Abstract

The results of experiments and theoretical modeling of the multiple filamentation of terawatt-power femtosecond laser pulses on a 137 m long air path are presented. We use a multielement optical setup consisting of a Galilean telescope and a deformable bimorph mirror, which allows construction for the desired pulse wavefront at the optical path entrance. By introducing controlled aberrations of the pulse phase profile, we demonstrate the wide-ranging manipulations on the position and spatial structure of the filamentation region. For the first time, to the best of our knowledge, the stable wide-aperture (5 cm in diameter) ring-shaped spatial lattice of high-intense light channels is experimentally realized, which can persist over hundreds of meters in air.

© 2018 Optical Society of America

Experimental study of high-intensity light channels produced on an extended air path by phase and amplitude modulated femtosecond laser pulses

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Filamentation of femtosecond laser pulses governed by variable wavefront distortions via a deformable mirror

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Statistical parameters of femtosecond laser pulse post-filament propagation on a 65 m air path with localized optical turbulence

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Optimization of microwave emission from laser filamentation with a machine learning algorithm

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