光子晶体光纤
线性
灵敏度(控制系统)
材料科学
波长
折射率
分析物
芯(光纤)
有限元法
光学
包络线(雷达)
光电子学
物理
化学
电信
复合材料
电子工程
热力学
计算机科学
工程类
量子力学
物理化学
雷达
作者
Pibin Bing,Shichao Huang,Jialei Sui,Hua Wang,Zhiyong Wang
出处
期刊:Sensors
[MDPI AG]
日期:2018-06-27
卷期号:18 (7): 2051-2051
被引量:28
摘要
The characteristics of the dual-core photonic crystal fiber (PCF) sensor are studied using the finite element method (FEM), and the structure is improved according to the numerical simulation results. The results show that whether or not the four large air holes far away from the geometry center of the PCF are filled with analyte has no influence on the wavelength sensitivity of the sensor which means those holes can be replaced by small air holes. The wavelength sensitivity can be tuned by adjusting the sizes of the other large air holes which are as for liquid holes. The dynamic detection range of the refractive index (RI) is from 1.33 to 1.51. In particular, high linearity is obtained in the range of 1.44 to 1.51. The sensitivity is as high as 6021 nm/RIU when the liquid holes are the smallest. When liquid holes are tangential with the envelope of first layer air holes, the wavelength sensitivity is 4028 nm/RIU, and the coefficient of determination (R²) is 0.99822 when the RI of the analyte varies from 1.44 to 1.51 which shows that high sensitivity and good linearity are both obtained.
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