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采用提拉法成功生长尺寸为φ30 mm×75 mm的15at.%Yb~(3+):Gd_2SiO_5单晶,并用Reitveld全谱拟合方法确定了其晶格常数、原子坐标和温度因子等参数.用吸收光谱计算了Yb~(3+)离子~2F_(7/2)(?)~2F_(5/2)能级跃迁的振子强度、谱线强度、跃迁概率、能级寿命和积分发射截面等光谱参数,并根据激光性能评估得出结论:该晶体具有较大的阈值特性,有望采用大功率激光二极管泵浦实现可调谐或超快激光输出.
The 15at.% Yb3 +: Gd2SiO5 single crystal with dimensions of φ30 mm × 75 mm was successfully grown by Czochralski method and its lattice parameters, atomic coordinates and temperature factors were determined by Reitveld full-spectrum fitting method. Absorption spectra were used to calculate the oscillator strength, spectral line intensity, transition probability, energy level lifetime and integral emission cross section for the energy transition from Yb 3+ to 2F 7/2 to 2F 5/2. And other spectral parameters. According to the evaluation of the laser performance, it is concluded that the crystal has a large threshold characteristic and is expected to adopt a high-power laser diode pump to achieve a tunable or ultra-fast laser output.