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arXiv · 1809.02445

Modifications of filament spectra by shaped octave-spanning laser pulses

Alexander Patas·Mary Matthews·Sylvain Hermelin·Julien Gateau·Jérôme Kasparian·Jean-Pierre Wolf·Albrecht Lindinger
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Abstract

In this paper we examine the spectral changes in a white light laser filament due to different pulse shapes generated by a pulse shaping setup. We particularly explore how the properties of the filament spectra can be controlled by parametrically tailored white light pulses. The experiments are carried out in a gas cell with up to 9 bar of argon. Plasma generation and self-phase modulation strongly affect the pulse in the spectral and temporal domain. By exploiting these effects we show that the pulse spectrum can be modified in a desired way by either using second order parametric chirp functions to shift the filament spectrum to higher or lower wavelengths, or by optimizing pulse shapes with a genetic algorithm to generate more complex filament spectra. This paper is one of the first examples of the application of complex, parametrically shaped white light pulses.

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Alexander Patas, Mary Matthews, Sylvain Hermelin, Julien Gateau, Jérôme Kasparian, Jean-Pierre Wolf, Albrecht Lindinger. 2018-09-07. Modifications of filament spectra by shaped octave-spanning laser pulses. https://doi.org/10.1103/physreva.98.033804

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