Tm:Gd₂SrAl₂O₇ (Tm:GSAO) crystal was grown by the Czochralski method. The Raman, absorption and fluorescence spectra of Tm:GSAO crystal were investigated. With a 50 W fiber-coupled laser diode as the pump source, the continuous wave (cw) laser action of Tm:GSAO crystal was demonstrated. The maximum average output power of 3.89 W at ∼1950 nm with a slope efficiency of 53.4% was achieved in a 5-mm-thick a-cut crystal when the output coupler transmittance was 2%. The results show that the Tm:GSAO is a good ∼2.0 μm laser crystal.

中文翻译：

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在新型Tm：Gd ₂ SrAl ₂ O ₇晶体中产生〜2.0μm连续波激光

通过Czochralski法生长Tm：Gd ₂ SrAl ₂ O ₇（Tm：GSAO）晶体。研究了Tm：GSAO晶体的拉曼光谱，吸收光谱和荧光光谱。以50 W光纤耦合激光二极管作为泵浦源，演示了Tm：GSAO晶体的连续波（cw）激光作用。当输出耦合器的透射率为2％时，在厚度为5mm的A型切割晶体中，在〜1950 nm处的最大平均输出功率为3.89 W，倾斜效率为53.4 ％。结果表明，Tm：GSAO是〜2.0μm良好的激光晶体。