Title :
Photonic Crystal Fiber Temperature Sensor Based on Coupling Between Liquid-Core Mode and Defect Mode
Author :
Qiang Liu ; Shuguang Li ; Hailiang Chen ; Zhenkai Fan ; Jianshe Li
Author_Institution :
Key Lab. of Metastable Mater. Sci. & Technol., Yanshan Univ., Qinhuangdao, China
Abstract :
A high-sensitivity temperature sensor of compact photonic crystal fiber (PCF) based on the coupling between liquid-core mode and defect mode has been analyzed by the finite element method. The temperature sensitive materials with high refractive index (n = 1.65 at 25 °C), which support liquid-core modes, are filled into the central air hole of PCF. Six cores are formed by removing air holes in the second layer. The six cores work as defect modes and show high confinement losses. The liquid-core mode couples to defect mode as the phase matching condition is satisfied. The sensitivity and figure of merit reach -1.85 nm/°C, -0.072/°C and -1.95 nm/°C, -0.035/°C. The temperature sensor is competitive in the reported temperature sensors. The simple structure is easy to fabricate, and the structure can be further improved.
Keywords :
fibre optic sensors; finite element analysis; optical fibre losses; photonic crystals; refractive index; temperature sensors; air holes; compact photonic crystal fiber; confinement losses; defect mode; finite element method; liquid-core mode; phase matching condition; photonic crystal fiber temperature sensor; temperature 25 degC; Couplings; Liquids; Refractive index; Sensitivity; Silicon compounds; Temperature sensors; Photonic crystal fiber; Temperature Sensor; temperature sensor;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2404911
