Growth and Properties of Gd3+/Yb3+ Co-Doped Yttrium Aluminate Crystals

Abstract

Abstract: High-quality Gd³⁺/Yb³⁺ co-doped yttrium aluminate crystal was successfully grown by the Czochralski method. The crystal structure, segregation coefficient, spectrum and laser performance were characterized. The results show that the grown crystal space group is Pnma, which belongs to the orthorhombic system, and the segregation coefficient of Yb³⁺ is 1.13. According to the polarization absorption and fluorescence spectra, it is found that the absorption cross section of the crystal at 980 nm is 2.14×10^-20 cm² in the b polarization direction, which is suitable for InGaAs laser diode pumping. At the same time, the emission cross section at 1 044 nm is 0.39×10^-20 cm²and the fluorescence lifetime is 1.638 ms. In addition, a laser experiment was performed on the Gd/Yb∶YAP crystal in the b tangential direction, and the continuous laser output achieves at 1 μm, the slope efficiency is 23.5%, and the maximum output power reaches 0.51 W.

Key words: Gd/Yb:YAP crystal, Czochralski method, segregation coefficient, spectrum, laser output

CLC Number:

O782.5

TAN Huiyu, WANG Rui, ZHANG Peixiong, YIN Hao, LI Zhen, CHEN Zhenqiang. Growth and Properties of Gd³⁺/Yb³⁺ Co-Doped Yttrium Aluminate Crystals[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(11): 2013-2018.

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Growth and Properties of Gd³⁺/Yb³⁺ Co-Doped Yttrium Aluminate Crystals

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