Highly-sensitive fiber Bragg grating temperature sensors with metallic coatings

Wang, Xingyu; Sun, Xiaoyan; Hu, Youwang; Zeng, Li; Liu, Qishi; Duan, Ji-an

doi:10.1016/j.ijleo.2022.169337

Cited by 15 publications

(9 citation statements)

References 34 publications

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“…Researchers have also reported enhancements in the sensitivity of the sensor using polyimide adhesive coated on FBG [36]. They have shown that sensitivity is nearly equal to that of general FBG for a range of temperature around 250 • C [25,26]. In this paper, the transmitted Bragg wavelength shifts are determined with respect to temperature.…”

Section: Introductionmentioning

confidence: 92%

“…Since the surface plasmon resonances of noble metal nanoparticles are sensitive to external RI, these sensors have been widely adopted and applied in different fields for temperature measurements [23,24]. Hirayama et al have reported temperature sensing using FBG at around 250 • C, which was embedded in the conventional thermocouple housing [25,26]. The use of nanoparticles in scientific applications has attracted the research community over the past few years because of their different characteristic properties for better sensitivity [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Bendigeri,

Kulkarni,

Jadhav

et al. 2024

Meas. Sci. Technol.

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In the present report we demonstrate temperature sensing using fiber Bragg grating fixed on a Teflon substrate, which has a large thermal expansion coefficient. The significant enhancement in the sensitivity has been achieved by coating the fiber with green synthesized copper oxide nanoparticles characterized by UV-Visible spectroscopy, SEM, DSC and other techniques. The behavior of the coated material is unique in its response to the thermal stability based on mode of coating. We have explored the thermal response of FBG sensor mounted on the temperature unit on and after coating. The designed sensor is compact, cost effective and measures temperatures in the range of 25 0C to 200 0C. It has showed a linear relationship between wavelength shift and temperature change along with 0.59 pm / oC enhancement in the sensitivity. However, by optimizing the materials and physical dimensions of FBG, it is possible to increase the range of temperature detection thereby improving the performance of sensor. It is observed that sensitivity of the nanoparticles- coated FBG is better than that of the bare FBG for all ranges of temperature.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Bendigeri,

Kulkarni,

Jadhav

et al. 2024

Meas. Sci. Technol.

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“…Fiber Bragg grating (FBG) sensing technology has gained widespread application in temperature monitoring owing to its numerous advantages, including compact size, light weight, high precision, resistance to electromagnetic interference (EMI), and multiplexing capabilities. Depending on packaging forms, FBG-based temperature sensors can be broadly categorized into bare FBG sensor, tube-packaged FBG sensors [6][7][8], substrate-packaged FBG sensors [9], polymer-packaged FBG sensors [10], metal-coated FBG sensors [11][12][13][14], and sensitization structure-packaged FBG sensors [15]. Nonetheless, the primary objective of these packaging structures has been to enhance the temperature sensitivity of FBGs, rather than focusing on temperature measurement accuracy.…”

Section: Introductionmentioning

confidence: 99%

Theoretical error model of FBG-based surface temperature measurement and its accuracy enhancement

Jin,

Li,

Wang

et al. 2024

IEICE Electron. Express

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This paper aims to establish a mathematical error model for surface temperature measurement based on FBG and to enhance its measurement precision. Firstly, an improved temperature-sensing model for FBG was established. Subsequently, the mathematical model for FBG-based surface temperature measurement error was developed. The experiments were conducted using a controllable surface heat source. Experimental results demonstrate good consistency among the errors obtained from the mathematical model, the finite element model, and experimental testing. Finally, corrosion processing and thermally conductive silicone packaging methods were proposed, elevating the bare FBG's surface temperature measurement accuracy from approximately 4°C to approximately 1°C.

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“…In order to protect the FBG, a protective layer often needs to be added to the surface of the fiber optic. Typically, the FBG is protected with a polymer that coats the fiber, such as acrylate, polyimide, Teflon, PMMA, PEEK, and Ormocer [2]. However, most of them are viscoelastic materials, which would burn or melt at temperatures above 300 • C.…”

Section: Introductionmentioning

confidence: 99%

“…where n eff is the effective refractive index of the fiber [2]. The ∆λ B shift of the central wavelength (CWL) λ B depends on temperature.…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Aspects of Ni-Coating and High Temperature Treatments for FBG Spectrum Regeneration

et al. 2023

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The structural integrity of mechanical components is assessed by FBG sensors in many industrial fields. The FBG sensor has a relevant application at very high or low temperatures. To avoid the variability of the reflected spectrum and the mechanical properties degradation of the FBG sensor, metal coatings have been used to guarantee the grating’s integrity in extreme temperature environments. Particularly, at high temperatures, Ni could be a suitable selection as a coating to improve the features of FBG sensors. Furthermore, it was demonstrated that Ni coating and high-temperature treatments can recover a broken, seemingly unusable sensor. In this work, two main objectives were pursued: first, the determination of the best operative parameters to achieve the most compact, adherent, and homogeneous coating; second, the correlation between the obtained morphology and structure and the FBG spectrum modification, once Ni was deposited on the FBG sensor. The Ni coating was deposited from aqueous solutions. By performing heat treatments of the Ni-coated FBG sensor, it was investigated how the wavelength (WL) varied as a function of temperature and how that variation was caused by the structural or dimensional change of the Ni coating.

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Highly-sensitive fiber Bragg grating temperature sensors with metallic coatings

Cited by 15 publications

References 34 publications

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Biosynthesized CuO nanoparticles–coated grating sensors for temperature measurement

Theoretical error model of FBG-based surface temperature measurement and its accuracy enhancement

Metallurgical Aspects of Ni-Coating and High Temperature Treatments for FBG Spectrum Regeneration

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