Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Plasma Channel Extension by Femtosecond Laser Filamentation with a Circular Aperture Quartz Plate

Version 1 : Received: 21 June 2020 / Approved: 21 June 2020 / Online: 21 June 2020 (14:29:42 CEST)

How to cite: Li, Y.; Zhang, Z.; Song, H.; Liu, X.; Li, W.; Liu, S. Plasma Channel Extension by Femtosecond Laser Filamentation with a Circular Aperture Quartz Plate. Preprints 2020, 2020060273 (doi: 10.20944/preprints202006.0273.v1). Li, Y.; Zhang, Z.; Song, H.; Liu, X.; Li, W.; Liu, S. Plasma Channel Extension by Femtosecond Laser Filamentation with a Circular Aperture Quartz Plate. Preprints 2020, 2020060273 (doi: 10.20944/preprints202006.0273.v1).

Abstract

We propose a new approach of extending the laser filament plasma channel. By adding a circular aperture quartz plate before the focusing lens, the extension of the plasma channel is doubled. The effects of different diameters, thicknesses of the circular aperture quartz plate and different pulse energies on the length of the plasma channel were investigated. The experimental results show that the thickness of the quartz plate and the depth of the hole have little effects on the plasma channel of the filament, and the diameter of the hole in the center of the quartz plate has a significant effect on the length of the optical filament. The moving-focus model is used to explain the extension of the optical filament.

Subject Areas

femtosecond laser; plasma channel; filament elongation; circular aperture quartz plate

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