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<p>This study presents the investigation of the previously scarcely explored high energy few-cycle post-compression regime. Experimental shortening of the 5&#xa0;mJ, 830&#xa0;nm and 7.7&#xa0;fs pulse with a flat-top spatial profile was achieved by nonlinear spectral broadening in a single 1&#xa0;mm thick fused silica plate. The results show <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathrm {3.8^{+0.20}_{-0.11}\,fs}\)</EquationSource> </InlineEquation> pulse duration with a <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\mathrm {64^{+2}_{-5}}\,\%\)</EquationSource> </InlineEquation> relative peak power. The achieved spatial-spectral homogeneity was <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(97.1\,\%\)</EquationSource> </InlineEquation>. By employing the deformable mirror wavefront correction the Strehl ratio of 0.88 was shown even in the presence of a strong nonlinear interaction. It was demonstrated that a simple numerical model can predict output spectral properties well. The presented research might enable the future generation of high energy and quality single-cycle super-octave pulses.</p>

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High energy 1.53-cycle pulses via homogeneous post-compression in a single thin-plate

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月25日

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  • Gaudenis Jansonas,
  • Dominykas Karvelis,
  • Pija Gadonaitė,
  • Arūnas Varanavičius

摘要

This study presents the investigation of the previously scarcely explored high energy few-cycle post-compression regime. Experimental shortening of the 5 mJ, 830 nm and 7.7 fs pulse with a flat-top spatial profile was achieved by nonlinear spectral broadening in a single 1 mm thick fused silica plate. The results show \(\mathrm {3.8^{+0.20}_{-0.11}\,fs}\) pulse duration with a \(\mathrm {64^{+2}_{-5}}\,\%\) relative peak power. The achieved spatial-spectral homogeneity was \(97.1\,\%\) . By employing the deformable mirror wavefront correction the Strehl ratio of 0.88 was shown even in the presence of a strong nonlinear interaction. It was demonstrated that a simple numerical model can predict output spectral properties well. The presented research might enable the future generation of high energy and quality single-cycle super-octave pulses.