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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

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Published on: January 7, 2019

Side-hole fiber sensor based on surface plasmon resonance.

Anna Wang1, Andrew Docherty, Boris T Kuhlmey

  • 11School of Physics, The University of Sydney, NSW, Australia 2006. annawang@physics.usyd.edu.au

Optics Letters
|December 18, 2009
PubMed
Summary

This study demonstrates surface plasmon resonance (SPR) in a novel microstructured optical fiber sensor. Researchers identified a new method to enhance the resolution of fiber SPR sensors for improved sensing applications.

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Area of Science:

  • Optoelectronics
  • Nanophotonics
  • Chemical Sensing

Background:

  • Surface plasmon resonance (SPR) is a label-free optical sensing technique.
  • Optical fiber sensors offer miniaturization and remote sensing capabilities.
  • Microstructured optical fibers provide unique light-matter interaction possibilities.

Purpose of the Study:

  • To demonstrate surface plasmon resonance (SPR) in a microstructured optical fiber for the first time.
  • To investigate the performance of the fiber SPR sensor with varying refractive index fluids.
  • To identify novel approaches for enhancing the resolution of fiber SPR sensors.

Main Methods:

  • Fabrication of a microstructured optical fiber.
  • Integration of a thin metal film for SPR excitation.
  • Characterization of SPR response using different refractive index analytes.
  • Analysis of spectral shifts to determine sensor performance.

Main Results:

  • Successful demonstration of SPR in the microstructured optical fiber sensor.
  • Observation of SPR features at specific wavelengths (560 and 620 nm) corresponding to refractive indices of 1.38 and 1.41.
  • Identification of a new method to improve sensor resolution.

Conclusions:

  • Microstructured optical fibers are suitable platforms for SPR sensing.
  • The developed sensor shows promise for detecting changes in refractive index.
  • The proposed method offers a pathway to significantly enhance the resolution of fiber SPR sensors.