基于空谱干涉和频域分割的超快激光时空耦合特性的单次测量方法  

Single-frame measurement of complete spatiotemporal field of ultrashort laser pulses using frequency domain separate spectral interferometry

作　　者：李伟[1,2,4] 王逍[2] 洪义麟 曾小明[2] 母杰[2] 胡必龙[2] 左言磊[2] 吴朝辉 王晓东[2] 李钊历[2] 粟敬钦[2] Li Wei;Wang Xiao;Hong Yi-Lin;Zeng Xiao-Ming;Mu Jie;Hu Bi-Long;Zuo Yan-Lei;Wu Zhao-Hui;Wang Xiao-Dong;Li Zhao-Li;Su Jing-Qin(Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China;Science and Technology on Plasma Physics Laboratory,Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230026,China;Graduate School of China Academy of Engineering Physics,Beijing 100088,China)

机构地区：[1]中国科学技术大学光学与光学工程系,合肥230026 [2]中国工程物理研究院激光聚变研究中心,等离子体物理重点实验室,绵阳621900 [3]中国科学技术大学国家同步辐射实验室,合肥230026 [4]中国工程物理研究院研究生院,北京100088

出　　处：《物理学报》2022年第3期135-141,共7页Acta Physica Sinica

基　　金：中国工程物理研究院等离子体物理重点实验室自主科研项目(批准号:JCKYS2018212024);国家重点研发计划(批准号:2018YFA0404804)资助的课题。

摘　　要：大口径超高峰值功率激光的时空耦合(spatiotemporal couplings,STCs)畸变会严重影响焦斑的功率密度,为了准确预测远场处的光场分布、补偿STCs畸变以提升远场的峰值功率密度,亟须一种有效的时空耦合特性的单次测量方法.本文提出了一种基于空谱干涉和频域分割的超快激光时空耦合特性测量方法,对该测量方法的基本原理与实现方式进行了详细的阐述,并对其进行了模拟计算与分析,模拟结果表明该测量方法能够精确表征超短脉冲激光的时空耦合特性.The spatiotemporal coupling distortion of large aperture ultra-high peak power laser will degrade the pulsed beam in both near-field and far-field.To accurately predict the light field distribution at the focus and compensate for the spatiotemporal coupling distortion,a single-frame measurement of full three-dimensional spatiotemporal coupling distortion is proposed based on the frequency domain separate spatial-spectral interference.The setup requires only a slit array attached to the front of an Imaging spectroradiometer.The whole procedure of carrier frequency distinguished spectral interference measurement is simulated in this study.The simulation results prove that the presented measuring method is correct and effective.The effectiveness of this method will be further verified experimentally in next step.

关 键 词：空谱干涉 时空耦合特性 超快激光 

分 类 号：TN24[电子电信—物理电子学]