Duan Xiaoming, Qian Chuanpeng, Shen Yingjie, Su Liangbi, Zheng Lihe, Li Linjun, Yao Baoquan, Dai Tongyu
Opt Express. 2019 Feb 18;27(4):4522-4527. doi: 10.1364/OE.27.004522.
In this paper, we demonstrate a new 2.1-µm Ho:(ScY)SiO (Ho:SYSO) laser at room temperature. The absorption and emission spectra of Ho:SYSO crystal were studied at temperature of 300 K. The strongest absorption peak of I level of Ho ions in SYSO crystal is located at 1943 nm with cross section of 0.79 × 10 cm. The maximum emission cross section of 1.74 × 10 cm is located at 2032 nm. A 1940.3-nm narrow-linewidth Tm fiber was used to pump the Ho:SYSO crystal. At absorbed pump power of 20.4 W, the continuous wave Ho:SYSO laser yielded 10.3 W maximum output power at 2097.67 nm and 54.7% slope efficiency respect with absorbed pump power. In addition, we have estimated the beam quality factor (M) of Ho:SYSO laser to be 1.7 near maximum output level.
在本文中，我们展示了一种新型的室温下工作的2.1微米钬：（钪钇）硅酸钇（Ho:SYSO）激光器。在300K温度下研究了Ho:SYSO晶体的吸收光谱和发射光谱。SYSO晶体中钬离子I能级的最强吸收峰位于1943纳米处，截面为0.79×10平方厘米。最大发射截面为1.74×10平方厘米，位于2032纳米处。使用一根1940.3纳米窄线宽的铥光纤来泵浦Ho:SYSO晶体。在20.4瓦的吸收泵浦功率下，连续波Ho:SYSO激光器在2097.67纳米处产生了10.3瓦的最大输出功率，相对于吸收泵浦功率的斜率效率为54.7%。此外，我们估计Ho:SYSO激光器在接近最大输出水平时的光束质量因子（M²）为1.7。
