Thermal and laser properties of Nd:Lu3Sc1.5Ga3.5O12 for high power dual-wavelength laser

被引：12
作者：
Wu, K. [1 ]
Hao, L. Z. [1 ]
Yu, H. H. [1 ]
Wang, Z. P. [1 ]
Wang, J. Y. [1 ]
Zhang, H. J. [1 ]
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 07期
基金：
中国国家自然科学基金;
关键词：
CRYSTALS; ENHANCEMENT; GROWTH; YAG;
D O I：
10.1364/OE.20.006944
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We measured the thermal properties of Nd:Lu3Sc1.5Ga3.5O12 (Nd:LuSGG) crystal, including the thermal expansion coefficient, specific heat, and thermal diffusion coefficient. The calculated thermal conductivity is 4.4 W/mK at room temperature. A high-power continuous-wave and passively Q-switched Nd:LuSGG laser was also demonstrated. Continuous-wave output power of 6.96 W is obtained which is the highest power with this material. For the first time to our knowledge, the passively Q-switched Nd:LuSGG laser is reported with the shortest pulse width, largest pulse energy, and highest peak power are achieved to be 5.1 ns, 62.5 mu J, and 12 kW, respectively. By spectral analysis, it has been found that the Nd:LuSGG laser was located at 1059 nm under low pump power, and became dual-wavelength at 1061.5 and 1059 nm when the incident pump power is over 2.27 W. The generating mechanism of dual-wavelength laser is also discussed. (C) 2012 Optical Society of America
引用
收藏
页码：6944 / 6951
页数：8
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