High sensitivity refractive index sensing of Mach-Zehnder interferometer based on multimode fiber core sandwiched between two waist-enlarged fiber tapers

被引：19
|
作者：
Shao, Min [1 ]
Qiao, Xueguang [2 ]
Fu, Haiwei [1 ]
Liu, Yinggang [1 ]
Zhao, Xue [1 ]
Yao, Ni [1 ]
机构：
[1] Xian Shiyou Univ, Key Lab Photoelect Oil Gas Logging & Detecting, Minist Educ, Sch Sci, Xian 710072, Peoples R China
[2] NW Univ Xian, Dept Phys, Xian 710069, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2014年 / 311卷
基金：
美国国家科学基金会;
关键词：
Mach-Zhhnder interferometer; Waist-enlarged fiber taper; Multimode fiber core; Refractive index sensing; PHOTONIC CRYSTAL FIBER; MODAL INTERFEROMETER; OPTICAL-FIBER; REFRACTOMETER; MICROFIBER; INTERFERENCE; TEMPERATURE;
D O I：
10.1016/j.optcom.2013.08.090
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A taper based Mach-Zehnder interferometer (MZI) for high sensitivity refractive index (RI) measurement is investigated. The sensor head consists of two waist-enlarged tapers, in which a section of multimode fiber core (MMFC) is sandwiched to improve the sensitivity of the MZI. Theoretical analysis shows that the RI sensitivity could be enhanced by reducing the MMFC diameter, which is verified in the experiments. A high RI sensitivity of 430.94 nm/RIU and resolution of 4.64 x 10(-5) are achieved in the RI range of 1.33-1.39 for the MZI with MMFC core diameter of 68.5 um. The temperature response of the MZI is also demonstrated. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：359 / 363
页数：5
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