Ultracompact and high sensitive refractive index sensor based on Mach-Zehnder interferometer

被引：50

作者：

Yu, Huaqing ^{[1
,2
]}

Xiong, Liangbin ^{[1
]}

Chen, Zhihong ^{[1
]}

Li, Qianguang ^{[1
]}

Yi, Xunong ^{[1
]}

Ding, Yu ^{[3
]}

Wang, Feng ^{[3
]}

Lv, Hao ^{[1
]}

Ding, Yaoming ^{[1
]}

机构：

[1] Hubei Engn Univ, Sch Phys & Elect Informat Engn, Xiaogan 432000, Peoples R China

[2] Hubei Engn Univ, Hubei Key Lab Qual Control Characterist Fruits &, Xiaogan 432000, Peoples R China

[3] Hubei Engn Univ, Coll Chem & Mat Sci, Xiaogan 432000, Peoples R China

来源：

OPTICS AND LASERS IN ENGINEERING | 2014年 / 56卷

基金：

湖北省教育厅重点项目;

关键词：

Nanofiber; Polymer; Mach-Zehnder interferometer; Refractive index sensor; OPTICAL-FIBER; WAVE-GUIDE; LIQUIDS;

D O I：

10.1016/j.optlaseng.2013.12.006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report an ultracompact and high sensitive refractive index (RI) sensor based on Mach-Zehnder interferometer (MZI) structure. The sensor was assembled using flexible poly(trimethylene terephthalate) nanofiber with a diameter of 700 nm. The valley wavelength shifts of the output spectra of the sensor caused by the variation of ambient medium around the MZI structure region were measured. In the RI range from 1.34 to 1.39, the highest measured sensitivity of the sensor is about 1100 nm/RIU (RI unit), which is 6 times higher than that of S-like abrupt taper based MZI sensors, and the RI detection limit is about 1.8 x 10(-6). The sensor allows the construction of a low-cost, compact, simple, and highly sensitive sensing system. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：50 / 53

页数：4

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