Paper
2 December 2021 Large aperture stretchers for high intensity laser systems
Dmitriy O. Shvydkoy, Vladimir I. Trunov
Author Affiliations +
Proceedings Volume 12086, XV International Conference on Pulsed Lasers and Laser Applications; 120860K (2021) https://doi.org/10.1117/12.2613632
Event: XV International Conference on Pulsed Lasers and Laser Applications, 2021, Tomsk, Russian Federation
Abstract
The paper presents analysis results of large aperture stretcher schemes for use in laser systems after pre-amplification stages. To increase output peak power in the two-channel femtosecond laser system with coherent field combining, developed at ILP SB RAS, a stretcher for deployment in front of additional amplification stages is required. The stretcher and additional stages will boost pulse energy in a channel up to 1.5 J. Since beam energy at stretcher input is 100-150 mJ, beam diameter exceeds 20 mm what, is determined by damage thresholds of stretcher elements. With a stretching ratio of 105 and such an aperture, aberrational distortions of the stretcher obstruct further compression, focusing, and effective coherent combining of amplified pulses. Optimized parameters of the off-axis and off-plane Offner stretchers allow pulse stretching to 2.1 ns (spectrally limited duration ~20 fs and carrier wavelength 0.83 μm) and subsequent recompression down to 24 fs and 35 fs in a beam with 20 mm aperture.
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Dmitriy O. Shvydkoy and Vladimir I. Trunov "Large aperture stretchers for high intensity laser systems", Proc. SPIE 12086, XV International Conference on Pulsed Lasers and Laser Applications, 120860K (2 December 2021); https://doi.org/10.1117/12.2613632
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KEYWORDS
Laser systems engineering

Telescopes

Laser damage threshold

Laser development

Geometrical optics

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