1 中国科学院上海光学精密机械研究所高功率激光物理联合实验室， 上海 201800
2 中国科学院大学， 北京 100049
3 中国工程物理研究院上海激光等离子体研究所， 上海 201800
为适应高功率激光系统的紧凑空间需求，将基于二阶鬼像的远近光场耦合方案应用于高功率激光准直技术中，设计并搭建出灵敏的小型准直光学系统。提出完备的测试方案，验证了该方案的可行性，获得近场测量灵敏度为7.04 μm/pixel，远场测量灵敏度为18.14 (″)/pixel，并得到远场变化对近场的影响关系，用以优化光束校准。相比于传统远、近场分离的准直系统，该方案在满足成像质量和分辨率要求的同时，大幅缩减了光路和器件数量，远、近光场相互影响和校准的反馈处理更便捷。
激光光学 光场耦合 透镜系统设计 高功率激光 精密准直 鬼反射成像
Author Affiliations
Abstract
Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
Stray light in high-power laser facilities not only decreases the gain capacity of the main amplifier, but can also cause permanent damage to optical components, greatly threatening the safety operation of the SG-III. This Letter reports a technique for quickly pinpointing the source of stray light in the main amplification optical path of the SG-III. The achieved results indicate that the accuracy of our method is up to 1 m in an optical path of 100 m. The judging method is effective for examining and removing harmful stray light in the SG-III laser facility and it can be promoted in huge laser facilities of this kind.
140.3330 Laser damage 290.2648 Stray light 290.2745 Ghost reflections Chinese Optics Letters
2015, 13(3): 031406
