1 中国科学院上海光学精密机械研究所强激光材料重点实验室， 上海 201800
2 中国科学院研究生院， 北京 100049
3 上海交通大学物理系， 上海 200240
选择中频电磁感应加热提拉法生长出了透明、基本无散射和气泡、无包裹物的高质量的铥(Tm)取代钇（Y）的原子数分数为2%的Tm:YLiF4（YLF），并采用X射线衍射（XRD）法对晶体进行了物相分析。测试TmYLF晶体的吸收光谱并计算了Tm离子对不同波长的吸收系数和吸收截面。同时测定其荧光光谱并分析了3H4－3F4和3F4－3H6跃迁产生的发射峰。对TmYLF晶体进行了激光实验，当输入功率为160 W时，获得了54.4 W的激光输出，斜率效率为35.6%，最大光光转换效率为31.2％。
材料 2 μm激光晶体 提拉法 激光输出
Author Affiliations
Abstract
1 Key Laboratory of Material Science and Technology for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China
3 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
LiLuF4 single crystals co-doped with thulium (5%) and holmium (0.5%), having large size, intact shape, and high optical quality, are successfully grown by the Czochralski technique. Absorption and fluorescence spectra of the crystal are measured. The absorption spectrum shows that the main absorption band locates at near 686 and 792 nm and the °uorescence spectrum peaks at 2.05 \mu m. At room temperature, the as-grown Tm, Ho: LiLuF4 single crystals are end-pumped by a fiber-coupled laser diode system with pumping wavelength of 795 nm under CW operations. A power of 50 mw continuous laser output at 2.05 \mu m wavelength is achieved. Meanwhile an obvious green light is detected.
Tm Ho:LuLF晶体 2μm激光 提拉法 上转换 160.3380 Laser materials 160.5690 Rare-earth-doped materials 160.4760 Optical properties 140.3380 Laser materials Chinese Optics Letters
2010, 8(1): 63
