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<p>The study of self-compression of laser pulse having super-Gaussian profile in relativistically guided plasma has been investigated. A nonlinear propagation equation of laser pulse in plasma using relativistic nonlinearity has been derived. Moreover, a semi-analytical method was used to solve the nonlinear equation for self-compression and self-focusing of the laser pulse in plasma. It has been seen that pulse broadening and relativistic nonlinearity are sole origin for self-compression of Super-Gaussian laser pulse inside the plasma. The pulse broadening accure due to effect of group velocity dispersion (GVD) and when, nonlinearity combined (balanced) with it pulse broadening, result in formation of compressed and amplified pulse in enhance manner. Numerical computation result shows that, a 50&#xa0;fs laser pulse gets compressed into 17&#xa0;fs laser pulse.</p>

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Self-Compression of Femtosecond Super-Gaussian Laser Pulse in Relativistically Strong Plasma

  • 期刊论文

  • 发表日期：

    2025年7月21日

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  • Pratibha Jaiswal,
  • Sintu Kumar,
  • Km Shivani Bhardwaj,
  • Preeti Gupta,
  • Rajesh Kumar Rai

摘要

The study of self-compression of laser pulse having super-Gaussian profile in relativistically guided plasma has been investigated. A nonlinear propagation equation of laser pulse in plasma using relativistic nonlinearity has been derived. Moreover, a semi-analytical method was used to solve the nonlinear equation for self-compression and self-focusing of the laser pulse in plasma. It has been seen that pulse broadening and relativistic nonlinearity are sole origin for self-compression of Super-Gaussian laser pulse inside the plasma. The pulse broadening accure due to effect of group velocity dispersion (GVD) and when, nonlinearity combined (balanced) with it pulse broadening, result in formation of compressed and amplified pulse in enhance manner. Numerical computation result shows that, a 50 fs laser pulse gets compressed into 17 fs laser pulse.