Open AccessUltrawide temperature range operation of SPR sensor utilizing a depressed double cladding fiber coated with Au-Polydimethylsiloxane
Author(s) -
Yang Zhao,
Jianchun Xia,
Shiyu Li,
Ruiling Qi,
Guomeng Zuo,
Wei Li
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.381213
Subject(s) - polydimethylsiloxane , cladding (metalworking) , materials science , refractive index , multi mode optical fiber , surface plasmon resonance , fiber optic sensor , optical fiber , optics , optoelectronics , atmospheric temperature range , temperature measurement , fiber , nanotechnology , composite material , physics , quantum mechanics , meteorology , nanoparticle
A surface plasmon resonance (SPR) temperature sensor on the basis of depressed double cladding fiber (DDCF) is theoretically proposed and experimentally demonstrated for the first time. Simulation analysis implies that the SPR fiber optic structure consisting of a multimode fiber (MMF) inserted into an 8 mm long DDCF is highly sensitive to the refractive index (RI) of the surrounding environment, owing to their mismatched cores, large discrepancy in cladding diameters, and the depressed inner cladding in DDCF. The experimental results further verify that the highest RI sensitivity is 7002 nm/RIU established with a 50nm Au coated DDCF-SPR sensor. Additionally, the temperature sensitivity reaches up to -2.27 nm/ ° C within a wide working temperature range of -30 to 330 ° C by combining polydimethylsiloxane (PDMS) film as the temperature sensitive material with DDCF-Au architecture. The integrated PDMS, Au and DDCF temperature sensor possesses high performance in terms of sensing capability and physical construction, opening a route to their potential applications in other types of sensors.