Author Affiliations
Abstract
1 School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2 Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 430079, China
3 Graduate School of China Academy of Engineering Physics, Beijing 100193, China
A high-power CW Yb:YAG slab laser amplifier with no adaptive optics correction has been experimentally established. At room temperature, the amplifier emits a power of 22 kW with an average beam quality (β) of less than 3 in 0.5 min. To our knowledge, this is the brightest slab laser without closed-loop adaptive optics demonstrated to date. In addition, an extracted power of 17 kW with an optical extraction efficiency of 33%, corresponding to a residual optical path difference of less than 0.5 µm, is achieved with the single Yb:YAG slab gain module. The slab gain module has the potential to be scalable to higher powers while maintaining good beam quality. This makes a high-power solid-state laser system simpler and more robust.
laser amplifier Yb:YAG slab laser surface quality pumping uniformity Chinese Optics Letters
2024, 22(3): 031402
介绍了天鹅绒阴极二极管的结构及天鹅绒阴极的设计,给出了二极管参数的测量方法及结果。对3种不同材料的天鹅绒阴极进行了实验研究,获得了大面积均匀电子束,并对电子束的横向及径向均匀性进行了诊断。实验结果表明:二极管工作状态接近的条件下,3种材料的天鹅绒阴极所获得的大面积电子束均匀性相近,而与天鹅绒的材料基本无关。
天鹅绒阴极 大面积均匀电子束 泵浦均匀性 velvet cathode large area uniform electron beam pumping uniformity
