Microcapillary-Based High-Sensitivity and Wavelength-Tunable Optical Temperature Sensor

Author

Yun Liu ; Zigeng Liu ; Shimeng Chen ; Ming Han ; Wei Peng

Author_Institution

Coll. of Phys. & Optoelectron. Eng., Dalian Univ. of Technol., Dalian, China

Volume

27

Issue

4

fYear

2015

fDate

Feb.15, 15 2015

Firstpage

447

Lastpage

450

Abstract

A high-sensitivity and wavelength-tunable temperature sensor based on a short piece of fused-silica microcapillary (FSC) spliced between two single mode fibers (FSCs) and immerged in ethonal solution is proposed and experimentally investigated. Using the thermo-optic effect of ethanol and high sensitivity to refractive index of the FSC modal interference, the temperature sensitivity of the sensor immerged in ethanol solutions is significantly increased over an FSC sensor in air. Besides, the sensitivity and the feature wavelength of the interferometer can be tuned by adjusting the concentration and refractive index of the filling ethonal solution, which is important for achieving the maximum measurement range.

Keywords

fibre optic sensors; light interference; light interferometry; micro-optics; microsensors; optical design techniques; optical fibre fabrication; optical fibre testing; optical tuning; organic compounds; refractive index; silicon compounds; temperature measurement; temperature sensors; thermo-optical effects; FSC modal interference; FSC sensor; SiO₂; ethonal solution; fused-silica microcapillary-based high-sensitivity optical temperature sensor; fused-silica microcapillary-based wavelength-tunable optical temperature sensor; interferometer; refractive index; single mode fibers; thermo-optic effect; Ethanol; Interference; Liquids; Optical fiber sensors; Sensitivity; Temperature measurement; Temperature sensors; Interference; fiber optic sensor; micro capillary; refractive index;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2377195

Filename

6983530