Growth, Spectroscopic Characteristics and Laser Potential
of Yb³⁺:Ca₃La₂(BO₃)₄ Crystal¹

Y. Q. Wang^{a, b}, Y. Wang^a, C. L. Sun^{a, b}, Y. X. Ji^{a, b}, and C. Y. Tu^a, *

^a Key Laboratory of Optoelectronic Materials Chemistry and Physics of CAS,
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences,
Fuzhou City, Fujian Province, 350002 China

^b Graduate School of Chinese Academy of Sciences, Beijing City, 100039 China

*e-mail: tcy@ms.fjirsm.ac.cn

Received January 13, 2012; published online May 11, 2012

Abstract—Crystal of Yb³⁺-doped Ca₃La₂(BO₃)₄ has been grown by the Czochralski technique. The room tem-
perature absorption and fluorescence spectra of the crystal have been investigated. The result showed that this
crystal exhibits broad absorption and emission with the FWHM of 11 nm at 978 nm and 66 nm FWHM at 1025
nm, respectively. The stimulated emission cross-section of Yb³⁺ ions were calculated using the reciprocity
method and Fuchtbauer–Ladenburg method, respectively. The room temperature fluorescence decay curves of
²F_5/2 manifold of Yb³⁺ ions were recorded for both crystal and powder samples. The effect of radiation tapping
on the spectroscopic properties is discussed. The result that the lifetime of the powder sample is shorter than
that of the bulk sample demonstrates the existence of radiation trapping effect. The laser potentiality was also
evaluated and the results show that this crystal is a good candidate for tunable and ultrashort pulse lasers.

DOI: 10.1134/S1054660X12060151

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