Related references
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Review
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Summary: Optical temperature sensing technology based on Er3+, Yb3+ co-doped up-conversion luminescent materials has great potential in temperature detection. However, the high temperature phase and chemical stability of these materials, most of which are phosphors, still need further improvement. In this study, Er3+, Yb3+ co-doped LaBMoO6 single crystal is successfully synthesized and shows enhanced up-conversion performance compared to polycrystalline samples. A practical optical fiber type temperature sensor is fabricated using this single crystal as the luminescence sensing medium.
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Zhiyuan Yin et al.
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CERAMICS INTERNATIONAL
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Bo Hu et al.
Summary: In this study, Er3+/Yb3+-doped orthorhombic-phase BiNbO4 phosphors were synthesized and investigated as optical temperature sensors. The optimal doping concentrations were determined to be 3 mol.% Er3+ and 15 mol.% Yb3+. The material showed maximum absolute sensitivity (S-a) of 5.51‰/K at 415 K and relative sensitivity (S-r) of 3.7%/K at 150 K using the fluorescence intensity ratio technique.
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(2023)
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Summary: In this study, a novel strategy is proposed to enhance the low-temperature sensing properties by controlling the photochromic reaction process in Na0.5Bi2.5Ta2O9: Er/Yb samples. The maximum relative sensitivity reaches up to 5.99% K-1 at cryogenic temperature of 153 K, and after irradiation with a commercial laser of 405 nm for 30 s, the relative sensitivity is increased to 6.81% K-1. The improvement is attributed to the coupling of optical thermometric and photochromic behavior at elevated temperatures, offering a new avenue to improve the thermometric sensitivity in photo-stimuli response photochromic materials.
Article
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Fatemeh Rahimi et al.
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(2023)
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Bowen Chen et al.
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(2023)
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Adam Glowacz
Summary: This article presents a thermographic fault diagnosis technique for the shaft of a BLDC motor. The technique analyzes the shivering of the thermal imaging camera and uses deep neural networks for the analysis of faulty shafts. The proposed technique achieves excellent results with 100% recognition efficiency for four classes.
Article
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Jie Luo et al.
Summary: In this study, a series of TeO2-ZnO-ZnF2-La2O3-Yb2O3-Er2O3 glasses (TZL) were prepared and their spectroscopic properties, thermal behavior, and temperature sensing characteristics were investigated. The results showed that TZL glasses have potential applications as optical fiber temperature sensors.
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(2022)
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Yong Hu et al.
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Optics
Weijiang Xu et al.
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Tonglei Cheng et al.
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Yu Chen et al.
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INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
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Kai Yang et al.
Summary: An all-optical temperature sensor based on fluorescence intensity ratio was proposed for real-time monitoring of temperature in chemical reaction processes. The sensor probe was made of Er3+/Yb3+ co-doped glass and combined with an all-optical sensor system using a discharge melting method. The sensor demonstrated a maximum temperature sensitivity of 0.0067 K-1 and was successfully applied in an actual chemical reaction.
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