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High Power Laser Science and Engineering 2024年第1期12卷 84-98页

作者： Yujia Zhang Wei Fan Jiangfeng Wang Xiaochao Wang Xinghua Lu Dajie Huang Shouying Xu Yanli Zhang Mingying Sun Zhaoyang Jiao shenlei zhou Xiuqing Jiang Key Laboratory of High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Frequency modulation(FM)-to-amplitude modulation(AM) conversion is an important factor that affects the time±power curve of inertial confinement fusion(ICF) high-power laser facilities. This conversion can impact uniform compression and increase the risk of damage to optics. However, the dispersive grating used in the smoothing by spectral dispersion technology will introduce a temporal delay and can spatially smooth the target. The combined effect of the dispersive grating and the focusing lens is equivalent to a Gaussian low-pass filter, which is equivalent to 8 GHz bandwidth and can reduce the intensity modulation on the target to below 5% with 0.3 nm @ 3 GHz + 20 GHz spectrum phase modulation. The results play an important role in the testing and evaluating of the FM-to-AM on the final optics and the target, which is beneficial for comprehensively evaluating the load capacity of the facility and isentropic compression experiment for ICF.

关键词： dispersion grating frequency modulation-to-amplitude modulation conversion high-power laser facility inertial confinement fusion phase modulation

An important effect of filamentation instability on laser fusion physical processes

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High Power Laser Science and Engineering 2013年第Z1期1卷 110-122页

作者： Zunqi Lin Anle Lei Wei Fan shenlei zhou Li Wang National Laboratory on High Power Laser and Physics Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences

The process of high power laser interaction with the large scale length corona plasma produced by the leading edge of the laser pulse has been investigated. Early experimental results are re-analyzed and conclusions drawn. In particular,studies of the close connection of unstable filamentation instability with – mainly – two-plasmon decay and – partly –stimulated Raman scattering, stimulated Brillouin scattering, and resonance absorption are carried out in this paper. The positive and negative effects of filamentation instability are also discussed.

关键词： instability unstable filaments figure Brillouin heating focusing spatially seriously modulated

A novel cleanliness control method for disk amplifiers

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High Power Laser Science and Engineering 2020年第4期8卷 129-133页

作者： Yangshuai Li Bingyan Wang Panzheng Zhang Yanli Zhang Yanfeng Zhang shenlei zhou Weixin Ma Jianqiang Zhu Key Laboratory on High Power Laser and Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Shanghai Institute of Laser Plasma China Academy of Engineering PhysicsShanghai 201800China

As the key part for energy amplification of high-power laser systems,disk amplifiers must work in an extremely clean *** from the traditional cleanliness control scheme of active intake and passive exhaust(AIPE),a new method of active exhaust and passive intake(AEPI)is proposed in this *** with computational fluid dynamics(CFD)technology,through the optimization design of the sizes,shapes,and locations of different outlets and inlets,the turbulence that is unfavorable to cleanliness control is effectively avoided in the disk amplifier cavity during the process of ***,the cleanliness control of the cavity of the disk amplifier can be realized just by once ***,the micro negative pressure environment in the amplifier cavity produced during the exhaust process reduces the requirement for *** method is simple,time saving,gas saving,efficient,and *** is also suitable for the cleanliness control of similar amplifiers.

关键词： active exhaust and passive intake computational fluid dynamics cleanliness control disk amplifier

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神光Ⅱ综合实验平台

中国激光 2024年第11期51卷 3-21页

作者：朱健强李学春朱俭朱宝强马伟新周申蕾卢兴强范薇张攀政刘志刚王利杨琳刘代中唐顺兴孙明营杨朋千谢兴龙朱坪孙美智梁潇张国文欧阳小平张艳丽张秀平王冰艳林尊琪范滇元高功率激光物理联合室上海201800 中国科学院上海光学精密机械研究所上海201800 中国工程物理研究院上海激光等离子体研究所上海201800

中国科学院上海光学精密机械研究所(简称“上海光机所”)是中国最早开展高功率激光系统及其应用研究的单位。在建所60周年之际,本文简要回顾了上海光机所建造的系列高功率激光装置和相关技术发展,重点介绍了现今运行的神光Ⅱ多功能综合... 详细信息

