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arXiv 2103.00843physics.optics
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用于10s到100s PW激光器的多步脉冲压缩器

A multistep pulse compressor for 10s to 100s PW lasers

Jun Liu, Xiong Shen, Shuman Du, Ruxin Li

AI总结:

针对高能拍瓦激光器中衍射光栅损伤阈值和尺寸限制脉冲压缩的问题,提出一种多步脉冲压缩器(MPC),通过棱镜对、四光栅压缩器和时空聚焦自压缩器修改时空特性,实现单束100 PW或双束超150 PW激光输出,并简化系统提高稳定性。

摘要:

高能量的数十(10s)到数百(100s)拍瓦(PW)激光器是探索强场量子电动力学(QED)以及从真空中产生正负电子对等前沿基础研究的关键工具。由于衍射光栅的损伤阈值和尺寸的限制,脉冲压缩器最近成为了实现更高峰值功率的主要障碍。在此,我们提出了一种可行的多步脉冲压缩器(MPC),通过修改其时空特性来提高最大可承受的输入和输出脉冲能量。具体而言,这种新型MPC包括一个用于预压缩的棱镜对、一个用于主压缩的四光栅压缩器(FGC),以及一个基于时空聚焦的自压缩器用于后压缩。棱镜对可以引入空间色散,使激光束平滑并扩大,从而增加最大输入和输出脉冲能量。结果表明,使用MPC和现有可用光学器件,可以获得单束高达100 PW的激光,或通过组合两束光获得超过150 PW的激光。这种新型光学设计将简化压缩器,提高稳定性,并同时节省昂贵的光栅/光学器件。结合多光束拼接孔径组合方法、拼接光栅方法、更大的光栅或基于负啁啾脉冲的自压缩方法,未来有望使用这种MPC方法获得数百(100s)PW的激光束,这将进一步拓展超强激光物理研究领域。

英文摘要:

High-energy tens (10s) to hundreds (100s) petawatt (PW) lasers are key tools for exploring frontier fundamental researches such as strong-field quantum electrodynamics (QED), and the generation of positron-electron pair from vacuum. Recently, pulse compressor became the main obstacle on achieving higher peak power due to the limitation of damage threshold and size of diffraction gratings. Here, we propose a feasible multistep pulse compressor (MPC) to increase the maximum bearable input and output pulse energies through modifying their spatiotemporal properties. Typically, the new MPC including a prism pair for pre-compression, a four-grating compressor (FGC) for main compression, and a spatiotemporal focusing based self-compressor for post-compression. The prism pair can induce spatial dispersion to smooth and enlarge the laser beam, which increase the maximum input and output pulse energies. As a result, as high as 100 PW laser with single beam or more than 150 PW through combining two beams can be obtained by using MPC and current available optics. This new optical design will simplify the compressor, improve the stability, and save expensive gratings/optics simultaneously. Together with the multi-beam tiled-aperture combining method, the tiled-grating method, larger gratings, or negative chirp pulse based self-compression method, several 100s PW laser beam is expected to be obtained by using this MPC method in the future, which will further extend the ultra-intense laser physics research fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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