Scalable and Formable Tellurite‐Based Transparent Ceramics for Near Infrared Applications

Ardouin, Bertrand; Carreaud, Julie; Chenu, Sébastien; Allix, Mathieu; Véron, Emmanuel; Duclère, Jean‐René; Launay, Yann; Hayakawa, Tomokatsu; Genevois, Cécile; Brisset, François; Célarié, Fabrice; Thomas, Philippe; Delaizir, Gaëlle

doi:10.1002/adom.201600230

Cited by 51 publications

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“…Although the refractive index of Al 2 O 3 (1.60) does not match that of YAG (1.82) 53 , the sample nanostructure enables high transparency to be retained during glass crystallization (the nanosize of both YAG and Al 2 O 3 grains minimizes light scattering according to the Rayleigh–Gans–Debye theory) 28 . The transmittance spectrum recorded in the UV–VIS–NIR and MIR regions is presented Fig.…”

Section: Resultsmentioning

confidence: 99%

“…This process, starting from a bulk glass precursor elaborated by fast and cost-efficient glass-forming process, can lead to large scale and shapeable transparent ceramics with high doping concentrations 27,28 . Recently, completely crystallized transparent aluminate ceramics, Sr 3 Al 2 O 6 23 and BaAl 4 O 7 24 , have been successfully prepared using such a bulk glass crystallization route.…”

Section: Introductionmentioning

confidence: 99%

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Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

et al. 2018

Nat Commun

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Transparent crystalline yttrium aluminum garnet (YAG; Y3Al5O12) is a dominant host material used in phosphors, scintillators, and solid state lasers. However, YAG single crystals and transparent ceramics face several technological limitations including complex, time-consuming, and costly synthetic approaches. Here we report facile elaboration of transparent YAG-based ceramics by pressureless nano-crystallization of Y2O3–Al2O3 bulk glasses. The resulting ceramics present a nanostructuration composed of YAG nanocrystals (77 wt%) separated by small Al2O3 crystalline domains (23 wt%). The hardness of these YAG-Al2O3 nanoceramics is 10% higher than that of YAG single crystals. When doped by Ce3+, the YAG-Al2O3 ceramics show a 87.5% quantum efficiency. The combination of these mechanical and optical properties, coupled with their simple, economical, and innovative preparation method, could drive the development of technologically relevant materials with potential applications in wide optical fields such as scintillators, lenses, gem stones, and phosphor converters in high-power white-light LED and laser diode.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

et al. 2018

Nat Commun

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152

115

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“…In our previous work 26 , a large (60 mm in diameter) undoped tellurite glass sample was heat treated at 510 °C for 1 h30, leading to a fully ceramized and optically transparent sample. In the current work, the dwelling time at 510 °C was adapted and drastically shortened (5 or 15 min) mostly due to the strongly reduced size of the sample (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Experiments were conducted as a function of time, at a temperature T = 510 °C (temperature based on our previous work 26 ).…”

Section: Methodsmentioning

confidence: 99%

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Nd3+-doped transparent tellurite ceramics bulk lasers

