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D-shape polymer optical fibres for surface plasmon resonance sensing

K. Gasior T. Martynkien G. Wojcik P. Mergo W. Urbanczyk
Opto-Electronics Review | 2016 | vol. 24 | No 4 | 209-215
Keywords surface plasmons fibre optics sensors polymer waveguides
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Abstract

We experimentally studied three different D-shape polymer optical fibres with an exposed core for their applications as surface plasmon resonance sensors. The first one was a conventional D-shape fibre with no microstructure while in two others the fibre core was surrounded by two rings of air holes. In one of the microstructured fibres we introduced special absorbing inclusions placed outside the microstructure to attenuate leaky modes. We compared the performance of the surface plasmon resonance sensors based on the three fibres. We showed that the fibre bending enhances the resonance in all investigated fibres. The measured sensitivity of about 610 nm/RIUfor the refractive index of glycerol solution around 1.350 is similar in all fabricated sensors. However, the spectral width of the resonance curve is significantly lower for the fibre with inclusions suppressing the leaky modes.

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Authors and Affiliations

K. Gasior
T. Martynkien
G. Wojcik
P. Mergo
W. Urbanczyk

D-shape polymer optical fibres for surface plasmon resonance sensing

K. Gasior T. Martynkien G. Wojcik P. Mergo W. Urbanczyk
Opto-Electronics Review | 2017 | vol. 25 | No 1 | 1-5
Keywords Surface plasmons Fibre optics sensors Polymer waveguides
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Abstract

We experimentally studied three different D-shape polymer optical fibres with an exposed core for their applications as surface plasmon resonance sensors. The first one was a conventional D-shape fibre with no microstructure while in two others the fibre core was surrounded by two rings of air holes. In one of the microstructured fibres we introduced special absorbing inclusions placed outside the microstructure to attenuate leaky modes. We compared the performance of the surface plasmon resonance sensors based on the three fibres. We showed that the fibre bending enhances the resonance in all investigated fibres. The measured sensitivity of about 610 nm/RIU for the refractive index of glycerol solution around 1.350 is similar in all fabricated sensors. However, the spectral width of the resonance curve is significantly lower for the fibre with inclusions suppressing the leaky modes.

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Authors and Affiliations

K. Gasior
T. Martynkien
G. Wojcik
P. Mergo
W. Urbanczyk

Numerical simulations of a simple refractive index sensor based on side-hole optical fibres

Michał Dudek Kinga.K. Köllő
Opto-Electronics Review | 2022 | 30 | 4 | e143607 | DOI: 10.24425/opelre.2022.143607
Keywords fibre optic sensor finite-difference time-domain method numerical simulations refractive index side-hole optical fibre
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Abstract

In this work the influence of the cavity parameters on optical losses of a simple intensity-based in-line refractive index sensor utilizing a micromachined side-hole fibre was studied by means of numerical simulations. To perform these simulations, the Authors used the finite-difference time-domain method. The proposed sensor setup consists of light source, micromachined optical fibre as a sensor head, and a detector which makes it low-cost and easy to build. The changes of the external refractive index can be, therefore, recovered by direct measurements of the transmitted intensity from which insertion loss values can be calculated. By changing geometry of the cavity micromachined into the side-hole optical fibre, it was possible to determine its influence on the final sensor sensitivity and measurements range. Based on the provided analysis of simulations results, a simple fibre optic sensor can be fabricated mainly for sensing external liquids refractive index for application in biochemistry or healthcare.
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Authors and Affiliations

Michał Dudek
1
ORCID: ORCID
Kinga.K. Köllő
1
  1. Institute of Applied Physics, Military University of Technology, 2 gen. S. Kaliskiego St., 00-908 Warsaw, Poland

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