High-sensitivity refractive index sensor with cascaded dual-core photonic crystal fiber based on vernier effect

被引：0
|
作者：
Zhang, Yanjun [1 ]
Wang, Lizhi [1 ]
Jia, Pinggang [1 ,2 ]
Zhai, Chengrui [1 ]
An, Guowen [1 ]
Liu, Lei [1 ]
Zhu, Fengtong [1 ]
Su, Jianhui [1 ,2 ]
机构：
[1] State Key Laboratory of Dynamic Measurement, North University of China, Taiyuan,030051, China
[2] Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan,030051, China
来源：
Optik | 2022年 / 256卷
基金：
中国国家自然科学基金; 山西省青年科学基金;
关键词：
Nonlinear optics - Refractometers - Single mode fibers - Temperature distribution - Water quality - Crystal whiskers - Photonic crystal fibers - Temperature sensors;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A cascaded dual-core photonic crystal fiber (DC-PCF) refractive index sensor is proposed. The sensor is composed by cascading a single-mode fiber with a DC-PCF, thus realizing the vernier effect. The central air hole of the DC-PCF is filled with different refractive indices. The refractive index sensitivity is investigated using the full vector finite element method (FEM). The simulation results show that the cascade structure of the DC-PCF with three different air hole diameter parameters has high sensitivity up to −303376 nm/RIU in the refractive index range of 1.362–1.366, and the highest sensitivity of the cascade corresponds to a resolution of 3.30 × 10−7. The sensitivity is increased by 37 times compared to the DC-PCF without vernier effect.By replacing the central air hole material, the sensor can be used for temperature sensing, magnetic field sensing and water quality analysis. © 2022 Elsevier GmbH
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