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Title: Investigation of the TeO2/GeO2 Ratio on the Spectroscopic Properties of Eu3+-Doped Oxide Glasses for Optical Fiber Application
Authors: Lesniak, Magdalena
Zeid, Jakub
Starzyk, Bartłomiej
Kochanowicz, Marcin
Kuwik, Marta
Zmojda, Jacek
Miluski, Piotr
Baranowska, Agata
Dorosz, Jan
Pisarski, Wojciech
Pisarska, Joanna
Dorosz, Dominik
Keywords: oxide glasses; TeO2/GeO2 molar ratios; DSC; Eu3+ structural and spectroscopic probe; structure; PLE; PL; PSB; R ratio; decay time
Issue Date: 2022
Citation: "Materials", 2022, iss. 1, art. no. 117, s. 1-23
Abstract: This study presented an analysis of the TeO2/GeO2 molar ratio in an oxide glass system. A family of melt-quenched glasses with the range of 0–35 mol% of GeO2 has been characterized by using DSC, Raman, MIR, refractive index, PLE, PL spectra, and time-resolved spectral measurements. The increase in the content of germanium oxide caused an increase in the transition temperature but a decrease in the refractive index. The photoluminescence spectra of europium ions were examined under the excitation of 465 nm, corresponding to 7F0 → 5D2 transition. The PSB (phonon sidebands) analysis was carried out to determine the phonon energy of the glass hosts. It was reported that the red (5D0 → 7F2) to orange (5D0 → 7F1) fluorescence intensity ratio for Eu3+ ions decreased from 4.49 (Te0Ge) to 3.33 (Te15Ge) and showed a constant increase from 4.58 (Te20Ge) to 4.88 (Te35Ge). These optical features were explained in structural studies, especially changes in the coordination of [4]Ge to [6]Ge. The most extended lifetime was reported for the Eu3+ doped glass with the highest content of GeO2. This glass was successfully used for the drawing of optical fiber.
DOI: 10.3390/ma15010117
ISSN: 1996-1944
Appears in Collections:Artykuły (WNŚiT)

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