Pan Zhongben, Cong Hengjiang, Yu Haohai, Tian Li, Yuan Hao, Cai Huaqiang, Zhang Huaijin, Huang Hui, Wang Jiyang, Wang Qing, Wei Zhiyi, Zhang Zhiguo
State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China.
Opt Express. 2013 Mar 11;21(5):6091-100. doi: 10.1364/OE.21.006091.
A novel disordered laser crystal Nd:Ca(3)La(2)(BO(3))(4) is characterized including its crystal growth, structure, thermal properties, inhomogeneously broadened spectra, and laser performance, which result that this crystal should be a promising gain material for the high-power ultrashort pulsed neodymium laser. The complete set of anisotropic thermal properties were systematically studied for the first time. It has been found that thermal contraction happens in the c direction and all the thermal conductivities increase with temperature, indicating a glass-like behavior. Polarized absorption and fluorescence spectra of Nd:Ca(3)La(2)(BO(3))(4) crystal were measured at 298.15 K and 77.3 K, respectively. The results show that both the absorption and the emission spectra of Nd(3+) have been inhomogeneously broadened, and thus it is very promising to be used in laser systems to produce femtosecond pulses. CW laser operations at 1.06 μm along the three crystallographic directions has been demonstrated for the first time. A maximum power of 1.08 W with an optical conversion efficiency of 10.6% and slope efficiency of 12.4% was achieved in the a-cut sample.
钙（3）镧（2）（硼酸盐）（4）被表征，包括其晶体生长、结构、热性能、非均匀展宽光谱和激光性能，这些结果表明该晶体应是高功率超短脉冲钕激光器的一种有前景的增益材料。首次系统地研究了该晶体完整的各向异性热性能。已发现沿c方向发生热收缩，并且所有热导率都随温度升高，表明具有类玻璃行为。分别在298.15K和77.3K下测量了钕：钙（3）镧（2）（硼酸盐）（4）晶体 的偏振吸收光谱和荧光光谱。结果表明，Nd（3 +）的吸收光谱和发射光谱均已发生非均匀展宽，因此它在用于产生飞秒脉冲的激光系统中非常有前景。首次证明了沿三个晶向在1.06μm处的连续波激光运转。在a切割样品中实现了1.08W的最大功率，光转换效率为10.6％，斜率效率为12.4％。
