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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers
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Femtosecond pulse propagation in air: variational analysis

Akozbek1, Bowden, Talebpour

  • 1U.S Army Aviation and Missile Command, Weapons Sciences Directorate, Missile Research Development and Engineering Center, Redstone Arsenal, Huntsville, Alabama 35898-5000, USA.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|November 23, 2000
PubMed
Summary

A new variational method simplifies studying intense femtosecond pulse propagation in air. This approach offers a particle-in-a-potential-well analogy, explaining complex light-matter interactions and matching experimental findings.

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Area of Science:

  • Physics
  • Optics
  • Nonlinear Optics

Background:

  • Intense femtosecond pulse propagation in air is a complex phenomenon.
  • Understanding light-matter interactions is crucial for laser technology and atmospheric studies.

Purpose of the Study:

  • To develop a semianalytical method for studying intense femtosecond pulse propagation in air.
  • To provide a simplified physical interpretation of pulse propagation dynamics.
  • To explore various solution types and their physical meanings.

Main Methods:

  • Utilized a variational method to derive a semianalytical solution.
  • Reduced the propagation problem to an analogous particle-in-a-potential-well model.
  • Analyzed a wide range of initial conditions.

Main Results:

  • Obtained a semianalytical solution for femtosecond pulse propagation.
  • Established a physical analogy to particle dynamics in a potential well.
  • Qualitatively reproduced key experimental observations and numerical simulation results.

Conclusions:

  • The variational method offers an effective and interpretable approach to studying intense pulse propagation.
  • The particle-in-a-potential-well analogy provides valuable physical insight.
  • The method's validity is supported by its agreement with experimental and numerical data.