Huang Yisheng, Yuan Feifei, Sun Shijia, Lin Zhoubin, Zhang Lizhen
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
University of Chinese Academy of Sciences, Beijing 100039, China.
Materials (Basel). 2017 Dec 25;11(1):25. doi: 10.3390/ma11010025.
A novel laser crystal of Er:Yb:GdMgB₅O with dimension of 26 × 16 × 12 mm³ was grown successfully from K₂Mo₃O flux by the top seeded solution growth method. The thermal diffusivity and specific heat capacity were measured to calculate the thermal conductivity of the crystal. The absorption and fluorescence properties of the crystal at room temperature were investigated in detail. The Judd-Ofelt method was used to analyze the polarized absorption spectra. The emission cross-section of the ⁴I→⁴I transition was calculated by the Füchtbauer-Ladenburg formula and the relevant gain cross-sections were estimated. Continuous-wave laser output of 140 mW at 1569 nm with the slope efficiency of 17.8% was demonstrated in a plano-concave resonator. The results reveal that Er:Yb:GdMgB₅O crystal is a promising material for 1.5 μm lasers.
通过顶部籽晶溶液生长法，成功地从K₂Mo₃O助熔剂中生长出尺寸为26×16×12 mm³的新型Er:Yb:GdMgB₅O激光晶体。测量了热扩散率和比热容以计算晶体的热导率。详细研究了该晶体在室温下的吸收和荧光特性。采用Judd-Ofelt方法分析偏振吸收光谱。通过Füchtbauer-Ladenburg公式计算了⁴I→⁴I跃迁的发射截面，并估算了相关的增益截面。在平凹谐振腔中实现了1569 nm波长、140 mW的连续波激光输出，斜率效率为17.8%。结果表明，Er:Yb:GdMgB₅O晶体是一种有前途的1.5μm激光材料。
