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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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Bibliographic Details
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]
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Database: Engineering Source
Description
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]
ISSN:10712836
DOI:10.1007/s10946-025-10260-7