Thermal Profile Detection Through High-Sensitivity Fiber Optic Chirped Bragg Grating on Microstructured PMMA Fiber

Sanzhar Korganbayev, Rui Min, Madina Jelbuldina, Xuehao Hu, Christophe Caucheteur, Ole Bang, Beatriz Ortega, Carlos Marques, Daniele Tosi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, a linearly chirped fiber Bragg grating (CFBG) inscribed in a microstructured polymer optical fiber (mPOF) has been demonstrated for detecting temperature profiles during thermal treatments. A CFBG of 10-mm length and 0.98-nm bandwidth has been inscribed in an mPOF fiber by means of a KrF laser and uniform phase mask. The CFBG has a high temperature sensitivity of-191.4 pm C. The CFBG has been used as a semidistributed temperature sensor, capable of detecting the temperature profile along the grating length, for scenarios that account minimally invasive biomedical treatments. Two experiments have been designed to validate the CFBG temperature reconstruction, using a linear gradient, and a research-grade radiofrequency ablation setup to apply Gaussian-shaped temperature spatial profiles. The result is that the higher sensitivity of the CFBG supports the detection of spatially nonuniform temperature fields by means of spectral reconstruction.

Original languageEnglish
Article number8428415
Pages (from-to)4723-4729
Number of pages7
JournalJournal of Lightwave Technology
Volume36
Issue number20
DOIs
Publication statusPublished - Oct 15 2018

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Keywords

  • Chirped FBG (CFBG)
  • distributed temperature sensor (DTS)
  • fiber Bragg grating (FBG)
  • optical fiber sensors
  • polymer optical fiber sensors
  • thermal ablation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Korganbayev, S., Min, R., Jelbuldina, M., Hu, X., Caucheteur, C., Bang, O., Ortega, B., Marques, C., & Tosi, D. (2018). Thermal Profile Detection Through High-Sensitivity Fiber Optic Chirped Bragg Grating on Microstructured PMMA Fiber. Journal of Lightwave Technology, 36(20), 4723-4729. [8428415]. https://doi.org/10.1109/JLT.2018.2864113