Electromagnetic beam profile dynamics in collisional plasmas

Ashutosh Sharma, Jafar Borhanian, Yannis Kourakis

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The compression of a finite extent Gaussian laser pulse in collisional plasma is investigated. An analytical model is employed to describe the spatiotemporal evolution of a laser pulse propagating through the plasma medium. The pulse geometry is modeled via an appropriate ansatz which takes into account both beam radius (in space) and pulse width (in time). Compression and self-focusing are taken into account via appropriated group velocity dispersion and nonlinearity terms. The competition among the collisional nonlinearity in the plasma and the effect of divergence due to diffraction is pointed out and investigated numerically. Our results suggest that laser pulse compression and intensity localization is enhanced by plasma collisionality. In specific, a pulse width compression by an order of magnitude approximately is observed, for typical collisional laser plasma parameters, along with a significant increase in the intensity.
Original languageEnglish
Article number465501
Pages (from-to)465501-465512
Number of pages12
JournalJournal of Physics A: Mathematical and Theoretical
Volume42
Issue number46
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Statistical and Nonlinear Physics
  • Modelling and Simulation
  • Statistics and Probability

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