期刊
JOURNAL OF LUMINESCENCE
卷 155, 期 -, 页码 101-107出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2014.06.010
关键词
Optical materials; Crystal growth; Optical properties; Luminescence
类别
资金
- National Natural Science Foundation of China [61078054]
- Science and Technology Commission of Shanghai Municipality [13111103700]
- Science and Technology Innovation Project of Shanghai Institute of Ceramics, Chinese Academy of Sciences [Y24ZC5150G]
Growth of Tm, Ho doped and Tm, Ho co-doped CaGdAlO4 crystals by Czochralski method are investigated for the first time. Tm:CaGdAlO4 crystal without any crack was obtained. The segregation coefficient and XRD were detected and the results revealed that the cell parameters decreased with increasing of the doping concentration. The absorption spectra, J-O parameters, emission spectra and fluorescence lifetime of were discussed. The absorption cross sections were calculated to be 0.61 x 10(-20) cm(2) and 1.49 x 10(-20) cm(2) at 793 nm and 798 nm for a polarization and c polarization of Tm:CaGdAlO4 crystal, and the stimulated emission cross-section was calculated to be 0.36 x 10(-20) cm(2) at 1762 nm. The stimulated emission cross-section of Ho:CaGdAlO4 crystal was calculated to be 1.18 x 10(-20) cm(2) at 2002 nm. The width of Tm,Ho:CaGdAlO4 emission band is almost 600 nm. The results show that Tm:CaGdAlO4, Ho:CaGdAlO4 and Tm,Ho:CaGdAlO4 crystals were excellent potential ultrafast laser media. (C) 2014 Elsevier B.V. All rights reserved.
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