Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

Kang, Shiliang; Xiao, Xiudi; Pan, Qiwen; Chen, Dongdan; Qiu, Jianrong; Dong, Guoping

doi:10.1038/srep43186

Cited by 22 publications

(10 citation statements)

References 34 publications

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“…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 21–23 . However, to the authors knowledge, laser emission in bulk tellurite glass-ceramics has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

Nd3+-doped transparent tellurite ceramics bulk lasers

Dolhen

Tanaka

Couderc

et al. 2018

Sci Rep

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“…For the GPPr sample, the band centered in 552 cm –1 is related to bending and symmetric stretching vibration of the Ge–O–Ge of GeO 4 tetrahedral units. The band centered at 782 cm –1 corresponds to the convolution of stretching vibration modes of the Ge–O–Ge bond in GeO 6 octahedral units of germanium oxide, asymmetric stretching vibration Ge–O–Ge bridges connecting GeO 4 tetrahedral units, and antisymmetric bending vibration of the Pb–O–Pb bond in [PbO n ] units. ,− It was observed that the FTIR spectrum was not altered by the presence of Au NPs. After densification at 7.7 GPa, these bands shifted to lower energies, indicating an irreversible pressure-induced modification in the glass network.…”

Section: Resultsmentioning

confidence: 99%

Effect of High Pressure in the Luminescence of Pr³⁺-Doped Ge₂O–PbO Glass Containing Au Nanoparticles

Herrera

Balzaretti

2018

J. Phys. Chem. C

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In this paper, the combined effect of gold nanoparticles and high-pressure densification on the luminescence of Pr3+-doped heavy metal GeO2–PbO photonic glass was investigated. Localized states related to ion-trapped exciton defects, S1 and S2, were observed at 342 and 412 nm before densification. After densification under 7.7 GPa, the structure of the glass host changed irreversibly, as indicated by the infrared spectrum, refractive index, and density measurements. Transmission electron microscopy analyses indicated that the high-pressure densification induced the formation of clusters of gold nanoparticles. The modifications observed in the absorption and luminescence spectra of Pr3+ ions in the VIS–NIR range were associated to the changes in the local field surrounding the Pr3+ ions in the host glass induced by high pressure. For excitation at 445 nm (luminescence from 3P2) and 593 nm (luminescence from 1D2), the combined effect of densification and gold nanoparticles induced an increase in the emission band at 1050 cm–1. For excitation at 488 nm (luminescence from 3P0), the combined effect resulted in a strong decrease in the emission intensities in the VIS, revealing the emergence of nonradiative processes in resonance with 3P0 state. The observed behavior was probably due to energy transfer, ion trapped exciton defects, and cross-relaxation processes among the Pr3+ ions and gold nanoparticles.

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“…Zhou et al 24 demonstrated a significant improvement of the upconversion properties from Er 3+ -doped glass from the composition 70TeO 2 -15Li 2 O-15Nb 2 O 5 -0.5Er 2 O 3 (mol%) using a heat treatment at 440 • C during 5 h due to the precipitation of Li 75 Nb 1.75 Te 0.25 O 6 crystals. Kang et al 25 also demonstrated an enhancement in the intensity of the emission at 2.7 µm from Er 3+ -doped (59 10,20,30,40,50,59) after heat treatments between 400 and 610 • C for 8 h, due to the formation of lithium-and barium-based crystals. The glass with the composition 75TeO 2 -20ZnO-4Na 2 O-1Er 2 O 3 (mol%) was also reported to be promising as an enhanced intensity in the luminescence at 1.55 µm was reported after a heat treatment at 450 • C for 4 h due to the formation of Zn 2 Te 3 O 8 and Na 2 Zn 3 (CO 3 ) 4 .3H 2 O crystals.…”

Section: Introductionmentioning

confidence: 93%

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

et al. 2022

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In this paper, the structural, thermal, optical, and spectroscopic properties of Er 3+ -doped tellurite glasses with the composition 68.25TeO 2 -19.5ZnO-9.75X-2.5Er 2 O 3 (in mol%) with X = BaO, Na 2 O, and Bi 2 O 3 are reported. The glasses were prepared using the standard melt quenching method. The investigated glasses exhibit low phonon energy (∼745 cm −1 ) and low glass transition temperature varying between 300 and 350 • C depending on the glass composition. The Raman spectra show a regular tellurite structure with variations in the number of bridging and non-bridging oxygens depending on the glass composition, the Na 2 O and Bi 2 O 3 -containing glasses having the most and the least polymerized network, respectively. A thermal treatment of the glasses leads to the formation of crystals, the composition of which depends on the glass composition, as revealed by X-ray diffraction analysis and confirmed using scanning electron microscope-energydispersive spectroscopy. The precipitation of Er-containing crystals in the Na 2 O and BaO-containing glasses leads to an increase in the intensity of the upconversion emissions. Although the Er 3+ ions remain in the amorphous part of the Bi 2 O 3 -containing glass after heat treatment, it is the precipitation of Bi 3.2 Te 0.8 O 6.4 crystals in this glass, which is thought to decrease the distance between the Er 3+ ions leading to an increase in the intensity of the upconversion and mid-infrared emissions.

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Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

Cited by 22 publications

References 34 publications

Nd3+-doped transparent tellurite ceramics bulk lasers

Nd3+-doped transparent tellurite ceramics bulk lasers

Effect of High Pressure in the Luminescence of Pr³⁺-Doped Ge₂O–PbO Glass Containing Au Nanoparticles

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

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Spectroscopic properties in Er3+-doped germanotellurite glasses and glass ceramics for mid-infrared laser materials

Cited by 22 publications

References 34 publications

Nd3+-doped transparent tellurite ceramics bulk lasers

Nd3+-doped transparent tellurite ceramics bulk lasers

Effect of High Pressure in the Luminescence of Pr3+-Doped Ge2O–PbO Glass Containing Au Nanoparticles

Study of visible, NIR, and MIR spectroscopic properties of Er3+‐doped tellurite glasses and glass–ceramics

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Effect of High Pressure in the Luminescence of Pr³⁺-Doped Ge₂O–PbO Glass Containing Au Nanoparticles

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics