In recent decades, Fiber Bragg grating sensors (FBGs) found widespread acceptance in several biomedical applications thanks to their indisputable advantages. thermal ablation treatments (TATs) account for one of the fields where FBGs have gained large applicability for temperature measurements. The sensing element ength can affect the accuracy of the FBG measurement in this application. A longer length provides a more prominent peak in the FBG reflected spectrum, resulting o n a higher signal-to-noise ratio (SNR). A shorter FBG length implies a lower SNR but offers the benefits of better spatial resolution. Therefore, the choice of an adequate length can be crucial to minimize measurement errors, but the literature lacks exhaustive investigations on this parameter. The aim of our study is to supply additional knowledge about the effect of two different FBG lengths on temperature estimation in the presence of linear thermal gradients and with gradients mimicking the condition caused by TATs. In both cases, we compared the output of a 10 mm FBG with those of four FBGs 1 mm long, using a thermal camera as a reference instrument. Results suggest the better suitability of shorter sensors to retrieve thermal gradient information along their position instead of the longer FBG, which could lead to unacceptable measurement errors during TATs.

Fiber bragg gratings for temperature measurements under thermal gradients. Comparison between two different lengths / De Tommasi, Francesca; D’Alvia, Livio; Massaroni, Carlo; Lo Presti, Daniela; Carassiti, Massimiliano; Del Prete, Zaccaria; Schena, Emiliano; Palermo, Eduardo. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - 72:(2023). [10.1109/TIM.2023.3276511]

Fiber bragg gratings for temperature measurements under thermal gradients. Comparison between two different lengths

D’Alvia, Livio;Del Prete, Zaccaria;Palermo, Eduardo
2023

Abstract

In recent decades, Fiber Bragg grating sensors (FBGs) found widespread acceptance in several biomedical applications thanks to their indisputable advantages. thermal ablation treatments (TATs) account for one of the fields where FBGs have gained large applicability for temperature measurements. The sensing element ength can affect the accuracy of the FBG measurement in this application. A longer length provides a more prominent peak in the FBG reflected spectrum, resulting o n a higher signal-to-noise ratio (SNR). A shorter FBG length implies a lower SNR but offers the benefits of better spatial resolution. Therefore, the choice of an adequate length can be crucial to minimize measurement errors, but the literature lacks exhaustive investigations on this parameter. The aim of our study is to supply additional knowledge about the effect of two different FBG lengths on temperature estimation in the presence of linear thermal gradients and with gradients mimicking the condition caused by TATs. In both cases, we compared the output of a 10 mm FBG with those of four FBGs 1 mm long, using a thermal camera as a reference instrument. Results suggest the better suitability of shorter sensors to retrieve thermal gradient information along their position instead of the longer FBG, which could lead to unacceptable measurement errors during TATs.
2023
fiber bragg grating sensors; temperature measurements; thermal ablation treatments; thermal gradients
01 Pubblicazione su rivista::01a Articolo in rivista
Fiber bragg gratings for temperature measurements under thermal gradients. Comparison between two different lengths / De Tommasi, Francesca; D’Alvia, Livio; Massaroni, Carlo; Lo Presti, Daniela; Carassiti, Massimiliano; Del Prete, Zaccaria; Schena, Emiliano; Palermo, Eduardo. - In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. - ISSN 0018-9456. - 72:(2023). [10.1109/TIM.2023.3276511]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1679807
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