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arXiv · 2307.04968

A novel small-scale self-focusing suppression method for ultrahigh peak power lasers

Shuren Pan·Fenxiang Wu·Yang Zhao·Zongxin Zhang·Jiabing Hu·Yi Xu·Yuxin Leng·Ruxin Li·Efim Khazanov
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Abstract

We proposed a novel method, using an asymmetric four grating compressor (AFGC) to improve the spatial uniformity of laser beams, to suppress the small-scale self-focusing (SSSF) during the post-compression of ultrahigh peak power lasers. The spatial uniformity is an important factor in performing post-compression, due to the spatial intensity nonuniformity will be enhanced while going through a nonlinear process. And what's more, the strong intensity spikes induced during nonlinear process can seriously damage the subsequent optical components. Moreover, the three-dimensional numerical simulations of the post-compression are implemented based on a petawatt (PW) class laser with a standard compressor and an AFGC. The results show that the post-compression with AFGC can shorten the laser pulses from 30fs to sub-10fs and meanwhile efficiently suppress SSSF. This work provides a promising scheme for the post-compression scaling to PW and even 10PW lasers.

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Shuren Pan, Fenxiang Wu, Yang Zhao, Zongxin Zhang, Jiabing Hu, Yi Xu, Yuxin Leng, Ruxin Li, Efim Khazanov. 2023-07-11. A novel small-scale self-focusing suppression method for ultrahigh peak power lasers. https://arxiv.org/abs/2307.04968

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