Spectroscopic and laser properties of Er:LuSGG crystal for high-power∼2.8 µm mid-infrared laser
Spectroscopic and laser properties of Er:LuSGG crystal for high-power∼2.8 µm mid-infrared laser
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用于高功率-2.8 µm 中红外激光的 Er:LuSGG 晶体的光谱和激光特性
DOI：
10.1364/oe.389550
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发表时间：
2020
期刊：
影响因子：
3.8
通讯作者：
Shaotang Yin
中科院分区：
文献类型：
--
作者：
Xuyao Zhao;Dunlu Sun;Jianqiao Luo;Huili Zhang;Cong Quan;Lunzhen Hu;Zhiyuan Han;Kunpeng Dong;Maojie Cheng;Shaotang Yin
我们首次报道了一种新型的Er：LuSGG有源增益介质，其激光波长为2795 nm。采用提拉法成功地生长出了高质量的Er：LuSGG晶体。通过与同类掺铒石榴石晶体的对比，研究了其吸收和荧光发射截面等光谱特性。上（4 I 11/2）和下（4 I 13/2）激光能级的荧光寿命分别为1.75和4.64 ms。在973 nm激光二极管泵浦下，连续模最大输出功率为789 mW，光光转换效率为20.2%，斜率效率为24.4%，光束质量良好。结果表明，Er：LuSGG是一种很有前途的工作在2.8 μm的MIR激光材料。
We demonstrate a novel Er:LuSGG active gain medium emitting laser wavelength at 2795 nm for the first time. The Er:LuSGG crystal is grown successfully by the Czochralski method with high crystalline and optical quality. The spectra properties, including absorption and fluorescence emission cross-section are resented in contrast with similar Er-doped garnet crystals. The fluorescence lifetimes of the upper (4I11/2) and lower (4I13/2) laser levels are 1.75 and 4.64 ms, respectively. Under 973 nm laser diode pumping, a maximum output power of 789 mW in continuous-wave mode, corresponding to optical-to-optical efficiency of 20.2% and slope efficiency of 24.4%, is achieved with high laser beam quality. The results show that the Er:LuSGG is a promising MIR laser material operated at 2.8 µm.