations varying from 50 to 250 ppm, the U-shaped MMZI sensor sensitivity is 21 pm/ppm and a linearity of more than 98.7%, which is about 1.49 fold greater than that of a straight MMZI sensor. In addition, the U-shaped MMZI sensor is very compact in size which make this type of fibre sensor is easily measuring concentration variation in small volume. (C) 2015 Elsevier GmbH. All rights reserved.

引用

页码：2183 / 2186

页数：4