Sensitivity-enhanced temperature sensor by hybrid cascaded configuration of a Sagnac loop and a F-P cavity

被引：134
|
作者：
Yang, Yuqiang [1 ,2 ]
Wang, Yongguang [2 ]
Zhao, Yuxin [2 ]
Jiang, Jiuxing [2 ]
He, Xunjun [2 ]
Yang, Wenlong [2 ]
Zhu, Zhihan [3 ,4 ]
Gao, Wei [3 ,4 ]
Li, Linjun [5 ]
机构：
[1] Harbin Univ Sci & Technol, Key Lab Engn Dielect & Its Applicat, Minist Educ Harbin, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Univ Sci & Technol, Coll Sci, Harbin 150080, Heilongjiang, Peoples R China
[3] Wang Da Heng Collaborat Innovat Ctr Sci Quantum M, Harbin 150080, Heilongjiang, Peoples R China
[4] Harbin Univ Sci & Technol, Harbin 150080, Heilongjiang, Peoples R China
[5] Heilongjiang Inst Technol, Inst Optoelect Technol, Harbin 150050, Heilongjiang, Peoples R China
来源：
OPTICS EXPRESS | 2017年 / 25卷 / 26期
基金：
中国国家自然科学基金;
关键词：
MACH-ZEHNDER INTERFEROMETER; PHOTONIC CRYSTAL FIBER; CORE OPTICAL-FIBER; PRESSURE; GRATINGS;
D O I：
10.1364/OE.25.033290
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A hybrid cascaded configuration consisting of a fiber Sagnac interferometer (FSI) and a Fabry-Perot interferometer (FPI) was proposed and experimentally demonstrated to enhance the temperature intensity by the Vernier-effect. The FSI, which consists of a certain length of Panda fiber, is for temperature sensing, while the FPI acts as a filter due to its temperature insensitivity. The two interferometers have almost the same free spectral range, with the spectral envelope of the cascaded sensor shifting much more than the single FSI. Experimental results show that the temperature sensitivity is enhanced from -1.4 nm/degrees C (single FSI) to -29.0 (cascaded configuration). The enhancement factor is 20.7, which is basically consistent with theoretical analysis (19.9). (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：33290 / 33296
页数：7
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