20 meter long permanent air waveguide produced by filamentation of a kHz collimated Laguerre-Gauss beam
0
Citation
0
Reference
10
Related Paper
Keywords:
Filamentation
Collimated light
Waveguide
Filamentation
Cite
Citations (3)
We demonstrated how the moving focus model developed for condensed media should be modified for the explanation of experiments on filamentation of high-power femtosecond laser pulses in air. This modification is based on the consideration of gas ionization in high-intensity laser field. Numerical simulations based on this modified model allow for the explanation not only of filamentation itself but also the accompanying phenomena such as refocusing and conical emission.
Filamentation
Cite
Citations (53)
We report a study of the photoacoustic energy conversion efficiency under femtosecond filamentation in water. We characterized the interaction of ultra-short laser pulse with water under different temperatures and filamentation regimes.
Filamentation
Cite
Citations (0)
Filamentation
Monochromatic color
Cite
Citations (12)
High-power femtosecond laser pulses undergo large-scale transformations during filamentation in a nonlinear medium. Spatial transformations result in the formation of the post-filamentation channels—intense spatially localized light structures observed in the laser beam at the plasma-free stage of pulse propagation. We present the experimental results on the main characteristics of post-filamentation channels formed by the filamentation of Ti:sapphire laser pulses (744 nm, 90 fs) in air. Angular divergence, spectral composition, power, and temporal parameters of post-filamentation channels at different initial pulse energy are investigated. We study a specific cascade pulse filamentation regime when the post-filamentation channel is initially formed in air and then experiences recurrent filamentation in a condensed medium (fused silica).
Filamentation
Plasma channel
Cite
Citations (8)
We demonstrate that thermal effects limiting femtosecond laser filamentation in gases can be addressed using a simple gas replenishment method. This enables high average power filamentation applications like THz sources.
Filamentation
Limiting
Cite
Citations (0)
Self-focusing and filamentation of externally focused ultrashort laser radiation in air are discussed. The influence of initial beam focusing on the filamentation length is numerically studied, and the conditions under which a light filament can resurrect after the linear focus are determined. We have found that the probability of this post-focal filamentation increases with an increase of laser power regardless of the type of filamentation (single/multiple).
Filamentation
Self-focusing
Cite
Citations (6)
In this work, influence of intense relativistic influence and plasma nonuniformity on ultrarelativistic laser beam filamentation and filamentation instability has been investigated in homogeneous and inhomogeneous plasma. The results are shown that, in ultrarelativistic laser-plasma interaction, relativistic effect plays a crucial role on beam filamentation and self-focusing, and plasma inhomogeneity further increases beam filamentation, while it also strengthens filamentation instability. To avoid filamentation instability, the research results show that it should try to reduce plasma inhomogeneity in laser-plasma interaction.
Filamentation
Self-focusing
Cite
Citations (0)
While filaments are generally interpreted as a dynamic balance between Kerr focusing and plasma defocusing, the role of the higher-order Kerr effect (HOKE) is actively debated as a potentially dominant defocusing contribution to filament stabilization. In a pump-probe experiment supported by numerical simulations, we demonstrate the transition between two distinct filamentation regimes at 800 nm. For long pulses (1.2 ps), the plasma substantially contributes to filamentation, while this contribution vanishes for short pulses (70 fs). These results confirm the occurrence, in adequate conditions, of filamentation driven by the HOKE rather than by plasma.
Filamentation
Self-focusing
Cite
Citations (98)
The ability of the human pathogenic fungus
Filamentation
Pathogenic fungus
Cite
Citations (68)