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UV polymerization fabrication method for polymer composite based optical fiber sensors.

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Summary

This study introduces a new, low-cost 3D printing method for creating optical fiber sensors. These novel sensors use thermochromic pigments for accurate, remote temperature sensing in various applications.

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Area of Science:

  • Materials Science
  • Optical Engineering
  • Sensing Technology

Background:

  • Optical fiber (OF) sensors offer remote and robust sensing but face integration challenges.
  • Functional materials and micro/nanostructures are difficult to incorporate into OF systems due to compatibility and cost issues.

Purpose of the Study:

  • To demonstrate a novel, low-cost 3D printing process for fabricating stimuli-responsive optical fiber probe sensors.
  • To integrate thermochromic pigments into optical fibers for thermal sensing applications.

Main Methods:

  • Utilized a single droplet 3D printing process to incorporate thermochromic pigment micro-powders into UV-sensitive transparent polymer resins.
  • Additively manufactured thermally active polymer composite fibers onto commercial optical fiber tips.
  • Studied the thermal response of unicolor and dual-color pigment-based sensors in temperature ranges of (25-35 °C) and (25-31 °C).

Main Results:

  • Thermochromic optical fiber tip sensors showed significant reversible changes in transmission and reflection spectra with temperature variations.
  • Sensitivities of 3.5%/°C (blue), 3%/°C (red), and 1%/°C (orange-yellow) were achieved for unicolor sensors.
  • The fabricated sensors are cost-effective, reusable, and flexible, offering a simpler manufacturing process than conventional methods.

Conclusions:

  • The novel 3D printing approach enables the development of transparent, tunable thermochromic sensors for remote sensing.
  • This method allows for the integration of micro/nanostructures to enhance sensor sensitivity.
  • The developed optical fiber sensors show potential for remote temperature monitoring in biomedical and healthcare applications.