Modeling of a long-period fiber-optic grating-assisted surface plasmon resonance refractive index sensor

Wenhua Wang; Weina Wu; Jiang Huang; Xiuyun Tian; Xianxiang Fei

doi:10.1117/12.2245928

4 November 2016 Modeling of a long-period fiber-optic grating-assisted surface plasmon resonance refractive index sensor

Wenhua Wang, Weina Wu, Jiang Huang, Xiuyun Tian, Xianxiang Fei

Author Affiliations +

Proceedings Volume 10025, Advanced Sensor Systems and Applications VII; 100251C (2016) https://doi.org/10.1117/12.2245928
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

A fiber-optic refractive index sensor assisted surface Plasmon resonance of metal dielectric layer around a longperiod fiber-optic grating with hollow fiber core has been proposed and comprehensively analyzed. Its operation principle is based on the efficient energy transfer between the fiber waveguide mode and the co-directional surface Plasmon waves excited with a long-period fiber-optic grating properly designed by the light refracted through the interface between the waveguide area and the metal dielectric film. The long-period fiber-optic grating is fabricated on a waveguide area of a specially designed fiber-optic with hollow fiber core. Simulations have been carried out in coupled mode theory of fiber-optic gratings in the wavelength ranges from 1500 to 1600nm, and for sensing characteristics of refractive index. Unlike a previous proposed fiber Bragg grating fabricated on this kind of fiber, t the sensitivity of the long-period fiber-optic grating SPR refractive index sensor is much higher than that of a FBG in the same structure. The proposed long-period fiber-optic refractive index sensor assisted surface Plasmon resonance is compact, light weight, and highly sensitive with a large sensing range

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Wenhua Wang, Weina Wu, Jiang Huang, Xiuyun Tian, and Xianxiang Fei "Modeling of a long-period fiber-optic grating-assisted surface plasmon resonance refractive index sensor", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100251C (4 November 2016); https://doi.org/10.1117/12.2245928

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KEYWORDS

Refractive index

Sensors

Fiber optics

Fiber optics sensors

Metals

Surface plasmons

Fiber Bragg gratings

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