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Experimental analysis of overall thermal properties of Nd:La 2 CaB 10 O 19 crystals
Author(s) -
Zhang Jianxiu,
Wu Yang,
Zhang Guochun,
Li Yin,
Wu Yicheng
Publication year - 2012
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s002188981203974x
Subject(s) - thermal expansion , anisotropy , analytical chemistry (journal) , doping , materials science , thermal , boron , laser , mineralogy , chemistry , thermodynamics , optics , physics , optoelectronics , organic chemistry , chromatography , metallurgy
Pure or rare‐earth‐ion‐doped La 2 CaB 10 O 19 (LCB) is a promising optical material for nonlinear frequency conversion, laser and self‐frequency doubling applications. In this paper, the thermophysical properties of Nd 3+ ‐doped LCB (Nd:LCB) crystals were measured and compared with those of pure and of Yb 3+ ‐ and Er 3+ ‐doped LCB, as well as other borate nonlinear optical crystals. The melting points of rare‐earth‐doped LCB crystals are lower than that of pure LCB. Thermal expansion coefficients along the a , b , c , c *, a *, 〈110〉 and 〈110〉* directions have been measured, and the principal expansion coefficients were calculated to be 1.85 × 10 −6 , 4.13 × 10 −6 and 8.79 × 10 −6 K −1 . The measured specific heat of Nd:LCB is lower than that of pure LCB, resulting in a larger internal temperature gradient under irradiation by a pulsed laser beam. The measured thermal expansion anisotropy of Nd:LCB is stronger than that of pure LCB. The thermal conductivities of Nd:LCB along the c and c * directions are smaller than those along other crystallographic directions.