Open AccessInvestigation of a novel SMS fiber based planar multimode waveguide and its sensing performance
Author(s) -
Xianfan Wang,
Jiquan Zhang,
Ke Tian,
Shunbin Wang,
Libo Yuan,
Elfed Lewis,
Gerald Farrell,
Pengfei Wang
Publication year - 2018
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.26.026534
Subject(s) - multi mode optical fiber , optics , materials science , graded index fiber , fiber , planar , polarization maintaining optical fiber , optical fiber , photonic crystal fiber , single mode optical fiber , refractive index , fiber optic sensor , dispersion shifted fiber , plastic optical fiber , beam propagation method , optoelectronics , computer science , physics , computer graphics (images) , composite material
A novel, MMI-based all-fiber structure, which consists of two single-mode fibers and a multimode fiber polished on both sides, is described. The light propagation characteristics of this fiber structure, as well as its superior sensing performance, are analyzed theoretically by using the beam propagation method (BPM). This fiber structure demonstrates a significant spectral response to changes of the surrounding refractive index (RI), and the measured results exhibit good agreement with the predicted data. The measured average RI sensitivity is as high as 151.29 nm/RIU over an RI range from 1.3450 to 1.4050, when the polished depth is 30 µm on both sides of the multimode fiber. This fiber structure can be an advantageous platform for various applications, especially for a lab-on-fiber type sensing application.
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