Interaction/laser radiation with matter filamentation of laser pulses with different wavelengths in air

Propagation in the air of laser radiation with wavelengths in the range from 248 to 1240 nm are investigated numerically. It was shown that the intensity in a filament weakly depends on the wavelength in a long-wave region and decreases significantly in the UV region. Electron concentration in a plasma channel increases with a wavelength decrease with a dependence close to quadratic. With an increase in the wavelength characteristic scale of the intensity variation in the pulse cross section, the radii of the filament and plasma channel increase.