Study on the thermal and optical properties of Li+-modified Yb3+-doped Ca3Nb1.6875Ga3.1875O12 single crystal grown by the Bridgman method

IF 2.6 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

CrystEngComm Pub Date : 2025-08-20 DOI:10.1039/D5CE00356C

Lintao Zhou, Linwen Jiang, Zhigang Sun and Yanqing Zheng

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Abstract

Yb³⁺-doped Ca₃Nb_1.6875Ga_3.1875O₁₂ (Yb:CLNGG) crystals with structural disorder have widespread applications in laser fields. In this paper, we study the thermal and optical properties of Yb:CLNGG single crystals grown by the Bridgman method, as well as the structural and functional alterations induced by O₂-annealing and Ar-annealing treatments. The Yb:CLNGG crystals were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, transmission spectroscopy, and emission spectroscopy. The absorption cross section, emission cross section, and gain cross section of the Yb:CLNGG were calculated. The emission bandwidth of Yb:CLNGG was enhanced from 22 nm to 29 nm by annealing in the Ar environment and the luminescence lifetime was extended from 1.26 ms to 1.46 ms. The above results indicate that the performance of the Yb:CLNGG crystal is improved after annealing in Ar and it is a suitable material for ultrafast lasers.

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Bridgman法生长Li+修饰Yb3+掺杂Ca3Nb1.6875Ga3.1875O12单晶的热光学性质研究

Yb3+掺杂Ca3Nb1.6875Ga3.1875O12 （Yb:CLNGG）晶体结构无序，在激光领域有着广泛的应用。本文研究了Bridgman法生长的Yb:CLNGG单晶的热力学和光学性质，以及o2退火和ar退火处理引起的结构和功能变化。用拉曼光谱、x射线光电子能谱、透射光谱和发射光谱对Yb:CLNGG晶体进行了表征。计算了Yb:CLNGG的吸收截面、发射截面和增益截面。在氩气环境下退火后，Yb:CLNGG的发射带宽从22 nm增强到29 nm，发光寿命从1.26 ms延长到1.46 ms。上述结果表明，在氩气中退火后，Yb:CLNGG晶体的性能得到了改善，是一种适合超快激光器的材料。

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