千瓦级浸入式直接液冷Nd:YAG多薄片激光谐振腔

发布时间：2018-02-11 00:19

  本文关键词： 激光器 薄片 谐振腔 直接液体冷却 浸入式激光器　出处：《中国激光》2017年08期 　论文类型：期刊论文

【摘要】：介绍了一种工作在准连续状态下的直接液体冷却的侧面抽运Nd:YAG多薄片激光谐振腔,装置中选用20片Nd:YAG薄片作为增益介质,由激光二极管阵列在其侧面进行抽运,流动的硅氧烷溶液作为冷却液在其端面进行冷却,振荡激光以布儒斯特角穿过多层薄片和冷却液实现增益。设计了层流冷却流场并通过数值模拟验证了其对来流不均匀性的耗散能力。根据之前报道的层流冷却能力测量实验建立数值模型,模拟了流场的冷却效果,实验结果证明了模型的置信性,进而基于模型对激光器中薄片的热安全性进行了评估。在抽运能量为49.9J时,获得了15.7J的最大脉冲能量输出,对应光-光效率和斜率效率分别为31.4%和39.2%;在抽运脉宽为250μs,重复频率为100Hz,平均抽运功率为5kW时,获得了1440 W的平均输出功率。
[Abstract]:A side-pumped Nd:YAG multislice laser resonator working in a quasi-continuous state with direct liquid cooling is introduced. Twenty Nd:YAG wafers are selected as gain medium and pumped by a laser diode array on the side of the cavity. The flowing siloxane solution is cooled on its end surface as a coolant, The oscillatory laser is used to gain the laminar cooling flow through the multilayer sheet and the coolant at Brewster angle. The laminar cooling flow field is designed and its dissipation ability to the inhomogeneity of the incoming flow is verified by numerical simulation. The laminar flow cooling energy reported previously is used to verify the dissipation ability of the oscillatory laser. The numerical model is established by force measurement experiment. The cooling effect of the flow field is simulated, the confidence of the model is proved by the experimental results, and the thermal safety of the thin plate in the laser is evaluated based on the model. The maximum pulse energy output of 15.7J is obtained when the pumping energy is 49.9J. When the pump pulse width is 250 渭 s, the repetition rate is 100 Hz and the average pump power is 5 kW, the average output power of 1440W is obtained.
【作者单位】： 中国工程物理研究院研究生院;中国工程物理研究院应用电子学研究所;中国工程物理研究院高能激光科学与技术重点实验室;衢州学院电气与信息工程学院;
【基金】：国家863计划(2015AA8027045)
【分类号】：TN24
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本文编号：1501792