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

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Title: Optimizing beam quality and gain in high-power ultrafast lasers with a zigzag-geometry Yb:InnoSlab booster amplifier.
Authors: Najafi, Mohanna1, Shayganmanesh, Mahdi1 shaygan@iust.ac.ir, Majidof, M. Mahdi2
Source: Journal of Russian Laser Research. Feb2026, Vol. 47 Issue 1, p1-9. 9p.
Subjects: Girders, Optical amplifiers, Picosecond pulses, Ultra-short pulsed lasers, Active medium, Energy industries, Geometry, Numerical analysis, Fluid amplifiers
Abstract: 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. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Russian Laser Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Optimizing beam quality and gain in high-power ultrafast lasers with a zigzag-geometry Yb:InnoSlab booster amplifier.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Russian+Laser+Research%22">Journal of Russian Laser Research</searchLink>. Feb2026, Vol. 47 Issue 1, p1-9. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Girders%22">Girders</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+amplifiers%22">Optical amplifiers</searchLink><br /><searchLink fieldCode="DE" term="%22Picosecond+pulses%22">Picosecond pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Ultra-short+pulsed+lasers%22">Ultra-short pulsed lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Active+medium%22">Active medium</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+industries%22">Energy industries</searchLink><br /><searchLink fieldCode="DE" term="%22Geometry%22">Geometry</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+amplifiers%22">Fluid amplifiers</searchLink>
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  Label: Abstract
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  Data: 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Russian Laser Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10946-025-10260-7
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Optical amplifiers
        Type: general
      – SubjectFull: Picosecond pulses
        Type: general
      – SubjectFull: Ultra-short pulsed lasers
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      – SubjectFull: Energy industries
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      – SubjectFull: Geometry
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      – SubjectFull: Numerical analysis
        Type: general
      – SubjectFull: Fluid amplifiers
        Type: general
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      – TitleFull: Optimizing beam quality and gain in high-power ultrafast lasers with a zigzag-geometry Yb:InnoSlab booster amplifier.
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            NameFull: Najafi, Mohanna
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              Text: Feb2026
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              Y: 2026
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