1. Examining the Spectroscopic and Thermographic Qualities of Er 3+ -doped Oxyfluoride Germanotellurite Glasses.
- Author
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Ryba-Romanowski, Witold, Komar, Jarosław, and Lisiecki, Radosław
- Subjects
ABSORPTION spectra ,RADIATIVE transitions ,MOLECULAR spectra ,QUANTUM efficiency ,BRANCHING ratios - Abstract
Novel ternary fluoro-germano-tellurite (GTS) glasses doped with Er
3+ ions with 0.5 mol% and 1.0 mol% were fabricated by a conventional melt and quenching method and investigated using methods of optical spectroscopy. The room-temperature absorption spectrum was recorded and analyzed to determine radiative transition rates, radiative lifetimes, and branching ratios of Er3+ luminescence. Decay curves of Er3+ luminesccence were recorded and analyzed. Temperature dependences of emission spectra and absorption spectra in the region from RT (room-temperature) up to 675 K were studied in detail. The contribution of competing radiative and nonradiative processes to the relaxation of luminescent levels of Er3+ was assessed. Absolute and relative sensitivity were established utilizing the comprehensive model based on thermally coupled2 H11/2 /4 S3/2 excited states of erbium. The high quantum efficiency of the first erbium-excited state and value of gain coefficient indicate that GTS:Er glass system can be considered as conceivable NIR (near infrared) laser material as well. [ABSTRACT FROM AUTHOR]- Published
- 2022
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