This article is cited in 14 papers

Nonlinear optical phenomena

Interaction of noncollinear femtosecond laser filaments in sapphire

A. A. Dergachev^ab, V. N. Kadan^c, S. A. Shlenov<sup>ab

a</sup> Lomonosov Moscow State University, Faculty of Physics
^b International Laser Center of Moscow State University
^c Institute of Physics, National Academy of Sciences of Ukraine, Kiev

Abstract: The interaction of two coherent femtosecond laser pulses, propagating at a small angle with respect to each other in a sapphire crystal in the filamentation regime, has been investigated numerically and experimentally. Distributions of the fluence and free-electron density in the laser-plasma channels formed in the crystal are obtained. Additional filaments are found to form outside the plane of initial pulse propagation.

Keywords: filamentation, femtosecond radiation, laser plasma, filament interaction.

PACS: 42.65.Jx, 42.65.Re, 52.50.Jm

Received: 19.10.2011
Revised: 05.12.2011

 English version: Quantum Electronics, 2012, 42:2, 125–129

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