中国激光, 2009, 36 (5): 1037, 网络出版: 2009-05-22
高平均功率室温运转闪光灯抽运Cr∶Tm∶Ho∶YAG激光器
High Average Power Flashlamp-Pumped Cr∶Tm∶Ho∶YAG Laser at Room Temperature
摘要
报道了氙灯抽运的2.1 μm Cr∶Tm∶Ho∶YAG激光器。室温下Cr∶Tm∶Ho∶YAG为准三能级系统, 振荡阈值高, 掺杂离子间存在复杂的能量转移过程。采用优化掺杂浓度配比的激光晶体, 长脉冲抽运, 实现了室温下2.1 μm波长激光输出。采用了高漫反射陶瓷聚光腔, 对有效抽运光谱带的反射率高达95％。冷却水温15 ℃条件下,重复频率10 Hz,获得最大平均功率23.5 W; 重复频率5 Hz, 获得最大激光脉冲能量2.58 J, 最大斜率效率4.3％。
Abstract
A xenon flashlamp-pumped Cr∶Tm∶Ho∶YAG laser operating at 2.1 μm is demonstrated. Since the Cr∶Tm∶Ho∶YAG has a high threshold owing to its quasi-three-level nature and the complex energy transfer process between the doped ions, optimum ions concentration proportion and long pulse pumping are employed to achieve the 2.1-μm laser operating at room temperature. The ceramic pumping cavity with high diffuse reflectivity of 95% for effective pump band is used. With the cooling water temperature of 15 ℃, the maximum laser average power is 23.5 W at 10-Hz repetition frequency, and the maximum laser pulse energy is 2.58 J with a maximum slope efficiency of 4.3% at 5 Hz.
龙井宇, 刘沛沛, 杨凯, 郑新亮, 任兆玉, 白晋涛. 高平均功率室温运转闪光灯抽运Cr∶Tm∶Ho∶YAG激光器[J]. 中国激光, 2009, 36(5): 1037. Long Jingyu, Liu Peipei, Yang Kai, Zheng Xinliang, Ren Zhaoyu, Bai Jintao. High Average Power Flashlamp-Pumped Cr∶Tm∶Ho∶YAG Laser at Room Temperature[J]. Chinese Journal of Lasers, 2009, 36(5): 1037.
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