Growth and spectral characteristics of a new promising stoichiometric laser crystal: Ca9Yb(VO4)7 |
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作者姓名: | 吴辉 苑菲菲 孙士家 黄溢声 张莉珍 林州斌 王国富 |
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作者单位: | Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences;University of Chinese Academy of Sciences |
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基金项目: | Project supported by National Natural Science Foundation of China(61275177,61475158,51302260);National Natural Science Foundation of Fujian Province(2014H0052) |
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摘 要: | A Ca9Yb(VO4)7 crystal with dimensions of Φ23 mm×35 mm was grown successfully by Czochralski method. Its thermal conductivity was 1.06 W/(m?K) at room temperature. The absorption cross-sections at 980 nm were 1.80×10–20 cm2 and 1.28×10–20 cm2 for π- and σ- polarizations, respectively, with a full-width at half-maximum of 34 nm. The crystal had a broad emission at around 1025 nm with a full-width at half-maximum of 67 nm for π- polarization and 70 nm for σ- polarization. The emission cross-sections of the crystal were calculated by using reciprocity method and Füchtbauer-Ladenburg formula. The emission cross-sections at 1025 nm were 3.57×10–20 cm–2 and 1.91×10–20 cm–2 for π- and σ- polarization, respectively. The fluorescence lifetime was 332 μs. The results indicated that the crystal is a promising femtosecond and tunable laser material.
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关 键 词: | laser material crystal growth spectral characteristics Ca9Yb(VO4)7 crystal rare earths |
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