光学学报, 2017, 37 (11): 1114001, 网络出版: 2018-09-07   

31.5 W太阳光抽运Nd∶YAG固体激光器 下载: 898次

A 31.5 W Solar-Pumped Nd∶YAG Solid-State Laser
作者单位
北京理工大学光电学院, 北京 100081
摘要
设计了一种阈值较低的太阳光直接抽运的Nd∶YAG固体激光器,采用有效面积为1.03 m 2、焦距为1.2 m的菲涅耳透镜为第1级太阳光会聚装置,分腔水冷型镀金锥形腔为第2级太阳光会聚装置。在液体导光透镜和镀金锥形腔的共同作用下,通过端面、侧面同时抽运直径为5 mm、长度为75 mm的Nd∶YAG螺纹晶体棒,获得了连续稳定的1064 nm激光输出。利用光学设计软件ZEMAX和激光谐振腔仿真软件LASCAD建立理论模型,通过数值模拟验证实验结果并优化系统设计。该太阳光抽运Nd∶YAG固体激光器的激光输出功率最高为31.5 W,收集效率为30.58 W/m 2,激光器阈值功率为102 W,斜率效率为4.25%,太阳光到激光的能量转换效率为3.2%。
Abstract
A solar directly pumped Nd∶YAG solid-state laser with low threshold power is designed, in which Fresnel lens with the surface of 1.03 m 2 and focal length of 1.2 m is used as the primary solar radiation concentrator, and gold-plated conical cavity with a liquid light-guide lens is used as the secondary concentrator. The continuous and stable 1064 nm laser is obtained by end-side pumping Nd∶YAG grooved rod with diameter of 5 mm and length of 75 mm, under combined action of liquid light guide lens and the gilded taper cavity. Theoretical model is established by optical design software ZEMAX and laser resonator simulation software LASCAD, experimental results are verified, and system design is optimized by numerical simulation. The experimental results show that output power of the laser pumped Nd∶YAG solid-state laser is highest 31.5 W, laser collection efficiency is 30.58 W/m 2 , laser threshold power of is 102 W and slope efficiency is 4.25%. The energy conversion efficiency from solar radiation to laser is 3.2%.

李金华, 杨苏辉, 赵长明, 关哲, 何东兵, 张海洋. 31.5 W太阳光抽运Nd∶YAG固体激光器[J]. 光学学报, 2017, 37(11): 1114001. Jinhua Li, Suhui Yang, Changming Zhao, Zhe Guan, Dongbing He, Haiyang Zhang. A 31.5 W Solar-Pumped Nd∶YAG Solid-State Laser[J]. Acta Optica Sinica, 2017, 37(11): 1114001.

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