Related Experiment Video
Updated: Aug 10, 2025
09:03
A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
7.2K
Spectral Analysis Methods for Improved Resolution and Sensitivity: Enhancing SPR and LSPR Optical Fiber Sensing
Paulo S S Dos Santos1,2, João P Mendes1,3,4, Bernardo Dias1,3
1INESC TEC-Institute for Systems and Computer Engineering, Technology and Science, Rua Dr. Alberto Frias, 4200-465 Porto, Portugal.
Sensors (Basel, Switzerland)
|February 11, 2023
Summary
This study enhances plasmonic optical fiber sensors by analyzing spectral features beyond peak shifts. This method improves sensing resolution up to 2.2x for both nanoparticle-doped and thin-film coated plasmonic optical fibers.
Area of Science:
- Nanophotonics
- Optical Sensing
- Biomedical Engineering
Background:
- Plasmonic sensors typically rely on surface plasmon resonance (SPR) peak shifts for detection.
- Previous research showed improved sensitivity and resolution using spectral features like inflection points and peak curvatures for gold nanoparticles on planar platforms.
- These advanced analysis methods were previously limited to planar surfaces and gold nanoparticles.
Purpose of the Study:
- To extend the analysis of spectral features beyond SPR peak shifts to plasmonic optical fibers.
- To investigate the applicability of differentiation methods for enhanced sensing resolution in plasmonic optical fiber sensors.
- To experimentally and theoretically evaluate optical responses of various plasmonic optical fiber configurations.
Main Methods:
- Experimental and theoretical investigation of optical responses from gold or silver nanosphere-doped optical fibers and continuous gold or silver thin-film coated optical fibers.
- Application of differentiation methods, including total variation regularization, to analyze spectral features.
- Noise reduction techniques to ensure accurate analysis of spectral data.
Main Results:
- Consistent resolution improvements of up to 2.2× were achieved for both nanoparticle-doped and thin-film coated plasmonic optical fibers.
- The study demonstrated the effectiveness of analyzing spectral inflection points and peak curvatures for enhanced sensing.
- Numerical and experimental results corroborated the proposed analysis methodology.
Conclusions:
- Advanced spectral analysis techniques significantly improve the sensing resolution of plasmonic optical fibers.
- The developed methodology is applicable to diverse plasmonic optical fiber sensor designs, including those with nanospheres and thin films.
- This approach offers a pathway to enhanced performance for a wide range of plasmonic optical fiber sensing applications.
