Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 48-55 |
| Number of pages | 8 |
| Journal | Optical Fiber Technology |
| Volume | 41 |
| DOIs | |
| Publication status | Published - 2018 |
Fingerprint
Cite this
Detection of thermal gradients through fiber-optic Chirped Fiber Bragg Grating (CFBG): Medical thermal ablation scenario. / Korganbayev, Sanzhar; Orazayev, Yerzhan; Sovetov, Sultan; Bazyl, Ali; Schena, Emiliano; Massaroni, Carlo; Gassino, R.; Vallan, A.; Perrone, Guido; Saccomandi, Paola; Caponero, Michele Arturo; Iadicicco, Agostino; Tosi, Daniele.
In: Optical Fiber Technology, Vol. 41, 2018, p. 48-55.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Detection of thermal gradients through fiber-optic Chirped Fiber Bragg Grating (CFBG): Medical thermal ablation scenario
AU - Korganbayev, Sanzhar
AU - Orazayev, Yerzhan
AU - Sovetov, Sultan
AU - Bazyl, Ali
AU - Schena, Emiliano
AU - Massaroni, Carlo
AU - Gassino, R.
AU - Vallan, A.
AU - Perrone, Guido
AU - Saccomandi, Paola
AU - Caponero, Michele Arturo
AU - Iadicicco, Agostino
AU - Tosi, Daniele
PY - 2018
Y1 - 2018
N2 - In this paper, we describe a novel method for spatially distributed temperature measurement with Chirped Fiber Bragg Grating (CFBG) fiber-optic sensors. The proposed method determines the thermal profile in the CFBG region from demodulation of the CFBG optical spectrum. The method is based on an iterative optimization that aims at minimizing the mismatch between the measured CFBG spectrum and a CFBG model based on coupled-mode theory (CMT), perturbed by a temperature gradient. In the demodulation part, we simulate different temperature distribution patterns with Monte-Carlo approach on simulated CFBG spectra. Afterwards, we obtain cost function that minimizes difference between measured and simulated spectra, and results in final temperature profile. Experiments and simulations have been carried out first with a linear gradient, demonstrating a correct operation (error 2.9 °C); then, a setup has been arranged to measure the temperature pattern on a 5-cm long section exposed to medical laser thermal ablation. Overall, the proposed method can operate as a real-time detection technique for thermal gradients over 1.5–5 cm regions, and turns as a key asset for the estimation of thermal gradients at the micro-scale in biomedical applications.
AB - In this paper, we describe a novel method for spatially distributed temperature measurement with Chirped Fiber Bragg Grating (CFBG) fiber-optic sensors. The proposed method determines the thermal profile in the CFBG region from demodulation of the CFBG optical spectrum. The method is based on an iterative optimization that aims at minimizing the mismatch between the measured CFBG spectrum and a CFBG model based on coupled-mode theory (CMT), perturbed by a temperature gradient. In the demodulation part, we simulate different temperature distribution patterns with Monte-Carlo approach on simulated CFBG spectra. Afterwards, we obtain cost function that minimizes difference between measured and simulated spectra, and results in final temperature profile. Experiments and simulations have been carried out first with a linear gradient, demonstrating a correct operation (error 2.9 °C); then, a setup has been arranged to measure the temperature pattern on a 5-cm long section exposed to medical laser thermal ablation. Overall, the proposed method can operate as a real-time detection technique for thermal gradients over 1.5–5 cm regions, and turns as a key asset for the estimation of thermal gradients at the micro-scale in biomedical applications.
U2 - https://doi.org/10.1016/j.yofte.2017.12.017
DO - https://doi.org/10.1016/j.yofte.2017.12.017
M3 - Article
VL - 41
SP - 48
EP - 55
JO - Optical Fiber Technology
JF - Optical Fiber Technology
SN - 1068-5200
ER -