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研究了高功率端抽运Nd∶YAG板条激光器的退偏特性。使用高功率偏振片和90°石英旋光片,实现了对高功率板条激光器输出激光的偏振状态控制和退偏补偿,有效提升了激光器线偏振光输出功率,改善了线偏振光近场光强分布的均匀性。实验结果表明,通过优化偏振补偿,输出线偏振激光功率由8.7kW提升至9.6kW,退偏率由30.8%降至3.1%。
The depolarization characteristics of Nd:YAG slab lasers with high power pump are studied. By using high power polarizer and 90 ° quartz polarizer, the polarization state control and depolarization compensation of the output laser of the high power slab laser are realized, the output power of linearly polarized laser light is effectively improved, the near-field light intensity of the linearly polarized light is improved Distribution of uniformity. Experimental results show that by optimizing the polarization compensation, the output linearly polarized laser power is increased from 8.7kW to 9.6kW, and the de-furcation rate is reduced from 30.8% to 3.1%.