Design and optimization of multimode fiber sensor based on surface plasmon resonance

Author

Peiling Mao ; Yunhan Luo ; Xiaolong Chen ; Junbin Fang ; Hankai Huang ; Chaoying Chen ; Shuihua Peng ; Jun Zhang ; Jieyuan Tang ; Huihui Lu ; Zhe Chen ; Jianhui Yu

Author_Institution

Key Lab. of Optoelectron. Inf. & Sensing Technol., Jinan Univ., Guangzhou, China

fYear

2014

fDate

1-4 Sept. 2014

Firstpage

119

Lastpage

120

Abstract

Using finite element method (FEM), a D-shaped multimode fiber sensor (MFS) based on surface plasmon resonance (SPR) was designed and optimized. Here the core radius of multimode fiber is 52.5μm. The simulations show that the resonant wavelengths of 45th~50th propagation modes and their wavelength redshifts due to the ambient refractive index change are all the same. Among the SPR spectrums for different modes, higher order mode will induce deeper notch and larger extinction ratio. By tracing the wavelength shift of the 45th mode, the MFS was optimized. The optimized MFS has 75μm residual fiber thickness and gold film coated on D-shaped multimode fiber. Its average sensitivity of 4989nm/RIU can be attained, which is much higher than 3150nm/RIU of the single mode fiber SPR sensor in the ref. [1].

Keywords

fibre optic sensors; finite element analysis; gold; refractive index; surface plasmon resonance; Au; FEM; finite element method; multimode fiber sensor; refractive index; size 52.5 mum; size 75 mum; surface plasmon resonance; wavelength 3150 nm; wavelength 4989 nm; Films; Gold; Optical fiber dispersion; Optical fiber sensors; Optical fibers; Plasmons; Sensitivity; Refractive index; multimode fiber sensor; sensitivity; surface plasmon resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Numerical Simulation of Optoelectronic Devices (NUSOD), 2014 14th International Conference on

Conference_Location

Palma de Mallorca

ISSN

2158-3234

Print_ISBN

978-1-4799-3681-6

Type

conf

DOI

10.1109/NUSOD.2014.6935385

Filename

6935385