Su Liangbi, Guo Xinsheng, Jiang Dapeng, Wu Qinghui, Qin Zhipeng, Xie Guoqiang
Opt Express. 2018 Mar 5;26(5):5558-5563. doi: 10.1364/OE.26.005558.
3 at.% Er:SrF laser crystals with high optical quality were successfully grown using the temperature gradient technique (TGT). The intense mid-infrared emission was observed around 2.7 μm with excitation by a 970 nm LD. Based on the Judd-Ofelt theory, the emission cross-sections of the I-I transition were calculated by using the Fuchtbauer-Ladenburg (FL) method. Efficient continuous-wave laser operation at 2.8 µm was achieved with the lightly-doped 3 at.% Er:SrF crystal pumped by a 970 nm laser diode. The laser output power reached up to 1.06 W with a maximum slope efficiency of 26%.
采用温度梯度技术（TGT）成功生长出了具有高光学质量的3 at.%铒掺杂氟化锶（Er:SrF）激光晶体。在970 nm激光二极管激发下，观察到了波长约2.7 μm的强烈中红外发射。基于Judd-Ofelt理论，使用Fuchtbauer-Ladenburg（FL）方法计算了I-I跃迁的发射截面。利用970 nm激光二极管泵浦的轻掺杂3 at.% Er:SrF晶体，实现了2.8 µm波长的高效连续波激光运转。激光输出功率达到1.06 W，最大斜率效率为26%。
