Investigation of near-field propagation properties of mosaic grating-based compressors for kilojoule petawatt laser systems
Year: 2025
Type: article
Abstract: Large-aperture gratings are core components for pulse compression in kilojoule petawatt laser systems. The wavefront or amplitude error originating from fabrication and assembly of these gratings can be transformed into near-field modulation during propagation of the laser pulse. In severe cases, near-field modulation would induce laser damage on gratings and downstream optics. In this study, a three-dimensional near-field propagation model is developed based on ray tracing and diffraction propagation theory, allowing one to quantify the effect of each grating in the compressor independently. We investigate near-field propagation properties of the mosaic grating-based compressor in detail; the impacts of periodic wavefront error and mosaic gap error of the mosaic grating on near-field modulation are analyzed and evaluated, with two measured wavefronts introduced for further analysis. This work offers theoretical insights for estimating the fabrication requirement of gratings and reducing the risk of laser damage.
Authors: Pengfei Huang, Zhuocai Jiang, Liangyu Wang, Youen Jiang, Xuechun Li, Jianqiang Zhu, Yanli Zhang, Pengqian Yang
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,900
Funder: Chinese Academy of Sciences
OpenAlex ID: W4414415432