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<p>Manufacturing imperfections in large-aperture holographic gratings critically limit multi-petawatt Chirped Pulse Amplification systems. This study investigates their impact on wavefront quality using Zemax ray-tracing simulations based on real interferometric measurements. The results confirm that distortions are cumulative, with imperfections in the second and third gratings primarily driving beam degradation. Significantly, we demonstrate that rotating these critical gratings by 180° alters the residual wavefront structure. The study concludes that optimizing grating orientation, combined with adaptive optics, is an effective strategy to mitigate aberrations and restore peak intensity, offering vital guidelines for next-generation high-field laser facilities.</p>

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Impact of holographic grating imperfections on wavefront quality in large-aperture treacy compressors

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月23日

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  • Aleksandr Cheplakov,
  • Anton Kochetkov,
  • Andrey Shaykin,
  • Ivan Yakovlev,
  • Efim Khazanov,
  • Shijie Liu,
  • Qi Lu,
  • Yunxia Jin,
  • Jianda Shao

摘要

Manufacturing imperfections in large-aperture holographic gratings critically limit multi-petawatt Chirped Pulse Amplification systems. This study investigates their impact on wavefront quality using Zemax ray-tracing simulations based on real interferometric measurements. The results confirm that distortions are cumulative, with imperfections in the second and third gratings primarily driving beam degradation. Significantly, we demonstrate that rotating these critical gratings by 180° alters the residual wavefront structure. The study concludes that optimizing grating orientation, combined with adaptive optics, is an effective strategy to mitigate aberrations and restore peak intensity, offering vital guidelines for next-generation high-field laser facilities.