Evolution and control of laser-plasma channel in air

zhang ning; jin tao; deng yuan

Volume 22 Issue 08

Jul. 2010

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zhang ning, jin tao, deng yuan. Evolution and control of laser-plasma channel in air[J]. High Power Laser and Particle Beams, 2010, 22.

Citation:

zhang ning, jin tao, deng yuan. Evolution and control of laser-plasma channel in air[J]. High Power Laser and Particle Beams, 2010, 22.

zhang ning, jin tao, deng yuan. Evolution and control of laser-plasma channel in air[J]. High Power Laser and Particle Beams, 2010, 22.

Citation:

zhang ning, jin tao, deng yuan. Evolution and control of laser-plasma channel in air[J]. High Power Laser and Particle Beams, 2010, 22.

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Evolution and control of laser-plasma channel in air

1.
Department of Information Science and Electronic Engineering,Zhejiang University,Hangzhou 310027,China

Publish Date: 2010-07-12

Abstract

Abstract

A theoretical analysis is carried out to study the evolution of a laser-induced plasma channel in air. The extended nonlinear Schr-dinger equation describing the propagation of laser pulses in air is presented and analyzed, which includes the influence of diffraction, dispersion and multiphoton ionization, Raman scattering, plasma wake fields and relativistic focusing. The electron density and the beam intensity flux along the filament are estimated by solving the Schr-dinger equation using split-step Fourier method and finite difference method. The numerical calculations confirm that the position and pattern of the filaments are dependent on the wavelength, energy, pulse duration and transverse waist of the initial laser pulse．
- intense femtosecond pulse,
- plasma,
- nonlinear schr-dinger equation,
- self-focusing,
- filamentation

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