中国科学院上海光学精密机械研究所(简称“上海光机所”)是中国最早开展高功率激光系统及其应用研究的单位。在建所60周年之际,本文简要回顾了上海光机所建造的系列高功率激光装置和相关技术发展,重点介绍了现今运行的神光Ⅱ多功能综合实验平台的性能和技术进步,以及利用此平台取得的若干具有标志性的重要物理实验成果,最后展望了未来高峰值功率激光技术与工程发展的基本问题和趋势。

关键词：惯性约束聚变神光装置激光工程激光光学

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谱色散平滑与透镜列阵联用实现均匀照明

光学学报 2007年第2期27卷 275-279页

作者：周申蕾林尊琪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

为满足激光惯性约束聚变中靶面激光辐照不均匀性低于5%的要求,在目前使用透镜列阵基础上,提出了谱色散平滑与透镜列阵联用方案,对其进行数值计算并分析其平滑效果和应用可行性。结果表明:焦斑的不均匀性从单独使用透镜列阵时的14%降低... 详细信息

为满足激光惯性约束聚变中靶面激光辐照不均匀性低于5%的要求,在目前使用透镜列阵基础上,提出了谱色散平滑与透镜列阵联用方案,对其进行数值计算并分析其平滑效果和应用可行性。结果表明:焦斑的不均匀性从单独使用透镜列阵时的14%降低到与谱色散平滑结合后的3%;对焦斑点功率谱的分析表明谱色散平滑通过抑制焦斑中高频的频谱强度达到平滑效果。该方案可以进一步提高焦斑平滑效果,计算结果对实际应用有着重要的参考意义。

关键词：激光物理辐照不均匀性光谱色散平滑透镜列阵相位调制色循环

Wavefront measurement techniques used in high power lasers

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High Power Laser Science and Engineering 2014年第3期2卷 12-23页

作者： Haiyan Wang Cheng Liu Xiaoliang He Xingchen Pan shenlei zhou Rong Wu Jianqiang Zhu Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences College of Sciences Jiangnan University

The properties of a series of phase measurement techniques,including interferometry,the Hartmann–Shack wavefront sensor,the knife-edge technique,and coherent diffraction imaging,are summarized and their performance in high power laser applications is *** advantages,disadvantages,and application ranges of each technique are discussed.

关键词： wavefront measurement phase retrieval focus prediction Ptychographical Iterative Engine

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靶场终端传输反射镜表面洁净控制技术研究

中国激光 2022年第13期49卷 15-22页

作者：李养帅张严峰刘志刚周申蕾孙明营朱健强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

传输反射镜是高功率激光装置中连接主放大系统与靶场终端的关键组成部分,实现它的表面洁净控制尤为必要。本课题组基于风刀高速吹扫颗粒物去除技术,探究了开放式环境下,风刀安装高度、进气压力、出气口间隙、吹扫次数等工艺参数对靶场... 详细信息

传输反射镜是高功率激光装置中连接主放大系统与靶场终端的关键组成部分,实现它的表面洁净控制尤为必要。本课题组基于风刀高速吹扫颗粒物去除技术,探究了开放式环境下,风刀安装高度、进气压力、出气口间隙、吹扫次数等工艺参数对靶场终端反射镜表面AlO、灰尘和不锈钢等颗粒物去除效率的影响,并从实验中捕捉到了颗粒物的动态运动轨迹。研究结果表明:提高进气压力可以提高颗粒物的去除效率;当风刀安装高度为4 mm、进气压力为1.5 MPa时,0.05 mm或0.1 mm的风刀出气口间隙均可实现90%以上的平均去除效率;当进气压力不高于1.2 MPa时,增加吹扫次数并不能提高颗粒物的去除效率;在去除过程中,颗粒物沿着高速气流方向直线运动。本次实验结果为靶场终端传输反射镜在线表面洁净控制提供了重要参考和技术支撑。

关键词：光学器件传输反射镜洁净控制颗粒污染物风刀

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全频分段控制下连续相位板的优化设计

光学学报 2018年第7期38卷 281-287页

作者：朱应成邬融张军勇周申蕾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 中国科学院大学北京100049

