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Modifications of filament spectra by shaped octave-spanning laser pulses

Patas, Alexander
Matthews, Mary
Lindinger, Albrecht
Published in Physical Review. A. 2018, vol. 98, p. 033804
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.
arXiv: 1809.02445
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Research groups Groupe Wolf
Groupe Kasparian
ISE Pôle Sciences
ISE Pôle Informatique environnementale
Projects FNS: NCCR MUST (200021-117810)
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PATAS, Alexander et al. Modifications of filament spectra by shaped octave-spanning laser pulses. In: Physical Review. A, 2018, vol. 98, p. 033804. https://archive-ouverte.unige.ch/unige:107523

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Deposited on : 2018-09-10

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