Study of fiber Bragg gratings with TiN-coated for cryogenic temperature measurement

Hsu, Ching-Yu; Chiang, Chia‐Chin; Hsieh, Tso-Sheng; Hsu, Hsiang-Cheng; Tsai, Liren; Hou, Chang-Hsiang

doi:10.1016/j.optlastec.2020.106768

Cited by 24 publications

(7 citation statements)

References 15 publications

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“…Metal coatings of high melting temperatures should be chosen to facilitate strain transfer and reduce thermal stress without being close to or exceeding the melting point of the fiber. Some metals with low melting points, such as In, Pb, and Sn, appear to perform better under cryogenic conditions than at high temperatures [ 37 , 38 ], whereas Ag and Au, which are hardly affordable, can withstand temperatures of up to 962 and 1064 °C, respectively. Otherwise, low-cost metals such as Cu and Ni have been thought to protect fibers at high temperatures due to their melting points being above 1000 °C.…”

Section: Introductionmentioning

confidence: 99%

FBG Spectrum Regeneration by Ni-Coating and High-Temperature Treatment

Lupi

Vendittozzi

Ciro

et al. 2022

Sensors

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FBG sensors are used in many scientific and industrial fields for assessing the structural integrity of mechanical components and in very high (above 600 °C) or very low (cryogenic) temperature applications. The main concerns with the use of such sensors in applications involving extreme temperatures are related partly to the instability of the reflected spectrum, which tends to dissolve into the noise floor, and partly to the degradation of the mechanical properties of the optical fiber, which tends to worsen the inherent brittleness. All of this raises the need for a robust nickel protective coating to ensure the grating’s integrity in high-temperature environments. In addition, the inherent brittleness of fiber-optic gratings leaves one to wonder whether it is possible to recover a broken, seemingly unusable sensor. In this way, a single-peak commercial FBG was intentionally broken in the middle of the grating length and re-spliced, inducing a strongly asymmetric chirped-like spectrum; then, a nickel coating was electrodeposited on its surface. The most important outcome achieved by this work is the regeneration of a highly distorted reflected spectrum through three thermal cycles performed from room temperature up to 500, 750, and 800 °C, respectively. After reaching a temperature of at least 700 °C, the spectrum, which has been drastically altered by splicing, becomes stable and restores its single peak shape. A further stabilization cycle carried out at 800 °C for 80 min led to an estimation of the stabilizing time of the new single-peak reflected spectrum.

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Section: Introductionmentioning

confidence: 99%

FBG Spectrum Regeneration by Ni-Coating and High-Temperature Treatment

Lupi

Vendittozzi

Ciro

et al. 2022

Sensors

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“…This optical sensor component can measure physical changes such as temperature, strain, pressure, displacement, force, and refractive index (Saktioto et al, 2021a). By utilizing a wide wavelength range, this component has a very high sensitivity, wide detection range, small size, and is resistant to electromagnetic wave interference (EM) (Korganbayev et al, 2018;Hsu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Dual-Polarized PCF-SPR Sensor for Alcohol Detection at Low Temperature

Azhar

2022

jppipa, pendidikan ipa, fisika, biologi, kimia

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We have observed a numerical simulation of the PCF-SPR sensor detecting alcohol concentration at low temperatures. The investigation was carried out using the finite element method on the PCF-SPR geometric structure. We use a simple geometry structure of the sensor by using fused silica and gold as the sensor’s core and plasmonic material. Observations were made in the alcohol concentration range of 15%, 40%, 60%, and 70%. In the literature, we find the refractive index of each alcohol concentration and input its value into the proposed sensor. The proposed sensor shows that the sensor has a sensitivity in detecting alcohol concentrations at low temperatures of 91 nm/%. In the end, we obtained the optimal sensor components and the sensor can detect the alcohol concentration at low temperatures

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“…Nevertheless, fiber Bragg gratings (FBGs) have been the most explored, despite showing low-temperature sensitivity below 100 K [ 14 , 15 ]. For this reason, several techniques have been applied in order to enhance their thermal sensitivity, such as the deposition of metal or sol–gel coatings on the fiber cladding or by embedding or bonding them to substrates with very different thermal expansion coefficients [ 16 , 17 , 18 , 19 ]. When compared to conventional FBGs, the fabrication of modified FBGs is time consuming and the temperature sensitivity improvement is limited [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

High Sensitivity Cryogenic Temperature Sensors Based on Arc-Induced Long-Period Fiber Gratings

Иванов

Caldas

Rego

2022

Sensors

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In this paper, we investigated the evolution of the dispersion curves of long-period fiber gratings (LPFGs) from room temperature down to 0 K. We considered gratings arc-induced in the SMF28 fiber and in two B/Ge co-doped fibers. Computer simulations were performed based on previously published experimental data. We found that the dispersion curves belonging to the lowest-order cladding modes are the most affected by the temperature changes, but those changes are minute when considering cladding modes with dispersion turning points (DTP) in the telecommunication windows. The temperature sensitivity is higher for gratings inscribed in the B/Ge co-doped fibers near DTP and the optimum grating period can be chosen at room temperature. A temperature sensitivity as high as −850 pm/K can be obtained in the 100–200 K temperature range, while a value of −170 pm/K is reachable at 20 K.

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Study of fiber Bragg gratings with TiN-coated for cryogenic temperature measurement

Cited by 24 publications

References 15 publications

FBG Spectrum Regeneration by Ni-Coating and High-Temperature Treatment

FBG Spectrum Regeneration by Ni-Coating and High-Temperature Treatment

Dual-Polarized PCF-SPR Sensor for Alcohol Detection at Low Temperature

High Sensitivity Cryogenic Temperature Sensors Based on Arc-Induced Long-Period Fiber Gratings

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