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

Volume

7

Issue

2

fYear

2015

fDate

Apr-15

Firstpage

1

Lastpage

9

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;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2404911

Filename

7047739