Glass forming regions, structure and properties of lanthanum barium germanate and gallate glasses

Calzavara, Florian; Allix, Mathieu; Dussauze, Marc; Jubera, Véronique; Nalin, Marcelo; Cardinal, Thierry; Fargin, Evelyne

doi:10.1016/j.jnoncrysol.2021.121064

Cited by 23 publications

(16 citation statements)

References 36 publications

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“…From the experimental approach, it can be concluded the near-IR radiative transitions of lanthanide ions are greatly dependent on the reduction of matrix phonons to achieve high luminescence efficiency. Indeed, in the past few years, subsequent research on germanate glass remains a perspective option as an oxide glass host matrix for lanthanide ions thanks to its favorable properties, such as smaller multiphonon relaxation probabilities due to relatively low phonon energy (~800 cm −1 ), high transparency from the visible to the infrared region and presence of non-linear optical effects [ 21 , 22 ]. One should remember that the following lanthanides Ln 3+ ions such as Pr 3+ , Er 3+ , Tm 3+ , and Ho 3+ are proposed as co-activators for photoluminescence in Yb 3+ /Ln 3+ -doubly doped glasses owing to their favorable location of energy levels and the possibility of radiative transitions at the infrared [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

et al. 2022

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Inorganic glasses co-doped with rare-earth ions have a key potential application value in the field of optical communications. In this paper, we have fabricated and then characterized multicomponent TiO2-modified germanate glasses co-doped with Yb3+/Ln3+ (Ln = Pr, Er, Tm, Ho) with excellent spectroscopic properties. Glass systems were directly excited at 980 nm (the 2F7/2 → 2F5/2 transition of Yb3+). We demonstrated that the introduction of TiO2 is a promising option to significantly enhance the main near-infrared luminescence bands located at the optical telecommunication window at 1.3 μm (Pr3+: 1G4 → 3H5), 1.5 μm (Er3+: 4I13/2 → 4I15/2), 1.8 μm (Tm3+: 3F4 → 3H6) and 2.0 μm (Ho3+: 5I7 → 7I8). Based on the lifetime values, the energy transfer efficiencies (ηET) were estimated. The values of ηET are changed from 31% for Yb3+/Ho3+ glass to nearly 53% for Yb3+/Pr3+ glass. The investigations show that obtained titanate–germanate glass is an interesting type of special glasses integrating luminescence properties and spectroscopic parameters, which may be a promising candidate for application in laser sources emitting radiation and broadband tunable amplifiers operating in the near-infrared range.

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Section: Introductionmentioning

confidence: 99%

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

et al. 2022

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“…Secondly, a thorough analysis of the structural properties was performed by means of FT-IR and Raman spectroscopy. In those pioneering works, the properties of barium gallo-germanate systems were studied for possible applications in low-loss fiber optics and optical components [ 32 , 33 , 34 ]. The morphology of barium germanate glasses was reported by Shelby [ 35 ].…”

Section: Resultsmentioning

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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“…Naval Laboratory, germanium-gallium-barium (BGG) oxide glasses possess tremendous properties, including mid-IR transmission up to 6 microns, strong mechanical properties, and high glass transition temperature. [42,43] In this last decade, several research groups have already performed laser inscription in BGG glasses, proving the 3D fabrication of optical couplers or waveguides. [29,31,44] However, none of them have explored the potential of silver-doped BGG glasses for DLW.…”

Section: Introductionmentioning

confidence: 99%

Laser Direct Writing of Silver Clusters‐Based Subwavelength Periodic Structures Embedded in Mid‐Infrared Gallo‐Germanate Glass

Guerineau

Fargues

Lapointe

et al. 2022

Advanced Photonics Research

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Glass forming regions, structure and properties of lanthanum barium germanate and gallate glasses

Cited by 23 publications

References 36 publications

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

Near-IR Luminescence of Rare-Earth Ions (Er3+, Pr3+, Ho3+, Tm3+) in Titanate–Germanate Glasses under Excitation of Yb3+

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

Laser Direct Writing of Silver Clusters‐Based Subwavelength Periodic Structures Embedded in Mid‐Infrared Gallo‐Germanate Glass

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