Spectroscopic properties of gallium-rich germano-gallate glasses doped with Tm3+

Falci, Rodrigo Ferreira; Guerineau, Théo; Delarosbil, Jean-Luc; Messaddeq, Younès

doi:10.1016/j.jlumin.2022.119014

Cited by 24 publications

(3 citation statements)

References 39 publications

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“…This calculation procedure with the host insensitive reduced matrix elements

{\| {{U}^t} \|}^2

taken from Carnall et al 37 . was applied for several glass systems doped with Pr 3+ and Tm 3+ ions 39–43 . Next, the experimental and theoretical oscillator strengths were compared.…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions

et al. 2023

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Near‐infrared luminescence of Pr3+ and Tm3+ ions in titanate‐geramanate glasses have been studied for laser and fiber amplifier applications. The effect of the molar ratio GeO2:TiO2 (from 5:1 to 1:5) on spectroscopic properties of glass systems was studied by absorption, luminescence measurements, and theoretical calculations using the Judd‐Ofelt theory. It was found that independently of the TiO2 concentration, intense near‐infrared emissions at 1.5 μm and 1.8 μm were observed for glasses doped with Pr3+ and Tm3+ ions, respectively. Moreover, several spectroscopic and near‐infrared (NIR) laser parameters for Pr3+ and Tm3+ ions, such as emission bandwidth, stimulated emission cross‐section, quantum efficiency, gain bandwidth, and figure of merit, were determined. The results were discussed in detail and compared to the different laser glasses. Systematic investigations indicate that Pr3+‐doped system with GeO2:TiO2 = 2:1 and Tm3+‐doped glass with GeO2:TiO2 = 1:2 present profit laser parameters and could be successfully applied to near‐infrared laser and broadband optical amplifiers.This article is protected by copyright. All rights reserved

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“…This calculation procedure with the host insensitive reduced matrix elements

{\| {{U}^t} \|}^2

taken from Carnall et al 37 . was applied for several glass systems doped with Pr 3+ and Tm 3+ ions 39–43 . Next, the experimental and theoretical oscillator strengths were compared.…”

Section: Resultsmentioning

confidence: 99%

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions

et al. 2023

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“…First observed by Ivanov and Evstropiev [ 19 ], the coordination of Ge would continuously change from GeO 4 to GeO 6 with the addition of alkali oxides. Recently, the structural properties of germanate-based glasses have been examined in Na 2 O-GeO 2 -TeO 2 [ 20 ], Li 2 O-GeO 2 -TeO 2 [ 20 ], MnO-GeO 2 -PbO 2 [ 21 ], TeO 2 -GeO 2 -PbO [ 22 ], Na 2 CO 3 -CaO-GeO 2 [ 23 ], and Ga 2 O 3 -GeO 2 -BaO [ 24 ]. Among the reported germanate-based glasses, the barium gallo-germanate matrix has received the most attention due to its excellent properties, i.e., relatively large glass-forming region, high transmittance in a wide wavelength region, superior chemical durability, and thermal stability [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

et al. 2023

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Modified barium gallo-germanate glass hosts are still worthy of attention in studying structure–property relationships. In this work, two different series of glass systems based on (60-x)GeO2-xTiO2-30BaO-10Ga2O3 and (60-x)GeO2-xB2O3-30BaO-10Ga2O3 (x = 10, 30, 50 mol%) were synthesized, and their properties were studied using spectroscopic techniques. X-ray diffraction (XRD) patterns revealed that all fabricated glasses were fully amorphous material. The absorption edge shifted toward the longer wavelengths with a gradual substitution of GeO2. The spectroscopic assignments of titanium ions were performed with excitation and emission spectra compared to the additional sample containing an extremely low content of TiO2 (0.005 mol%). On the basis of Raman and FT-IR investigations, it was found that increasing the TiO2 content caused a destructive effect on the GeO4 and GeO6 structural units. The Raman spectra of a sample containing a predominantly TiO2 (50 mol%) proved that the band was located near 650 cm−1, which corresponded to the stretching vibration of Ti-O in TiO6 unit. The deconvoluted IR results showed that the germanate glass network consisted of the coexistence of two BO3 and BO4 structural groups. Based on the experimental investigations, we concluded that the developed materials are a promising candidate for use as novel glass host matrices for doping rare-earth and/or transition metal ions.

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“…In the meantime, gallium-rich, namely gallate, BGG glasses (GaO 3/2 /GeO 2 ratio in mol% larger than 1) have attracted significant attention, since their thermal, optical and mechanical properties are even superior to those of germanate-based BGG compositions (GaO 3/2 /GeO 2 ratio in mol% smaller than 1). Indeed, the substitution of Ge 4+ for Ga 3+ ions increases both optical transmission window up to 6.0 μm and Knoop micro-hardness up to 5.4 GPa, while the solubility of rare-earth ions remains high (more than 10 mol%) 5 , 20 , 21 .…”

Section: Introductionmentioning

confidence: 99%

Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers

Guerineau

Aouji

Morency

et al. 2023

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The development of efficient and compact photonic systems in support of mid-infrared integrated optics is currently facing several challenges. To date, most mid-infrared glass-based devices are employing fluoride or chalcogenide glasses (FCGs). Although the commercialization of FCGs-based optical devices has rapidly grown during the last decade, their development is rather cumbersome due to either poor crystallization and hygroscopicity resilience or poor mechanical-thermal properties of the FCGs. To overcome these issues, the parallel development of heavy-metal oxide optical fiber from the barium-germanium-gallium oxide vitreous system (BGG) has revealed a promising alternative. However, over 30 years of fiber fabrication optimization, the final missing step of drawing BGG fibers with acceptable losses for meters-long active and passive optical devices had not yet been reached. In this article, we first identify the three most important factors that prevent the fabrication of low-loss BGG fibers i.e., surface quality, volumic striae and glass thermal-darkening. Each of the three factors is then addressed in setting up a protocol enabling the fabrication of low-loss optical fibers from gallium-rich BGG glass compositions. Accordingly, to the best of our knowledge, we report the lowest losses ever measured in a BGG glass fiber i.e., down to 200 dB km−1 at 1350 nm.

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Spectroscopic properties of gallium-rich germano-gallate glasses doped with Tm3+

Cited by 24 publications

References 39 publications

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers

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Spectroscopic properties of gallium-rich germano-gallate glasses doped with Tm3+

Cited by 24 publications

References 39 publications

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr3+ and Tm3+ ions

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr3+ and Tm3+ ions

Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B2O3/TiO2

Toward low-loss mid-infrared Ga2O3–BaO–GeO2 optical fibers

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Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions

Experimental and theoretical studies on NIR luminescence of titanate‐germanate glasses doped with Pr³⁺ and Tm³⁺ ions