LD光纤耦合输出环形光束径向泵浦复合Yb:YAG陶瓷碟片激光技术研究

超短超快激光处于许多技术突破和科学发现的最前沿，技术的进步促使先进材料加工、THz/XUV/DUV光源产生、超时间分辨、强场物理等跨学科领域中不断打开大门，使基础研究领域获得不少重要科学发现。碟片激光技术正是提升超短超快激光功率的核心技术之一。传统碟片激光器采用复杂的多程泵浦技术提高泵浦效率，导致激光器的泵浦结构复杂、装调难度大、维护成本高。本项目提出一种环形光束径向泵浦碟片激光技术，通过锥形镜将半导体光纤耦合输出后的准直光变换为空心环形光束，通过聚焦场镜在焦平面附近获得环形细光束，折转后从圆形碟片的四周沿半径向中心泵浦。该方案具有泵浦结构简单维护方便等优点，有望解决现有碟片激光器中泵浦结构复杂、装调难度大等问题。开展环形光束径向泵浦碟片激光技术研究，探索泵浦光场与激光增益特性多维度耦合规律，发展新体制碟片激光技术，可为新一代高功率超短超快激光技术发展奠定基础。

Ultra-short & ultra-fast lasers continue to be at the forefront of many scientific breakthroughs and technological achievements and progress in the performance of these systems continue to open doors in many new and exciting interdisciplinary fields such as advanced material-processing, THz/XUV/DUV lasers, ultra-time-resolved measurement and intense-fields physics. Among the different technologies that have shaped these advances, thin-disk lasers have generated particularly spectacular breakthroughs. Traditional disk lasers use complex multi-pass pumping technology to improve pumping efficiency, resulting in complex pump structures, difficult installation and adjustment, and high maintenance costs..This project proposes a ring-shape beam radial pumped disk laser technology. The collimated beam of a fiber coupled laser diodes is shaped into a ring-shape beam by a cone lens. The narrow ring-shape beam is obtained near the focal plane through the focusing of a field lens. The beam converges towards the center after reflection on the bevel of the disk. This solution has the advantages of simpler pump structure and easier maintenance. It is expected to solve the problems mentioned above in the traditional disk lasers. The research of this technology is of great significance for the development of a new generation of high-power ultra-short ultra-fast lasers.