Open AccessRefractive index insensitive temperature sensor based on specialty triple-clad fiber
Author(s) -
Xinghu Fu,
Hongqiang Xie,
Xianglong Zeng,
Guangwei Fu,
Weihong Bi
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.002320
Subject(s) - cladding (metalworking) , materials science , refractive index , optics , resonance (particle physics) , wavelength , photonic crystal fiber , fiber optic sensor , optical fiber , double clad fiber , all silica fiber , atmospheric temperature range , graded index fiber , optoelectronics , composite material , physics , particle physics , meteorology
A refractive index (RI) insensitive temperature sensor based on specialty triple-clad fiber (STCF) is proposed. Based on coupling mode theory, the STCF can be equivalent to a rod waveguide and two tube waveguides. Then the cladding mode resonance characteristic of STCF is analyzed by calculating different mode dispersion curves, which indicates that it works only on the mode resonance from core to the fluorine-doped silica cladding, and finally a resonance wavelength can be obtained. Two straightforward experiments are performed to prove its sensing properties. Experimental results show that it has sensitivities of 72.17 pm/°C at temperature range from 35°C~95°C with characteristics of insensitive to external RI in the range from 1.3450 to 1.4607. Thus, this proposed sensor can be used for solution temperature monitoring in real time.