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Optical temperature sensing characteristics of Sm3+ doped YAG single crystal fiber based on luminescence emission.
- Source :
-
Journal of Alloys & Compounds . Jan2022, Vol. 890, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • YAG single crystal fiber with end Sm3+ doped was prepared by LHPG method. • Optimal doping concentration of the Sm3+ ions was investigated. • Optical temperature sensing characteristics of YAG: 0.5 mol%Sm3+ were investigated. • The proposed optical temperature sensor has a wide temperature range from 303 to 1178 K. A series of YAG: x mol%Sm3+ single crystal (SC) materials, in which x is 0.3, 0.5, 1, 2, respectively, have been synthesized through laser heated pedestal growth (LHPG) method. The down-conversion luminescence properties of prepared fluorescent materials were investigated under a 405 nm laser. According to the results, 0.5 mol% was selected as the optimal doping concentration, and the integrated YAG single crystal fiber (SCF) with end Sm3+ doped was further fabricated. Then the optical temperature sensing characteristics were studied by the technique of the fluorescence intensity ratio (FIR) in detail. It shows that 4F 3/2 and 4G 5/2 of Sm3+ ions are thermally coupled energy levels. The FIR of the 4F 3/2 /4G 5/2 → 6H 5/2 increases monotonously as temperature rises, and its temperature measurement range can be extended to 1178 K. The maximum absolute sensitivity and maximum relative sensitivity are 3.046 × 10−4 K−1(1129 K) and 5.033 × 10−3 K−1 (500 K), respectively. Additionally, the FIRs of various emission bands from 4G 5/2 → 6H 5/2, 7/2 and the FIR of the emission sub-bands from 4G 5/2 → 6H 9/2 exhibit temperature dependence in 303–1028 K and 303–878 K, respectively. These results indicate that YAG: Sm3+ SC is a very promising high-temperature sensing material. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 890
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 153286115
- Full Text :
- https://doi.org/10.1016/j.jallcom.2021.161844