Cracking mechanism and spectral properties of Er,Yb:CaGdAlO<sub>4</sub> crystals grown by the LHPG method

Zhang, Na; Wang, Haoyuan; Yin, Yuqing; Wang, Tao; Jia, Zhitai; Zhang, Jian; Hu, Qiangqiang; Lin, Na; Fu, Xiuwei; Tao, Xutang

doi:10.1039/c9ce01688k

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…All samples have peaks at 257, 915, 965, and 1030 nm. Those at 915, 965, and 1030 nm result from splitting of the 2 F 5/2 energy state in the 2 F 7/2 to 2 F 5/2 transition in the Yb 3+ ion, − and the intensity in the 900–1000 nm range is proportional to the Yb 3+ content of the crystals. In contrast, the absorption at 257 nm represents the charge transfer transition from O 2p to Zr 4d.…”

Section: Resultsmentioning

confidence: 99%

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals

Cheng

Ren

Wang

et al. 2022

Crystal Growth & Design

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Large-size and high-quality stable ZrO 2 single crystals containing x mol % Yb 2 O 3 (x = 7, 8, 9, 10) (denoted as xYbSZ), and 8YbSZ crystals doped with 0.5 mol % Er 2 O 3 were grown by the optical floating zone (OFZ) method. Yb 3+ was indicated by XRD and Raman spectroscopy to have successfully entered into the ZrO 2 lattice, which was stabilized in the cubic phase when the concentration of Yb 2 O 3 was ≥8 mol %. Er 3+ successfully entered the 8YbSZ lattice, and its spectral absorption intensity was enhanced compared to Er 3+ in the corresponding yttria-stabilized zirconia (8YSZ), thus demonstrating that the Yb 3+ ion has an excellent sensitizing effect on the up-conversion luminescence of Er 3+ . Fluorescence decay curves show that the up-conversion luminescence excited state lifetime of Er 3+ is significantly enhanced in 8YbSZ compared to 8YSZ. Thus, these results demonstrate that Yb 3+ ions not only successfully stabilize ZrO 2 in the cubic phase structure but also maintain their role as an up-conversion luminescence sensitizer for Er 3+ ions.

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Section: Resultsmentioning

confidence: 99%

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals

Cheng

Ren

Wang

et al. 2022

Crystal Growth & Design

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“…At the same time, the doping concentration at the interface of different crystal bonding is almost mutated, which will affect laser oscillation and amplification . Preparing the crystal into a fiber shape, that is, single-crystal fiber, can also effectively increase the heat dissipation during the operation of the DPSSL. − …”

Section: Introductionmentioning

confidence: 99%

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

Dai

Dong

Zhang

et al. 2023

Crystal Growth & Design

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The thermal effect of a diode pumped solid-state laser mainly caused by nonuniform thermal distribution is the significant bottleneck limiting the output power achievable. In this work, a novel strategy to synthesize YAG crystal thin rods with a designable axial dopant gradient based on the laser-heated pedestal growth (LHPG) method was developed. To make the pump light uniformly absorbed through the whole rod, the optimal doping concentration profile along the axis of single-crystal rods (SCRs) was theoretically deduced. Finite element simulation results demonstrated that the Nd:YAG crystal thin rods with a designed dopant gradient can significantly reduce heat loads under laser operation. Using the grown gradient doped SCRs as a gain medium, the laser diode pumped continuous-wave laser at ∼1.06 μm was achieved with the highest slope efficiency of 44% and a maximum output power of 6.46 W. Under the same conditions, the slope efficiency of the uniformly doped SCRs was 38.7% and the maximum output power was 4.95 W. The results show that the SCRs with gradient dopants possess better thermal management and superior laser performance. Significantly, this method also provides a new idea for realizing the controllable distribution of doped ions in crystal growth.

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“…The laser-heated pedestal growth method (LHPG) utilizes a focused CO 2 laser beam to heat the source rods to form a melting zone; the fast crystal growth can be achieved when the oriented seed crystal touches the hemispherical melting zone. It can be used to obtain extremely high-melting materials and ultra fine crystal fibers [13,14].…”

Section: Introductionmentioning

confidence: 99%

The Growth and Spectroscopic Properties of Er, Nd: YSGG Single Crystal Fibers

Wu,

Wang,

Wang

et al. 2023

Crystals

Self Cite

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Single crystal fiber (SCF) is a novel solid gain medium and technique which combines the advantages of glass fiber and single crystal, showing great potential in the field of high-power lasers. In this paper, Er, Nd: YSGG single crystals with diameters of 2 mm and lengths of 80 mm were successfully grown using the micro-pulling-down method for the first time. Then, the measurements of Laue spots and Er3+ distribution indicated that the as-grown crystals were of a high quality. The effect of co-doped Nd3+ on the Er: YSGG was systematically discussed, which demonstrated that Nd3+ can decrease the fluorescence lifetime of Er: 4I13/2 that solve the self-termination bottleneck accordingly. These results demonstrate that Er, Nd: YSGG SCFs are promising materials for the further 3 μm laser generations.

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Cracking mechanism and spectral properties of Er,Yb:CaGdAlO₄ crystals grown by the LHPG method

Abstract: High quality Er,Yb:CaGdAlO4 (Er,Yb:CALGO) single crystals with a diameter around 1 mm were successfully grown and investigated for the first time by the laser heated pedestal growth (LHPG) method.

Cited by 9 publications

References 24 publications

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

The Growth and Spectroscopic Properties of Er, Nd: YSGG Single Crystal Fibers

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Cracking mechanism and spectral properties of Er,Yb:CaGdAlO4 crystals grown by the LHPG method

Abstract: High quality Er,Yb:CaGdAlO4 (Er,Yb:CALGO) single crystals with a diameter around 1 mm were successfully grown and investigated for the first time by the laser heated pedestal growth (LHPG) method.

Cited by 9 publications

References 24 publications

Effects of Yb2O3 as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO2 Single Crystals

Effects of Yb2O3 as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO2 Single Crystals

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

The Growth and Spectroscopic Properties of Er, Nd: YSGG Single Crystal Fibers

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Cracking mechanism and spectral properties of Er,Yb:CaGdAlO₄ crystals grown by the LHPG method

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals

Effects of Yb₂O₃ as Stabilizer and Sensitizer on the Luminescence Properties of Cubic ZrO₂ Single Crystals