Abstract The Yb3+:Ca9Gd(VO4)7 crystal with dimensions of Φ19 × 25 mm3 was grown by the Czochralski method for the first time. The polycrystalline materials, crystal growth, absorption and fluorescence spectra, energy level schema, fluorescence lifetime and laser performance parameters were investigated in detail. For π-polarization, the absorption coefficients, cross-sections, maximal full width at half maximum (FWHM) at around 976 nm are 1.05 cm−1, 1.27 × 10−20 cm2 and 33 nm, respectively. For σ-polarization, the relevant absorption spectral parameters at around 981 nm are 1.58 cm−1, 1.90 × 10−20 cm2 and 28 nm, respectively. At the laser wavelength around 1023 nm, the FWHM and emission cross-sections are 57 nm and 0.94 × 10−20 cm2 for π-polarization, 54 nm and 2.18 × 10−20 cm2 for σ-polarization, respectively. The results reveal that Yb3+:Ca9Gd(VO4)7 crystal can be regarded as a potential candidate for efficient LD-pumping and ultrashort pulse laser crystal.

中文翻译：

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Yb:Ca9Gd(VO4)7，一种潜在的超快脉冲激光晶体，具有良好的光谱特性

摘要 首次采用直拉法生长了尺寸为Φ19 × 25 mm3 的Yb3+:Ca9Gd(VO4)7 晶体。详细研究了多晶材料、晶体生长、吸收和荧光光谱、能级图、荧光寿命和激光性能参数。对于 π 偏振，吸收系数、横截面、约 976 nm 处的最大半高宽 (FWHM) 分别为 1.05 cm-1、1.27 × 10-20 cm2 和 33 nm。对于 σ 偏振，981 nm 附近的相关吸收光谱参数分别为 1.58 cm-1、1.90 × 10-20 cm2 和 28 nm。在 1023 nm 左右的激光波长下，π 偏振的 FWHM 和发射截面分别为 57 nm 和 0.94 × 10−20 cm2，σ 偏振的 FWHM 和发射截面分别为 54 nm 和 2.18 × 10−20 cm2。结果表明，Yb3+：