Filamentation effects and second-harmonic spectra in laser-produced plasmas

Khalfaoui, A. H.; Abdelli, S.; Kerdja, T.; Ghobrini, D.

doi:10.1103/physreve.48.1337

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2009

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“…Harmonic generation through the interaction of high power lasers with plasmas has been the subject of many experimental and theoretical studies [1][2][3][4][5][6][7][8][9][10][11][12] beginning with the work by Burnett at al. [1] in the late 1970's, using CO 2 laser.…”

Section: Introductionmentioning

confidence: 99%

General Properties of and 2w0 Harmonics Emission from Laser Driven Plasmas

Dib¹,

Belbachir²

2008

American J. of Applied Sciences

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Using a simple model based on the conversion of electron plasma waves into electromagnetic waves through a process of parametric interaction of four waves, the general properties of the 3 0 2 ω emission and the 2 0 ω emission generated by the interaction of a Gaussian laser pulse with homogeneous plasma are studied. Some known characteristics of these emissions are reproduced within this model and compared to some experimental works. In particular, the two-wing structure of the emitted spectrum, the double-beam structure, the angular distribution and the conversion efficiency are obtained. Moreover, it is found that, the intensity of the backward beam is almost double of that of the forward beam in both emissions, while this later is narrower in the case of the 3 0 2 ω emission.

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