光学学报, 2002, 22 (4): 501, 网络出版: 2006-08-08
Yb:YAG晶体的热学性质及其对激光性能的影响
Thermal Properties of Yb:YAG Crystal and Its Influence on Laser Properties
质量热容 热扩散率 热导率 激光性能 Yb:YAG Yb∶YAG massic heat capacity thermal diffusivity thermal conductivity laser performance
摘要
对于中频感应加热提拉法(Czochralski Method)生长的高掺杂浓度(原子数分数0.30)Yb:YAG晶体,经退火后采用差示扫描量热计法测量了晶体的比热容,通过激光脉冲法测量了不同掺杂浓度(原子数分数0.05～0.30Yb:YAG晶体的热扩散率和热导率.实验表明,随着Yb3+离子浓度增加,Yb:YAG晶体在300 K温度下的导热性能有明显的降低.原子数分数为0.30的Yb:YAG晶体的激光实验表明,高掺杂浓度Yb:YAG晶体热导率的降低导致了激光阈值的增加.
Abstract
The highly doped Yb∶YAG (fraction of atomic number 0.30) laser crystals are grown by Czochralski method heated by medium frequency induction. After annealing, the specific heat capacity of Yb∶YAG single crystals is measured by the means of differential scanning calorimetric method (DSC), and the thermal conductivity and diffusivity of Yb∶YAG crystal with different doping concentrations (fraction of atomic number 0.05～0.30) is obtained by the pulsed laser technique. The experiments suggest that at room temperature (300 K), thermal conductivity of Yb∶YAG crystals decreases greatly with increasing Yb 3+ content in the crystals. The experiments of laser performance of highly doped Yb∶YAG (fraction of atomic number 0.30) crystals show that, the low thermal conductivity in the highly doped Yb∶YAG crystals leads to high threshold for lasing.
邱宏伟, 杨培志, 赵广军, 邓佩珍, 徐军, 陈伟. Yb:YAG晶体的热学性质及其对激光性能的影响[J]. 光学学报, 2002, 22(4): 501. 邱宏伟, 杨培志, 赵广军, 邓佩珍, 徐军, 陈伟. Thermal Properties of Yb:YAG Crystal and Its Influence on Laser Properties[J]. Acta Optica Sinica, 2002, 22(4): 501.
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