Growth and Spectral Properties of Nd∶CaYAlO4 Single Crystal Fibers

Abstract

Abstract: Nd∶CaYAlO₄ single crystal fibers with different atom number fraction (0.25%, 0.50%, 0.75%, 1.00%) were grown by the micro-pull-down method. The crystal structure of the single crystal fiber was tested by X-ray diffraction (XRD), and the results show that the crystal structure is tetragonal. The polarization absorption and fluorescence spectra of Nd∶CaYAlO₄ single crystal fibers were tested at room temperature, and the samples have strong absorption near 807 nm. Among them, the absorption of 1.00%Nd∶CaYAlO₄absorption is the strongest, and the absorption coefficients for σ and π polarization are 4.20 and 4.06 cm^-1, respectively. The strongest emission peaks of 1.00%Nd∶CaYAlO₄ single crystal fiber are at 1 080 nm in both σ and π polarization. The emission bandwidths are 17.7 and 17.8 nm for σ and π polarization, respectively. The fluorescence lifetime of 0.25%, 0.50%, 0.75% and 1.00%Nd∶CaYAlO₄ single crystal fibers are 129, 133, 135 and 140 μs, respectively, and no concentration quenching is observed. The results show that Nd∶CaYAlO₄ single crystal fiber is a potential gain medium for ultrafast lasers.

Key words: micro-pulling-down method, crystal fiber, Nd∶CaYAlO₄, crystal growth, spectral property

CLC Number:

TN253

GUO Jun, LIU Jian, CHEN Peng, SONG Qingsong, ZHANG Zhiheng, XU Xiaodong, XU Jun. Growth and Spectral Properties of Nd∶CaYAlO₄ Single Crystal Fibers[J]. Journal of Synthetic Crystals, 2023, 52(7): 1345-1351.

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Growth and Spectral Properties of Nd∶CaYAlO₄ Single Crystal Fibers

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