本文關鍵詞： 激光器 薄片 諧振腔 直接液體冷卻 浸入式激光器　出處：《中國激光》2017年08期 　論文類型：期刊論文

【摘要】：介紹了一種工作在準連續(xù)狀態(tài)下的直接液體冷卻的側(cè)面抽運Nd:YAG多薄片激光諧振腔,裝置中選用20片Nd:YAG薄片作為增益介質(zhì),由激光二極管陣列在其側(cè)面進行抽運,流動的硅氧烷溶液作為冷卻液在其端面進行冷卻,振蕩激光以布儒斯特角穿過多層薄片和冷卻液實現(xiàn)增益。設計了層流冷卻流場并通過數(shù)值模擬驗證了其對來流不均勻性的耗散能力。根據(jù)之前報道的層流冷卻能力測量實驗建立數(shù)值模型,模擬了流場的冷卻效果,實驗結果證明了模型的置信性,進而基于模型對激光器中薄片的熱安全性進行了評估。在抽運能量為49.9J時,獲得了15.7J的最大脈沖能量輸出,對應光-光效率和斜率效率分別為31.4%和39.2%;在抽運脈寬為250μs,重復頻率為100Hz,平均抽運功率為5kW時,獲得了1440 W的平均輸出功率。
[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.
【作者單位】： 中國工程物理研究院研究生院;中國工程物理研究院應用電子學研究所;中國工程物理研究院高能激光科學與技術重點實驗室;衢州學院電氣與信息工程學院;
【基金】：國家863計劃(2015AA8027045)
【分類號】：TN24
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本文編號：1501792