【作者】 王兆华； 金展； 郑加安； 王鹏； 魏志义； 张杰；

【Author】 Wang Zhaohua, Jin Zhan, Zheng Jiaan, Wang Peng, Wei Zhiyi, Zhang Jie Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080

【机构】 中国科学院物理研究所光物理实验室；

【摘要】 本文对自适应波前修正系统进行了探讨和研究,并将其应用于20太瓦的CPA激光放大装置中．在没有进行波前修正前,该激光系统输出的激光光束的光束质量约为3．5倍的衍射极限;使用自适应波前修正系统后,光束质量改进到了1．5倍的衍射极限,不仅使同样能量的超强飞秒激光的可聚焦功率密度提高了约1个数量级,而且也明显地改善了聚焦激光与周围背景的对比度．更多还原

【Abstract】 We developed an adaptive optics system to correct the wave-front distortion of an intense fs laser beam from our multi-TW laser system, Jiguang II. In this paper, the instruments of the adaptive optical system are described and the experimental results of the closed-loop wave-front correction are presented. A distorted laser wave-front of 20 wavelengths of P-V values was corrected to 0.15 wavelengths of P-V values. The beam quality of the laser system varies from 3.5 diffraction limit to 1.5 diffraction limit.更多还原