Analysis and Improvement of a Dual-Core Photonic Crystal Fiber Sensor

Sensors

Hua Wang¹  Jialei Sui¹  Shichao Huang¹  Zhiyong Wang¹  Pibin Bing¹ 

[1] Institute of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;

关键词: dual-core photonic crystal fiber;    wavelength sensitivity;    high linearity;   

DOI  :  10.3390/s18072051

来源: DOAJ

【 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.

【 授权许可】

Unknown