Anisotropy of thermal and spectral characteristics in Tm:YAP laser crystals

被引：47

作者：

Lu, Yanling ^{[1
]}

Dai, Yongbing ^{[1
]}

Yang, Yang ^{[1
]}

Wang, Jun ^{[1
]}

Dong, Anping ^{[1
]}

Sun, Baode ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 453卷 / 1-2期

关键词：

optical materials; Tm : YAP laser crystal; anisotropy; thermal expansion coefficient; optical spectroscopy;

D O I：

10.1016/j.jallcom.2006.11.178

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermal expansion coefficients along three main crystallographic axes of Tm-doped YAlO3 (Tm:YAP) single crystals were investigated in the temperature range of 30-1350 degrees C, and the results showed that they are 11.9458, 5.0012 and 10.5439 x 10(-6) K-6, respectively. Polarized absorption and fluorescence spectra of Tm: YAP crystals in a-c directions were measured. The absorption cross sections near 794 nm are 8.64, 9.22 and 6.80 x 10(-21) cm(2), respectively. According to the fluorescence spectra, the b-axis emission cross section at 1.86 is determined to be 4.33 x 10(-21) cm(2), larger than those along two other axes. The results above showed that the anisotropy effect of thermal and optical characteristics exists in Tm:YAP crystal and b orientation is the preferred one. The origin and peculiarities of anisotropy were investigated and discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：482 / 486

页数：5

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