Temperature sensing down to 4 K with erbium-doped tellurite glasses

0553524 - ÚFE 2023 RIV NL eng J - Journal Article
Yatskiv, Roman - Kostka, Petr - Grym, Jan - Zavadil, Jiří
Temperature sensing down to 4 K with erbium-doped tellurite glasses.
Journal of Non-Crystalline Solids. Roč. 575, Jan 1 (2022), č. článku 121183. ISSN 0022-3093. E-ISSN 1873-4812
R&D Projects: GA ČR(CZ) GA19-07456S
Institutional support: RVO:67985882 ; RVO:67985891
Keywords : Tellurite glasses * Optical temperature sensor * Rare earths * up-conversion luminescence * Low-temperature photoluminescence
OECD category: Optics (including laser optics and quantum optics); Materials engineering (USMH-B)
Impact factor: 3.5, year: 2022
Method of publishing: Limited access
https://doi.org/10.1016/j.jnoncrysol.2021.121183

Two binary tellurite glasses within TeO2-PbCl2-WO3 system with different concentrations of Er3+ ions were prepared by the conventional melt-quench technique and their optical properties were compared with emphasis on their potential use for temperature sensing starting from 4 K. Therefore, absorption and emission spectroscopy was used to determine the emission properties of Er3+ in the visible and near-infrared regions across a wide temperature range of 4-300 K. Photoluminescence emissions resulting from direct absorption or frequency up conversion were measured across a wide temperature range and their dependence on the concentration of erbium ions and on excitation power density were studied in detail. It was demonstrated that by optimizing concentration of erbium ions, the luminescence intensity ratio of suitably selected thermally coupled/uncoupled levels and their Stark sublevels can be used for the non-contact optical temperature sensing at cryogenic temperatures.
Permanent Link: https://hdl.handle.net/11104/0338896