A kind of ytterbium holmium dysprosium three-doped lead fluoride mid-infrared laser crystal and preparation method thereof
A technology of infrared lasers and laser crystals, applied in chemical instruments and methods, lasers, crystal growth, etc.
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Embodiment 1
[0022] Embodiment one: Yb 0.01 Ho 0.01 Dy 0.01 Pb 0.97 f 2 Crystal Growth Preparation
[0023] PbF 2 (99.999%), YbF 3 (99.999%), HoF 3 (99.999%) and DyF 3 (99.999%) are fully mixed according to the molar ratio of the proportioning formula, put into a self-made crucible and sealed after fluorination treatment. Place the crucible in the high-temperature zone of the downhill furnace at a temperature of 980°C for 6 hours, and keep it warm for 4 hours to fully melt it. The growth atmosphere is N 2 gas, the crucible grows at a rate of 1.2-1.8mm / h, and the temperature gradient in the growth area is kept at 20-80°C / cm; h rate to cool slowly to room temperature.
Embodiment 2
[0024] Embodiment two: Yb 0.02 Ho 0.01 Dy 0.005 Pb 0.965 f 2 Crystal Growth Preparation
[0025] PbF 2 (99.999%), YbF 3 (99.999%), HoF 3 (99.999%) and DyF 3 (99.999%) are fully mixed according to the molar ratio of the proportioning formula, put into a self-made crucible and sealed after fluorination treatment. Place the crucible in the high-temperature zone of the downhill furnace at 1060°C for 8 hours, and keep it warm for 4 hours to fully melt it. The growth atmosphere is N 2 gas, the crucible grows at a rate of 1.4-1.6mm / h, and the temperature gradient in the growth area is kept at 20-60°C / cm; Slowly cooled to room temperature at rate h, the PbF obtained after the end of the growth 2 The laser crystal has good optical quality. Schematic diagram of the sensitization and deactivation mechanism of ytterbium holmium dysprosium tri-doped lead fluoride laser crystal figure 1 shown.
Embodiment 3
[0026] Embodiment three: Yb 0.02 Ho 0.02 Dy 0.01 Pb 0.95 f 2 Crystal Growth Preparation
[0027] PbF 2 (99.999%), YbF 3 (99.999%), HoF 3 (99.999%) and DyF 3 (99.999%) are fully mixed according to the molar ratio of the proportioning formula, put into a self-made crucible and sealed after fluorination treatment. Place the crucible in the high-temperature zone of the downhill furnace at a temperature of 1080°C for 8 hours, and keep it warm for 6 hours to fully melt it. The growth atmosphere is N 2 gas, the crucible grows at a rate of 1.5-1.8mm / h, and the temperature gradient in the growth area is kept at 20-50°C / cm; h rate to cool slowly to room temperature. After the growth is over, the crystal is taken out and directional cut, processed and polished, and the spectrum test is carried out. The fluorescence spectrum is as follows: figure 2 shown.
[0028] In summary, the present invention utilizes the Bridgman method to grow ytterbium (Yb 3+ ) Holmium (Ho 3+ ) Dys...
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