通过快速扩展等离子体光栅实现激光压缩
Laser Compression via fast-extending plasma gratings
AI总结：
本研究提出一种通过电离受激布里渊散射产生的高声波形成快速扩展等离子体光栅的激光压缩新方法，经模拟验证可在近80%效率下将13ps泵浦脉冲压缩至7.2fs，为产生临界激光功率提供了高效鲁棒的新途径。
摘要：
本文提出了一种利用快速扩展等离子体光栅（FEPG）压缩激光脉冲的新方法，该光栅通过电离背景气体中受激布里渊散射（SBS）产生的高声波生成。经短激光脉冲电离后，声子形成光速FEPG，可全反射共振泵浦激光。由于反射面以光速运动，反射脉冲会在时间上重叠并被压缩。该机制得到了全动力学粒子模拟（PIC）程序Opic的模拟结果支持，在激光波长为1微米的条件下，泵浦脉冲从13皮秒被压缩至数个周期（7.2飞秒），效率接近80%。该方法具有无线性级的高效率、对等离子体不稳定性鲁棒、无需种子光以及泵浦强度适用范围广等特点，是产生临界激光功率的一种极具潜力的方案。
英文摘要：
It is proposed a new method of compressing laser pulse by fast extending plasma gratings(FEPG), which is created by ionizing the hypersound wave generated by stimulated Brillouin scattering(SBS) in the background gas. Ionized by a short laser pulse, the phonon forms a light-velocity FEPG to fully reflect a resonant pump laser. As the reflecting surface moves with a light velocity, the reflected pulse is temporally overlapped and compressed. This regime is supported by the simulation results of a fully kinetic particle-in-cell(PIC) code Opic with a laser wavelength of 1um, displaying a pump pulse is compressed from 13ps to a few cycles(7.2fs), with an efficiency close to 80%. It is a promising method to produce critical laser powers due to several features: high efficiency without a linear stage, robustness to plasma instabilities, no seed and a wide range of pump intensity.
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。
