UV-Curable Polymer Microhemisphere-Based Fiber-Optic Fabry–Perot Interferometer for Simultaneous Measurement of Refractive Index and Temperature

Author

Tan, Xiao Liang ; Geng, Y.F. ; Li, X.J. ; Deng, Y.L. ; Yin, Zheng ; Gao, Ran

Author_Institution

Shenzhen Key Lab. of Sensor Technol., Shenzhen Univ., Shenzhen, China

Volume

6

Issue

4

fYear

2014

fDate

Aug. 2014

Firstpage

1

Lastpage

8

Abstract

A fiber-optic Fabry-Perot interferometer based on UV-curable polymer microhemisphere is proposed and demonstrated. The polymer microhemisphere is formed by adhering and solidifying a liquid microdroplet of UV-curable adhesive to the end face of a cleaved single-mode fiber. The height of polymer microhemisphere could be flexibly controlled by adjusting the diameter of a single-mode fiber. The theoretical and experimental results demonstrate that the refractive index (RI) and the temperature of external environment can be simultaneously measured by the fringe contrast variation and the wavelength shift of reflection spectra separately, alleviating the cross sensitivity effectively. The obtained temperature and RI sensitivities are about 0.19 nm/°C and 260 dB/RIU in the RI range of 1.38-1.42.

Keywords

Fabry-Perot interferometers; curing; fibre optic sensors; optical polymers; reflectivity; refractive index measurement; temperature measurement; UV-curable polymer microhemisphere; cleaved single-mode fiber; fiber-optic Fabry-Perot interferometer; fringe contrast variation; liquid microdroplet; polymer microhemisphere; reflection spectra wavelength shift; refractive index; refractive index measurement; temperature measurement; Liquids; Optical fiber sensors; Polymers; Refractive index; Sensitivity; Temperature measurement; Temperature sensors; Fabry??Perot interferometer; UV-curable adhesive; refractive index sensor; temperature sensor;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2014.2332460

Filename

6842650