Dolhen

Tanaka

Couderc

et al. 2018

Sci Rep

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We report on the laser emission of the polycrystalline ceramic obtained from the full and congruent crystallization of the parent glass 1Nd 3+ :75TeO 2 -12.5Bi 2 O 3 -12.5Nb 2 O 5 composition. In particular, the current work underlines the importance of carefully controlling the heat treatment in order to solely crystallize the Bi 0.8 Nb 0.8 Te 2.4 O 8 cubic phase and consequently avoid the formation of the BiNbTe 2 O 8 orthorhombic phase that would be detrimental for optical purpose. The structure, microstructure and photoluminescence properties of the resulting transparent tellurite ceramics are characterized. The continuous-wave and gain-switching laser performances reveal that the emission remains perfectly single transversal mode in the range of pump powers explored. The maximum output power achieved was ~28.5 mW, for a pump power threshold of ~67 mW, and with associated efficiency and slope efficiency of ~22.5% and ~50%, respectively. These data definitely stand among the best results obtained so far for bulk laser tellurite materials and thus demonstrate the potential of such polycrystalline transparent ceramics as optically active materials. Finally, the laser emission characteristics in pulsed regime, at low and high repetition rates, are also provided: more than 6.5 W of peak power at a repetition rate of 728 kHz can be obtained.Tellurite based-glasses present numerous advantages, such as a large transparency window up to ~6 µm, a rather low melting point and excellent third-order non-linear optical properties . These are key parameters which will favour radiative transitions, further permitting laser emission.So far, all the literature dedicated to tellurite bulk lasers is still rather scarce, as it was recently reviewed in 5, and most of all, is limited to bulk glass lasers [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] . The most convenient way to sort all these contributions remains to classify them into three categories, which find their origin from the nature of the rare earth ions employed. Hence, papers dealing with Nd 3+ -doped tellurite glass bulk lasers are the most abundant 6-15 : except one of them which treats the lasing properties at 1.37 μm, they are all related to laser emission around 1064 nm. Then, one can find articles reporting on Ho 3+ -doped, Tm 3+ -doped and also Tm 3+ -Ho 3+ co-doped tellurite glasses for laser emission around 2 μm [16][17][18][19] . Finally, the last category regroups papers focused on Yb 3+ -doped tellurite glasses, emitting in the 0.9-1.1 μm range, like in 20 .Besides that, there is some important and recent research activity concentrated on the study of the optical properties of tellurite glass-ceramics, considered as promising materials for lasers, especially in the near and mid-infrared [21][22][23] . However, to the authors knowledge, laser emission in bulk tellurite glass-ceramics has not yet been reported.On another hand, a very interesting and innovative way of producing some transparent ceramics is the full congruent crystallization met...

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Influence of Ho₂O₃ on Optimizing Nanostructured Ln₂Te₆O₁₅Anti‐Glass Phases to Attain Transparent TeO₂‐Based Glass‐Ceramics for Mid‐IR Photonic Applications

et al. 2020

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The transparent TeO2‐based glass‐ceramics (GCs) have yet to achieve the breakthrough in photonic technologies, because of poor understanding in optimizing the growth of nanostructured crystalline phases. In the present investigation, the size effect of phase‐separation‐induced, nanostructured Ln2Te6O15‐based (Ln: Gd, Ho) “anti‐glass” phase in Ho2O3‐modified TeO2‐based TTLG (in mol%, 80TeO210TiO25La2O35Gd2O3) glass has considered to achieve transparent GCs. Raman study of TTLG glass reveals the presence of TeO3, TeO3 + 1, and TeO4 units with average TeO coordination number as 3.49. The formation of nanostructured Ln2Te6O15 phases in GCs is confirmed by X‐ray diffraction (XRD) and transmission electron microscopy (TEM) analysis. Furthermore, TEM analysis confirms that an increase of Ho2O3 concentration has reduced the size of phase‐separated domains in nanoscale with superstructure formation to attain transparent GCs. The superiority of this obtained transparent GCs as photonic material for near‐IR (NIR) to mid‐IR (MIR) range has been established by the realization of enhanced luminescence intensities and bandwidth at ≈2900 nm (Ho3+: 5I6 → 5I7) and ≈2050 nm (Ho3+: 5I7 → 5I8). This study offers an opportunity to fabricate the various accessible lanthanide ions‐doped and/or co‐doped TTLG glass with control over nanostructure, to design a series of GCs which are transparent from visible to MIR range.

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Scalable and Formable Tellurite‐Based Transparent Ceramics for Near Infrared Applications

Cited by 51 publications

References 32 publications

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Nd3+-doped transparent tellurite ceramics bulk lasers

Influence of Ho₂O₃ on Optimizing Nanostructured Ln₂Te₆O₁₅Anti‐Glass Phases to Attain Transparent TeO₂‐Based Glass‐Ceramics for Mid‐IR Photonic Applications

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Scalable and Formable Tellurite‐Based Transparent Ceramics for Near Infrared Applications

Cited by 51 publications

References 32 publications

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Pressureless glass crystallization of transparent yttrium aluminum garnet-based nanoceramics

Nd3+-doped transparent tellurite ceramics bulk lasers

Influence of Ho2O3 on Optimizing Nanostructured Ln2Te6O15Anti‐Glass Phases to Attain Transparent TeO2‐Based Glass‐Ceramics for Mid‐IR Photonic Applications

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Influence of Ho₂O₃ on Optimizing Nanostructured Ln₂Te₆O₁₅Anti‐Glass Phases to Attain Transparent TeO₂‐Based Glass‐Ceramics for Mid‐IR Photonic Applications