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<p>This paper introduces the InnoZag Booster Amplifier, a&#xa0;novel zigzag-geometry architecture designed based on Innoslab platform, to improve output power and mitigate the thermal effects in high-power ultrafast laser systems. Through a&#xa0;comprehensive numerical model, we demonstrate that the Yb:YAG-based Innozag design achieves a&#xa0;24% enhancement in amplified power compared to conventional Innoslab amplifiers under identical conditions (1180 W pump power, 620 W seed power). The zigzag propagation path for both pump and laser beams provides two key advantages; enhanced power intensity in overlapping regions that improved energy extraction and superior thermal averaging that reduces wavefront distortion by 67% (200 nm vs. 600 nm variance in optical path differences in the pumped region). This work identifies Yb:YAG as the optimal gain medium for zigzag geometries, achieving 2.3&#xa0;greater gain enhancement than Nd:YAG due to its quasi-three-level dynamics. With its compatible design and optimization possibilities, this system is a&#xa0;potential candidate for integration into existing amplifier chains in ultrafast laser systems.</p>

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Optimizing beam quality and gain in high-power ultrafast lasers with a zigzag-geometry Yb:InnoSlab booster amplifier

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Mohanna Najafi,
  • Mahdi Shayganmanesh,
  • M. Mahdi Majidof

摘要

This paper introduces the InnoZag Booster Amplifier, a novel zigzag-geometry architecture designed based on Innoslab platform, to improve output power and mitigate the thermal effects in high-power ultrafast laser systems. Through a comprehensive numerical model, we demonstrate that the Yb:YAG-based Innozag design achieves a 24% enhancement in amplified power compared to conventional Innoslab amplifiers under identical conditions (1180 W pump power, 620 W seed power). The zigzag propagation path for both pump and laser beams provides two key advantages; enhanced power intensity in overlapping regions that improved energy extraction and superior thermal averaging that reduces wavefront distortion by 67% (200 nm vs. 600 nm variance in optical path differences in the pumped region). This work identifies Yb:YAG as the optimal gain medium for zigzag geometries, achieving 2.3 greater gain enhancement than Nd:YAG due to its quasi-three-level dynamics. With its compatible design and optimization possibilities, this system is a potential candidate for integration into existing amplifier chains in ultrafast laser systems.