Resonant instability of laser speckles in a semicollisional underdense plasma

A. V. Brantov; V. Yu. Bychenkov; V. T. Tikhonchuk; J. Myatt

doi:10.1117/12.425628

23 April 2001 Resonant instability of laser speckles in a semicollisional underdense plasma

A. V. Brantov, V. Yu. Bychenkov, V. T. Tikhonchuk, J. Myatt

Proceedings Volume 4424, ECLIM 2000: 26th European Conference on Laser Interaction with Matter; (2001) https://doi.org/10.1117/12.425628
Event: 26th European Conference on Laser Interaction with Matter (ECLIM 2000), 2000, Prague, Czech Republic

Abstract

Instability of a nonlinear laser filament formed due to cumulative effect of the ponderomotive and thermal self- focusing has been investigated in a weakly collisional underdense plasmas. This instability corresponds to the near-forward stimulated Brillouin scattering with excitation of a waveguide electromagnetic mode coupled to a localized supersonic density perturbation. Comparison with the collision-less ponderomotive case demonstrates a significant reduction of the instability threshold and a modification of its characteristics due to nonlocal thermal effects.

Citation Download Citation

A. V. Brantov, V. Yu. Bychenkov, V. T. Tikhonchuk, and J. Myatt "Resonant instability of laser speckles in a semicollisional underdense plasma", Proc. SPIE 4424, ECLIM 2000: 26th European Conference on Laser Interaction with Matter, (23 April 2001); https://doi.org/10.1117/12.425628

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