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Updated: Jul 16, 2025

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Design of Surface Plasmon Resonance-Based D-Type Double Open-Loop Channels PCF for Temperature Sensing.

Shuangyan Gao1, Kaihua Wei2, Hua Yang3

  • 1Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China.

Sensors (Basel, Switzerland)
|September 9, 2023
PubMed
Summary

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This study introduces a novel D-type double open-loop channel fiber optic sensor for precise temperature sensing. The sensor achieves a high temperature sensitivity of 3757 pm/°C, offering significant potential for various monitoring applications.

Area of Science:

  • Photonics
  • Optical Sensing
  • Nanotechnology

Background:

  • Surface Plasmon Resonance (SPR) sensors are crucial for high-sensitivity detection.
  • Photonic Crystal Fibers (PCFs) offer unique light manipulation properties for sensor development.
  • Existing fiber optic temperature sensors have limitations in sensitivity and application scope.

Purpose of the Study:

  • To develop and characterize a novel D-type double open-loop channel SPR-PCF for enhanced temperature sensing.
  • To investigate the sensor's performance in terms of temperature and refractive index sensitivity.
  • To explore the potential applications of the developed sensor in geological, biological, and meteorological fields.

Main Methods:

  • Fabrication of a D-type PCF with grooves on polished surfaces, coated with a gold film.
Keywords:
Core-Metal-Analytesdouble open-loop channelssurface plasmon resonancetemperature sensing

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  • Design of a leakage window using air holes for efficient coupling of core mode energy with the gold film.
  • Utilizing the temperature-sensitive properties of Polydimethylsiloxane (PDMS) for sensing mechanism.
  • Experimental measurement of temperature and refractive index sensitivity.

    • Main Results:

    • Achieved a high temperature sensitivity of up to 3757 pm/°C within the 5 °C to 45 °C range.
    • Demonstrated a maximum refractive index sensitivity (RIS) of 4847 nm/RIU.
    • The sensor exhibits a simple nanostructure with robust sensing performance.

    Conclusions:

    • The developed SPR-PCF sensor offers improved performance for small-diameter fiber optic temperature sensing.
    • The sensor's high RIS and unique nanostructure present vast application prospects.
    • This technology can advance environmental monitoring, geological exploration, and biological sensing.