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Crystal growth and spectroscopic properties of Er3+-doped CaYAlO4

Authors

  • Dahua Zhou,

    1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, P. R. China
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  • Xiaodong Xu,

    Corresponding author
    1. Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, CAS, Shanghai 201800, P. R. China
    • Phone: +86-21-69987109, Fax: +86-21-59927184
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  • Xueyuan Chen,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, CAS, Fujian 350002, P. R. China
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  • Haomiao Zhu,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, CAS, Fujian 350002, P. R. China
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  • Dongzhen Li,

    1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, P. R. China
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  • Juqing Di,

    1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, P. R. China
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  • Changtai Xia,

    1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, CAS, Shanghai 201800, P. R. China
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  • Feng Wu,

    1. Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, CAS, Shanghai 201800, P. R. China
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  • Jun Xu

    1. Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, CAS, Shanghai 201800, P. R. China
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Abstract

A single crystal of 1% Er3+-doped CaYAlO4 has been grown by the traditional Czochralski method. The as-grown crystal showed optical transparency and developed two planes along the (001) direction. The absorption spectra showed a marked difference in the 4I15/2 → 4I13/2 and 4I15/2 → 4F9/2 transitions with different polarizing direction. Due to the disordered crystal structure, broad absorption, and emission spectra around 1550 nm were obtained. In our experiments, the lifetime of the 4I13/2 excited state of Er3+ was determined to be 3.46 ms by the powder method, while it was 4.95 ms in the bulk samples. In addition, the upconversion spectrum in the green and red regions was observed pumped by a laser diode (LD) at 970 nm.

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