Analysis of the main processes during the propagation of high-power femtosecond laser pulses on the basis of the diffraction-ray tube method

A. A. Zemlyanov; O. V. Minina

doi:10.1117/12.2602325

15 December 2021 Analysis of the main processes during the propagation of high-power femtosecond laser pulses on the basis of the diffraction-ray tube method

A. A. Zemlyanov, O. V. Minina

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Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119160O (2021) https://doi.org/10.1117/12.2602325
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

The main processes during the propagation of high-power femtosecond laser pulses in air are analyzed. The theoretical description of self-focusing and filamentation of laser radiation was performed on the basis of the diffraction-ray tubes method. Using the method of characteristics, the equation for the intensity was modified, and the equation for the power in the diffraction-ray tube was obtained. A relationship for the power balance of various processes in the filamentation domain was established. The mechanisms for replenishing energy losses in the filamentation domain caused by plasma formation was determined. The first of them is the transverse flux from the adjacent tube (so-called energy-replenishing diffraction-ray tube). The second mechanism is associated with the inflow of energy stored in the previous time slices of the laser pulse due to dispersion.

Citation Download Citation

A. A. Zemlyanov and O. V. Minina "Analysis of the main processes during the propagation of high-power femtosecond laser pulses on the basis of the diffraction-ray tube method", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119160O (15 December 2021); https://doi.org/10.1117/12.2602325

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KEYWORDS

Femtosecond phenomena

High power lasers

Atmospheric propagation

Diffraction

Dispersion

Light wave propagation

Plasma

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