Multiple scattering, modulation instability, and filamentation of a femtosecond laser pulse in a dispersion medium

Journal Article · Thu Nov 30 00:00:00 EST 2006 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2006V036N11ABEH013334· OSTI ID:21456905

Militsin, V O; Kachan, E P; Kandidov, V P ^[1]

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1. Department of Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)

Based on the stratified model of multiple coherent scattering of radiation in a dispersion medium, the nonlinear problem of the multiple filamentation of femtosecond laser pulses is studied by the Monte-Carlo method. It is shown that the modulation instability of a high-power light field, which develops on perturbations appearing upon coherent scattering by particles, causes the stochastic breakup of the pulse into numerous filaments. The influence of the size and concentration of particles in water aerosol on the generation of filamentation in a laser pulse is statistically estimated and the regions of different filamentation regimes are determined. The dynamic picture of the evolution of multiple filamentation and formation of plasma channels due to multiphoton ionisation upon aerosol scattering is obtained. (special issue devoted to multiple radiation scattering in random media)

• OSTI ID: 21456905
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 36, Issue 11; Other Information: DOI: 10.1070/QE2006v036n11ABEH013334; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AEROSOLS
COHERENT SCATTERING
DISTURBANCES
FILAMENTS
IONIZATION
LASERS
MONTE CARLO METHOD
MULTI-PHOTON PROCESSES
MULTIPLE SCATTERING
NONLINEAR PROBLEMS
PARTICLES
PLASMA
PLASMA INSTABILITY
PULSES
STOCHASTIC PROCESSES
VISIBLE RADIATION
WATER
CALCULATION METHODS
COLLOIDS
DISPERSIONS
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
INSTABILITY
OXYGEN COMPOUNDS
RADIATIONS
SCATTERING
SOLS