1. A novel small-scale self-focusing suppression method for ultrahigh peak power lasers
- Author
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Pan, Shuren, Wu, Fenxiang, Zhao, Yang, Zhang, Zongxin, Hu, Jiabing, Xu, Yi, Leng, Yuxin, Li, Ruxin, and Khazanov, Efim
- Subjects
FOS: Physical sciences ,Physics - Optics ,Optics (physics.optics) - 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.
- Published
- 2023
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