Spectral properties of Er-doped yttrium aluminum garnet crystals grown by modified horizontal directional crystallization method

Nizhankovskyi, S.V.; Kozlovskyi, A. A.; Kovalenko, Nazar O.; Kryvonogov, Serhii; Siryk, Yuriy

doi:10.15407/fm25.04.646

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…The refraction index of Er,Yb:YAG is 1.83. 1 The correspondence between the experimentally observed absorption lines and energy levels of Er 3+ in Er,Yb:YAG single crystal [11,[33][34][35][36] Wavelength/nm Assignment (from ground Fig. 6 illustrates the emission spectra of crystals excited at different wavelengths at room temperature, 382 nm for Fig.…”

Section: Resultsmentioning

confidence: 99%

Large-size Er,Yb:YAG Single Crystal: Growth and Performance

Zhiqiang¹,

Ji'an²,

Chen³

et al. 2023

Journal of Inorganic Materials

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Er 3+ and Yb 3+ co-doped YAG crystals are very important optical crystals. Currently, Er 3+ and Yb 3+ co-doped YAG crystals are widely used in high power solid state lasers, but there are still many challenges in growing large size, low defect doped YAG crystals using the Czochralski (Cz) method. In this paper, large-sized Er 3+ and Yb 3+ co-doped YAG bulk crystal with a diameter of 80 mm and a length of 230 mm has been obtained by the fast Cz growth method.

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Section: Resultsmentioning

confidence: 99%

Large-size Er,Yb:YAG Single Crystal: Growth and Performance

Zhiqiang¹,

Ji'an²,

Chen³

et al. 2023

Journal of Inorganic Materials

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Growth of YAG:Nd laser crystals by Horizontal Directional Crystallization in Protective Carbon‐Containing Atmosphere

Nizhankovskyi,

Romanenko,

Serdiuk

et al. 2024

Cryst. Res. Technol.

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Laser‐quality yttrium‐aluminum garnet single crystals doped with neodymium (YAG:Nd) of a concentration up to 1 at. % is grown by the method of horizontal directional crystallization from a molybdenum crucible in the protective reducing atmosphere based on argon, СО, and hydrogen. It is found that the content of carbon impurity in the grown crystals does not exceed 5·10−3 wt %, the content of molybdenum being on the level of 1.5·10−3 wt %. The optical quality of the crystals depends on the composition of the growth atmosphere and annealing. It is shown that, besides the bands of neodymium ion absorption, the crystals are characterized by the intense absorption in the UV edge of the spectrum at 370 nm wavelength, and by the wide absorption band with a maximum at 580 nm caused by formation of F and F+‐centers. The absorption at 370 and 580 nm can be eliminated by annealing. The structure perfection of the crystals is characterized by the rocking curve half‐width (β) which value varies within the limits of 10–14 arc. sec for (001) plane. Laser testing demonstrates the parameters comparable with those of YAG:Nd crystals grown by the Czochralski method from iridium crucible.

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