Diffraction-beam optics of filamentation. I. Formalism of diffraction beams and light tubes
Yu.E. Geints, A.A. Zemlyanov, O.V. Minina
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: фемтосекундные лазерные импульсы, самофокусировка, филаментация, дифракционный луч, дифракционно-лучевая трубка, femtosecond laser pulses, self-focusing, filamentation, diffraction ray, diffraction-beam tube
Abstract
The concept of non-stationary diffraction-beam optics of powerful femtosecond laser pulses is presented. According to the concept the power of a beam propagates along specific light structures--diffraction-beam tubes. These tubes do not intersect, do not exchange energy, but changes in their shape and cross sections during propagation reflect the effect of physical processes that occur with radiation in the medium. The non-stationary theory is supplemented with evolutionary equations for time averaged diffraction beams and effective squared radii of diffraction tubes.
|
