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| 腔外旋转泵浦的Nd∶YAG固体激光器研究 |
| Research on Nd∶YAG solid-state laser with extracavity rotatory pumping |
| 投稿时间：2023-03-21 |
| DOI：10.3969/j.issn.1005-5630.202303210071 |
| 中文关键词: 腔外旋转泵浦 Nd∶YAG激光器 热效应 有限元分析 |
| 英文关键词:extracavity rotatory pumping Nd∶YAG lasers thermal effect finite element analysis |
| 基金项目:国家重点研究发展计划(2020YFB2007504)；国家自然科学基金（62175245）；上海市地方高校能力建设项目(22010503200) |
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| 摘要点击次数: 1895 |
| 全文下载次数: 1975 |
| 中文摘要: |
| 固体激光器的热管理仍然是高功率激光系统发展的一个持续挑战。在激光系统中增益介质和泵浦光之间引入相对运动是一种高效的热管理方案。针对静止泵浦，旋转增益介质泵浦以及泵浦光旋转泵浦3种泵浦方式，借助有限元数值模拟方法分析了Nd∶YAG晶体的温度分布。泵浦光以800 r/min旋转时，在35 W泵浦功率下，使用标准的热沉冷却技术，晶体的最高温度达到约36 ℃，仅增加约16 ℃，这远低于静止泵浦时的142 ℃。实验设计并演示了一种腔外旋转泵浦的Nd∶YAG激光器，得到了12.2 W的1064 nm连续输出，斜率效率为37.2%，这大于静止时的35.1%，实验结果与理论结果相符合。研究表明，腔外旋转泵浦的固体激光器拥有高效的热管理。 |
| 英文摘要: |
| Thermal management in solid-state lasers is still a challenge in the development of high-energy laser systems. Introducing relative motion between the pump beam and the gain medium in the laser system is an efficient thermal management scheme. The temperature distribution of Nd∶YAG crystal was analyzed by means of finite element numerical simulation for static pumping, rotating gain medium pumping and pump-beam rotating pumping. Rotated at 800 r/min with standard heat-sinking cooling the disk temperature increased by only 16 ℃ reaching a maximum temperature of ～36 ℃, which is much lower than ～142 ℃ at static pumping. Experimentally, we designed and demonstrated a Nd∶YAG laser with the extracavity rotatory pumping, and obtained a 12.2 W output of 1064 nm with a slope efficiency of 37.2%, which is greater than the 35.1% at static pumping. The experimental results were coinciding with the theoretical simulation. The study shows that the solid state laser with extracavity rotatory pumping displays greatly enhanced thermal control. |
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