Filamentation of high-power laser radiation in air and water: Comparative analysis

Journal Article · Sat Feb 27 23:00:00 EST 2010 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2010V040N02ABEH014199· OSTI ID:21471052

Geints, Yu E; Zemlyanov, A A ^[1]

---

1. V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk (Russian Federation)

The propagation of high-power femtosecond laser pulses is considered in the self-focusing and filamentation formation regime. Similarities and differences in the character of the laser beam filamentation are analysed qualitatively and quantitatively in the atmospheric air and water. Based on the numerical results, the most important parameters (radius, intensity, free electron density) in light and plasma filaments produced by ultrashort laser pulses are shown to depend strongly on the optical parameters of the propagation medium, and, first of all, on the Kerr nonlinearity coefficients and the photoionisation rate of the medium molecules. (nonlinear-optics phenomena)

• OSTI ID: 21471052
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 2 Vol. 40; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
AIR
BEAMS
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
FLUIDS
FOCUSING
GASES
HYDROGEN COMPOUNDS
IONIZATION
LASER RADIATION
MOLECULES
NONLINEAR PROBLEMS
OXYGEN COMPOUNDS
PHOTOIONIZATION
PLASMA FILAMENT
PULSES
RADIATIONS
VISIBLE RADIATION
WATER