为了提高聚焦光束质量,针对高功率激光驱动器的连续相位板(CPP)进行设计,改进了传统盖斯贝格-撒克斯通(G-S)算法的设计。设计基于分步分段控制相位板频谱的目标,约束初始相位的选取,保留带有目标焦斑低频信息的初始相位信息,在迭代过程... 详细信息

为了提高聚焦光束质量,针对高功率激光驱动器的连续相位板(CPP)进行设计,改进了传统盖斯贝格-撒克斯通(G-S)算法的设计。设计基于分步分段控制相位板频谱的目标,约束初始相位的选取,保留带有目标焦斑低频信息的初始相位信息,在迭代过程中适当控制中高频信息。实验结果表明,相对于传统随机连续初始相位,改进后CPP作用下的焦斑顶部光强方均差误差(RMS)能更快地收敛到目标阈值。改进的初始相位不仅避免了G-S算法可能产生局部最优的问题,而且也能很好地应用于非对称焦斑的设计。

关键词：光学器件光束质量连续相位板盖斯贝格-撒克斯通算法初始相位

基于数字脉冲整形技术的可变光谱宽度相位调制研究

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中国激光 2021年第20期48卷 78-84页

作者：龚雨枫汪小超唐阳慧徐首英周申蕾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 中国科学院大学北京100049

高功率激光驱动器中多采用谱色散匀滑(SSD)的束匀滑技术,而SSD中的相位调制常使用等幅相位调制。为进一步改善匀滑效果,提高动态调控能力,提出一种特异性相位调制技术,即采用调制深度为时变函数的特异性调制方式来获得光谱宽度可随时间... 详细信息

高功率激光驱动器中多采用谱色散匀滑(SSD)的束匀滑技术,而SSD中的相位调制常使用等幅相位调制。为进一步改善匀滑效果,提高动态调控能力,提出一种特异性相位调制技术,即采用调制深度为时变函数的特异性调制方式来获得光谱宽度可随时间变化的信号输出。基于相位调制的频谱理论,分析了特异性相位调制后的激光频谱特性。利用任意波形发生器(AWG)整形输出的特定相位调制信号开展实验研究,通过改变AWG输出两路电信号的相对时间差,得到250 ps的信号光在3 ns内不同时间点的调制光谱,实验结果与理论模拟结果一致。这种调制方式可以完成光谱宽度的连续实时调控,这对于高功率激光驱动器的激光参数控制中实现动态的光谱色散匀滑有着重要应用。

关键词：激光光学相位调制光谱宽度光谱色散匀滑惯性约束核聚变

Status and development of high-power laser facilities at the NLHPLP

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High Power Laser Science and Engineering 2018年第4期6卷 21-43页

作者： Jianqiang Zhu Jian Zhu Xuechun Li Baoqiang Zhu Weixin Ma Xingqiang Lu Wei Fan Zhigang Liu shenlei zhou Guang Xu Guowen Zhang Xinglong Xie Lin Yang Jiangfeng Wang Xiaoping Ouyang Li Wang Dawei Li Pengqian Yang Quantang Fan Mingying Sun Chong Liu Dean Liu Yanli Zhang Hua Tao Meizhi Sun Ping Zhu Bingyan Wang Zhaoyang Jiao Lei Ren Daizhong Liu Xiang Jiao Hongbiao Huang Zunqi Lin National Laboratory on High Power Laser and Physics Shanghai 201800China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Shanghai Institute of Laser Plasma Chinese Academy of Engineering and PhysicsShanghai 201800China

In this paper, we review the status of the multifunctional experimental platform at the National Laboratory of High Power Laser and Physics(NLHPLP). The platform, including the SG-II laser facility, SG-II 9th beam, SG-II upgrade(SG-II UP) facility, and SG-II 5 PW facility, is operational and available for interested scientists studying inertial confinement fusion(ICF) and a broad range of high-energy-density physics. These facilities can provide important experimental capabilities by combining different pulse widths of nanosecond, picosecond, and femtosecond scales. In addition, the SG-II UP facility, consisting of a single petawatt system and an eight-beam nanosecond system, is introduced including several laser technologies that have been developed to ensure the performance of the facility. Recent developments of the SG-II 5 PW facility are also presented.

关键词： high-power laser facility inertial confinement fusion solid-state amplifier