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arXiv · 2103.03421

Laser Compression via fast-extending plasma gratings

Zhaohui Wu·Xiaoming Zeng·Zhaoli Li·Zhimeng Zhang·Xiaodong Wang·Bilong Hu·Xiao Wang·Jie Mu·Jingqin Su·Xiaofeng Wei·Yanlei Zuo
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Abstract

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.

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Zhaohui Wu, Xiaoming Zeng, Zhaoli Li, Zhimeng Zhang, Xiaodong Wang, Bilong Hu, Xiao Wang, Jie Mu, Jingqin Su, Xiaofeng Wei, Yanlei Zuo. 2021-03-05. Laser Compression via fast-extending plasma gratings. https://doi.org/10.1063/5.0109574

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